diff --git a/cmdutils.c b/cmdutils.c
index 64ed2b8051..4b9ae67856 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -38,7 +38,7 @@
 #include "libavutil/parseutils.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/eval.h"
-#include "libavcodec/opt.h"
+#include "libavutil/opt.h"
 #include "cmdutils.h"
 #include "version.h"
 #if CONFIG_NETWORK
diff --git a/doc/APIchanges b/doc/APIchanges
index e8d8ce26af..e7392ed4db 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -12,6 +12,11 @@ libavutil:   2009-03-08
 
 API changes, most recent first:
 
+2011-04-15 - lavc 52.120.0 - avcodec.h
+  AVPacket structure got additional members for passing side information:
+    4de339e introduce side information for AVPacket
+    2d8591c make containers pass palette change in AVPacket
+
 2011-04-12 - lavf 52.107.0 - avio.h
   Avio cleanup, part II - deprecate the entire URLContext API:
     175389c add avio_check as a replacement for url_exist
diff --git a/ffmpeg.c b/ffmpeg.c
index eadfc8072d..ec0a0235d1 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -34,7 +34,7 @@
 #include "libavformat/avformat.h"
 #include "libavdevice/avdevice.h"
 #include "libswscale/swscale.h"
-#include "libavcodec/opt.h"
+#include "libavutil/opt.h"
 #include "libavcodec/audioconvert.h"
 #include "libavutil/audioconvert.h"
 #include "libavutil/parseutils.h"
@@ -113,9 +113,7 @@ typedef struct AVChapterMap {
 static const OptionDef options[];
 
 #define MAX_FILES 100
-#if !FF_API_MAX_STREAMS
 #define MAX_STREAMS 1024    /* arbitrary sanity check value */
-#endif
 
 static const char *last_asked_format = NULL;
 static AVFormatContext *input_files[MAX_FILES];
@@ -3869,7 +3867,7 @@ static void opt_output_file(const char *filename)
             (strchr(filename, ':') == NULL ||
              filename[1] == ':' ||
              av_strstart(filename, "file:", NULL))) {
-            if (url_exist(filename)) {
+            if (avio_check(filename, 0) == 0) {
                 if (!using_stdin) {
                     fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
                     fflush(stderr);
@@ -3886,7 +3884,7 @@ static void opt_output_file(const char *filename)
         }
 
         /* open the file */
-        if ((err = avio_open(&oc->pb, filename, AVIO_WRONLY)) < 0) {
+        if ((err = avio_open(&oc->pb, filename, AVIO_FLAG_WRITE)) < 0) {
             print_error(filename, err);
             ffmpeg_exit(1);
         }
diff --git a/ffplay.c b/ffplay.c
index 8a55e7df5b..eb5b278966 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -36,7 +36,7 @@
 #include "libavdevice/avdevice.h"
 #include "libswscale/swscale.h"
 #include "libavcodec/audioconvert.h"
-#include "libavcodec/opt.h"
+#include "libavutil/opt.h"
 #include "libavcodec/avfft.h"
 
 #if CONFIG_AVFILTER
diff --git a/ffprobe.c b/ffprobe.c
index 9c2fd433b6..228aaab5fa 100644
--- a/ffprobe.c
+++ b/ffprobe.c
@@ -23,7 +23,7 @@
 
 #include "libavformat/avformat.h"
 #include "libavcodec/avcodec.h"
-#include "libavcodec/opt.h"
+#include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"
 #include "libavdevice/avdevice.h"
 #include "cmdutils.h"
diff --git a/ffserver.c b/ffserver.c
index a047e7338b..8ae580cc39 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -40,7 +40,7 @@
 #include "libavutil/lfg.h"
 #include "libavutil/random_seed.h"
 #include "libavutil/parseutils.h"
-#include "libavcodec/opt.h"
+#include "libavutil/opt.h"
 #include <stdarg.h>
 #include <unistd.h>
 #include <fcntl.h>
@@ -95,9 +95,7 @@ static const char *http_state[] = {
     "RTSP_SEND_PACKET",
 };
 
-#if !FF_API_MAX_STREAMS
 #define MAX_STREAMS 20
-#endif
 
 #define IOBUFFER_INIT_SIZE 8192
 
@@ -2944,11 +2942,9 @@ static int prepare_sdp_description(FFStream *stream, uint8_t **pbuffer,
         snprintf(avc->filename, 1024, "rtp://0.0.0.0");
     }
 
-#if !FF_API_MAX_STREAMS
     if (avc->nb_streams >= INT_MAX/sizeof(*avc->streams) ||
         !(avc->streams = av_malloc(avc->nb_streams * sizeof(*avc->streams))))
         goto sdp_done;
-#endif
     if (avc->nb_streams >= INT_MAX/sizeof(*avs) ||
         !(avs = av_malloc(avc->nb_streams * sizeof(*avs))))
         goto sdp_done;
@@ -2961,9 +2957,7 @@ static int prepare_sdp_description(FFStream *stream, uint8_t **pbuffer,
     av_sdp_create(&avc, 1, *pbuffer, 2048);
 
  sdp_done:
-#if !FF_API_MAX_STREAMS
     av_free(avc->streams);
-#endif
     av_metadata_free(&avc->metadata);
     av_free(avc);
     av_free(avs);
@@ -3428,7 +3422,7 @@ static int rtp_new_av_stream(HTTPContext *c,
                      "rtp://%s:%d", ipaddr, ntohs(dest_addr->sin_port));
         }
 
-        if (url_open(&h, ctx->filename, AVIO_WRONLY) < 0)
+        if (url_open(&h, ctx->filename, AVIO_FLAG_WRITE) < 0)
             goto fail;
         c->rtp_handles[stream_index] = h;
         max_packet_size = url_get_max_packet_size(h);
@@ -3685,7 +3679,7 @@ static void build_feed_streams(void)
     for(feed = first_feed; feed != NULL; feed = feed->next_feed) {
         int fd;
 
-        if (url_exist(feed->feed_filename)) {
+        if (avio_check(feed->feed_filename, AVIO_FLAG_READ) > 0) {
             /* See if it matches */
             AVFormatContext *s;
             int matches = 0;
@@ -3758,7 +3752,7 @@ static void build_feed_streams(void)
                 unlink(feed->feed_filename);
             }
         }
-        if (!url_exist(feed->feed_filename)) {
+        if (avio_check(feed->feed_filename, AVIO_FLAG_WRITE) <= 0) {
             AVFormatContext s1 = {0}, *s = &s1;
 
             if (feed->readonly) {
@@ -3768,7 +3762,7 @@ static void build_feed_streams(void)
             }
 
             /* only write the header of the ffm file */
-            if (avio_open(&s->pb, feed->feed_filename, AVIO_WRONLY) < 0) {
+            if (avio_open(&s->pb, feed->feed_filename, AVIO_FLAG_WRITE) < 0) {
                 http_log("Could not open output feed file '%s'\n",
                          feed->feed_filename);
                 exit(1);
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index e1432b3a96..aa7390be19 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -3,7 +3,7 @@ include $(SUBDIR)../config.mak
 NAME = avcodec
 FFLIBS = avutil
 
-HEADERS = avcodec.h avfft.h dxva2.h opt.h vaapi.h vdpau.h version.h xvmc.h
+HEADERS = avcodec.h avfft.h dxva2.h vaapi.h vdpau.h version.h xvmc.h
 
 OBJS = allcodecs.o                                                      \
        audioconvert.o                                                   \
@@ -15,7 +15,6 @@ OBJS = allcodecs.o                                                      \
        fmtconvert.o                                                     \
        imgconvert.o                                                     \
        jrevdct.o                                                        \
-       opt.o                                                            \
        options.o                                                        \
        parser.o                                                         \
        raw.o                                                            \
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 33ae03121b..dd1dd6bf3b 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -33,12 +33,6 @@
 
 #include "libavcodec/version.h"
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-#   define FF_INTERNALC_MEM_TYPE unsigned int
-#else
-#   define FF_INTERNALC_MEM_TYPE size_t
-#endif
-
 /**
  * Identify the syntax and semantics of the bitstream.
  * The principle is roughly:
@@ -117,9 +111,6 @@ enum CodecID {
     CODEC_ID_QDRAW,
     CODEC_ID_VIXL,
     CODEC_ID_QPEG,
-#if LIBAVCODEC_VERSION_MAJOR < 53
-    CODEC_ID_XVID,
-#endif
     CODEC_ID_PNG,
     CODEC_ID_PPM,
     CODEC_ID_PBM,
@@ -366,18 +357,6 @@ enum CodecID {
     CODEC_ID_FFMETADATA=0x21000,   ///< Dummy codec for streams containing only metadata information.
 };
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-#define CodecType AVMediaType
-
-#define CODEC_TYPE_UNKNOWN    AVMEDIA_TYPE_UNKNOWN
-#define CODEC_TYPE_VIDEO      AVMEDIA_TYPE_VIDEO
-#define CODEC_TYPE_AUDIO      AVMEDIA_TYPE_AUDIO
-#define CODEC_TYPE_DATA       AVMEDIA_TYPE_DATA
-#define CODEC_TYPE_SUBTITLE   AVMEDIA_TYPE_SUBTITLE
-#define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
-#define CODEC_TYPE_NB         AVMEDIA_TYPE_NB
-#endif
-
 #if FF_API_OLD_SAMPLE_FMT
 #define SampleFormat AVSampleFormat
 
@@ -1112,9 +1091,6 @@ typedef struct AVPacket {
     int64_t convergence_duration;
 } AVPacket;
 #define AV_PKT_FLAG_KEY   0x0001
-#if LIBAVCODEC_VERSION_MAJOR < 53
-#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
-#endif
 
 /**
  * Audio Video Frame.
@@ -1289,9 +1265,6 @@ typedef struct AVCodecContext {
      */
     int frame_size;
     int frame_number;   ///< audio or video frame number
-#if LIBAVCODEC_VERSION_MAJOR < 53
-    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
-#endif
 
     /**
      * Number of frames the decoded output will be delayed relative to
@@ -1476,9 +1449,6 @@ typedef struct AVCodecContext {
 #define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
 #define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
 #define FF_COMPLIANCE_NORMAL        0
-#if FF_API_INOFFICIAL
-#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
-#endif
 #define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
 
@@ -1752,25 +1722,6 @@ typedef struct AVCodecContext {
      */
     unsigned dsp_mask;
 
-#if FF_API_MM_FLAGS
-#define FF_MM_FORCE      AV_CPU_FLAG_FORCE
-#define FF_MM_MMX        AV_CPU_FLAG_MMX
-#define FF_MM_3DNOW      AV_CPU_FLAG_3DNOW
-#define FF_MM_MMXEXT     AV_CPU_FLAG_MMX2
-#define FF_MM_MMX2       AV_CPU_FLAG_MMX2
-#define FF_MM_SSE        AV_CPU_FLAG_SSE
-#define FF_MM_SSE2       AV_CPU_FLAG_SSE2
-#define FF_MM_SSE2SLOW   AV_CPU_FLAG_SSE2SLOW
-#define FF_MM_3DNOWEXT   AV_CPU_FLAG_3DNOWEXT
-#define FF_MM_SSE3       AV_CPU_FLAG_SSE3
-#define FF_MM_SSE3SLOW   AV_CPU_FLAG_SSE3SLOW
-#define FF_MM_SSSE3      AV_CPU_FLAG_SSSE3
-#define FF_MM_SSE4       AV_CPU_FLAG_SSE4
-#define FF_MM_SSE42      AV_CPU_FLAG_SSE42
-#define FF_MM_IWMMXT     AV_CPU_FLAG_IWMMXT
-#define FF_MM_ALTIVEC    AV_CPU_FLAG_ALTIVEC
-#endif
-
     /**
      * bits per sample/pixel from the demuxer (needed for huffyuv).
      * - encoding: Set by libavcodec.
@@ -2562,16 +2513,6 @@ typedef struct AVCodecContext {
     int compression_level;
 #define FF_COMPRESSION_DEFAULT -1
 
-#if FF_API_USE_LPC
-    /**
-     * Sets whether to use LPC mode - used by FLAC encoder.
-     * - encoding: Set by user.
-     * - decoding: unused
-     * @deprecated Deprecated in favor of lpc_type and lpc_passes.
-     */
-    int use_lpc;
-#endif
-
     /**
      * LPC coefficient precision - used by FLAC encoder
      * - encoding: Set by user.
@@ -3269,14 +3210,6 @@ struct AVResampleContext;
 
 typedef struct ReSampleContext ReSampleContext;
 
-#if FF_API_AUDIO_OLD
-/**
- * @deprecated Use av_audio_resample_init() instead.
- */
-attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
-                                                          int output_rate, int input_rate);
-#endif
-
 /**
  *  Initialize audio resampling context.
  *
@@ -3436,23 +3369,6 @@ const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
 
 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * Return the pixel format corresponding to the name name.
- *
- * If there is no pixel format with name name, then look for a
- * pixel format with the name corresponding to the native endian
- * format of name.
- * For example in a little-endian system, first look for "gray16",
- * then for "gray16le".
- *
- * Finally if no pixel format has been found, return PIX_FMT_NONE.
- *
- * @deprecated Deprecated in favor of av_get_pix_fmt().
- */
-attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
-#endif
-
 /**
  * Return a value representing the fourCC code associated to the
  * pixel format pix_fmt, or 0 if no associated fourCC code can be
@@ -3521,14 +3437,6 @@ int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_
 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
                               int has_alpha, int *loss_ptr);
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * @deprecated Use av_get_pix_fmt_string() instead.
- */
-attribute_deprecated
-void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
-#endif
-
 #define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
 #define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
 
@@ -3579,13 +3487,6 @@ const char *avcodec_license(void);
  */
 void avcodec_init(void);
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * @deprecated Deprecated in favor of avcodec_register().
- */
-attribute_deprecated void register_avcodec(AVCodec *codec);
-#endif
-
 /**
  * Register the codec codec and initialize libavcodec.
  *
@@ -3730,24 +3631,8 @@ void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
                                int linesize_align[4]);
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * @deprecated Deprecated in favor of av_check_image_size().
- */
-attribute_deprecated
-int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
-#endif
-
 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * @deprecated Set s->thread_count before calling avcodec_open() instead of calling this.
- */
-attribute_deprecated
-int avcodec_thread_init(AVCodecContext *s, int thread_count);
-void avcodec_thread_free(AVCodecContext *s);
-#endif
 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
 //FIXME func typedef
@@ -3781,25 +3666,6 @@ int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2,
  */
 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
 
-#if FF_API_AUDIO_OLD
-/**
- * Decode an audio frame from buf into samples.
- * Wrapper function which calls avcodec_decode_audio3.
- *
- * @deprecated Use avcodec_decode_audio3 instead.
- * @param avctx the codec context
- * @param[out] samples the output buffer
- * @param[in,out] frame_size_ptr the output buffer size in bytes
- * @param[in] buf the input buffer
- * @param[in] buf_size the input buffer size in bytes
- * @return On error a negative value is returned, otherwise the number of bytes
- * used or zero if no frame could be decompressed.
- */
-attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
-                         int *frame_size_ptr,
-                         const uint8_t *buf, int buf_size);
-#endif
-
 /**
  * Decode the audio frame of size avpkt->size from avpkt->data into samples.
  * Some decoders may support multiple frames in a single AVPacket, such
@@ -3843,25 +3709,6 @@ int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
                          int *frame_size_ptr,
                          AVPacket *avpkt);
 
-#if FF_API_VIDEO_OLD
-/**
- * Decode a video frame from buf into picture.
- * Wrapper function which calls avcodec_decode_video2.
- *
- * @deprecated Use avcodec_decode_video2 instead.
- * @param avctx the codec context
- * @param[out] picture The AVFrame in which the decoded video frame will be stored.
- * @param[in] buf the input buffer
- * @param[in] buf_size the size of the input buffer in bytes
- * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
- * @return On error a negative value is returned, otherwise the number of bytes
- * used or zero if no frame could be decompressed.
- */
-attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
-                         int *got_picture_ptr,
-                         const uint8_t *buf, int buf_size);
-#endif
-
 /**
  * Decode the video frame of size avpkt->size from avpkt->data into picture.
  * Some decoders may support multiple frames in a single AVPacket, such
@@ -3906,15 +3753,6 @@ int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
                          int *got_picture_ptr,
                          AVPacket *avpkt);
 
-#if FF_API_SUBTITLE_OLD
-/* Decode a subtitle message. Return -1 if error, otherwise return the
- * number of bytes used. If no subtitle could be decompressed,
- * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
-attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
-                            int *got_sub_ptr,
-                            const uint8_t *buf, int buf_size);
-#endif
-
 /**
  * Decode a subtitle message.
  * Return a negative value on error, otherwise return the number of bytes used.
@@ -4179,15 +4017,6 @@ AVCodecParser *av_parser_next(AVCodecParser *c);
 void av_register_codec_parser(AVCodecParser *parser);
 AVCodecParserContext *av_parser_init(int codec_id);
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-attribute_deprecated
-int av_parser_parse(AVCodecParserContext *s,
-                    AVCodecContext *avctx,
-                    uint8_t **poutbuf, int *poutbuf_size,
-                    const uint8_t *buf, int buf_size,
-                    int64_t pts, int64_t dts);
-#endif
-
 /**
  * Parse a packet.
  *
@@ -4266,7 +4095,7 @@ AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
  *
  * @see av_realloc
  */
-void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
+void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size);
 
 /**
  * Allocate a buffer, reusing the given one if large enough.
@@ -4280,17 +4109,7 @@ void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_s
  * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
  *                 *size 0 if an error occurred.
  */
-void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * @deprecated Deprecated in favor of av_image_copy().
- */
-attribute_deprecated
-void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
-                          uint8_t *src_data[4], int src_linesize[4],
-                          enum PixelFormat pix_fmt, int width, int height);
-#endif
+void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
 
 /**
  * Copy image src to dst. Wraps av_picture_data_copy() above.
@@ -4319,22 +4138,6 @@ int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
  */
 unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * Parse str and put in width_ptr and height_ptr the detected values.
- *
- * @deprecated Deprecated in favor of av_parse_video_size().
- */
-attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
-
-/**
- * Parse str and store the detected values in *frame_rate.
- *
- * @deprecated Deprecated in favor of av_parse_video_rate().
- */
-attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
-#endif
-
 /**
  * Logs a generic warning message about a missing feature. This function is
  * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index d2e64b0e97..8240372270 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -120,14 +120,6 @@ void ff_bink_idct_put_c(uint8_t *dest, int linesize, DCTELEM *block);
 void ff_ea_idct_put_c(uint8_t *dest, int linesize, DCTELEM *block);
 
 /* 1/2^n downscaling functions from imgconvert.c */
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- * @deprecated Use av_image_copy_plane() instead.
- */
-attribute_deprecated
-void ff_img_copy_plane(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);
-#endif
-
 void ff_shrink22(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);
 void ff_shrink44(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);
 void ff_shrink88(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);
diff --git a/libavcodec/flacenc.c b/libavcodec/flacenc.c
index 7c814700b1..051de69c40 100644
--- a/libavcodec/flacenc.c
+++ b/libavcodec/flacenc.c
@@ -285,17 +285,6 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
     s->options.max_partition_order = ((int[]){  2,  2,  3,  3,  3,  8,  8,  8,  8,  8,  8,  8,  8})[level];
 
     /* set compression option overrides from AVCodecContext */
-#if FF_API_USE_LPC
-    /* for compatibility with deprecated AVCodecContext.use_lpc */
-    if (avctx->use_lpc == 0) {
-        s->options.lpc_type = AV_LPC_TYPE_FIXED;
-    } else if (avctx->use_lpc == 1) {
-        s->options.lpc_type = AV_LPC_TYPE_LEVINSON;
-    } else if (avctx->use_lpc > 1) {
-        s->options.lpc_type   = AV_LPC_TYPE_CHOLESKY;
-        s->options.lpc_passes = avctx->use_lpc - 1;
-    }
-#endif
     if (avctx->lpc_type > AV_LPC_TYPE_DEFAULT) {
         if (avctx->lpc_type > AV_LPC_TYPE_CHOLESKY) {
             av_log(avctx, AV_LOG_ERROR, "unknown lpc type: %d\n", avctx->lpc_type);
diff --git a/libavcodec/imgconvert.c b/libavcodec/imgconvert.c
index b37c343b93..59630dfb09 100644
--- a/libavcodec/imgconvert.c
+++ b/libavcodec/imgconvert.c
@@ -425,40 +425,11 @@ const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt)
         return av_pix_fmt_descriptors[pix_fmt].name;
 }
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-enum PixelFormat avcodec_get_pix_fmt(const char *name)
-{
-    return av_get_pix_fmt(name);
-}
-
-void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt)
-{
-    av_get_pix_fmt_string(buf, buf_size, pix_fmt);
-}
-#endif
-
 int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt)
 {
     return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
 }
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-int ff_set_systematic_pal(uint32_t pal[256], enum PixelFormat pix_fmt){
-    return ff_set_systematic_pal2(pal, pix_fmt);
-}
-
-int ff_fill_linesize(AVPicture *picture, enum PixelFormat pix_fmt, int width)
-{
-    return av_image_fill_linesizes(picture->linesize, pix_fmt, width);
-}
-
-int ff_fill_pointer(AVPicture *picture, uint8_t *ptr, enum PixelFormat pix_fmt,
-                    int height)
-{
-    return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
-}
-#endif
-
 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
                    enum PixelFormat pix_fmt, int width, int height)
 {
@@ -693,28 +664,6 @@ enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelForma
     return dst_pix_fmt;
 }
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-void ff_img_copy_plane(uint8_t *dst, int dst_wrap,
-                           const uint8_t *src, int src_wrap,
-                           int width, int height)
-{
-    av_image_copy_plane(dst, dst_wrap, src, src_wrap, width, height);
-}
-
-int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
-{
-    return av_image_get_linesize(pix_fmt, width, plane);
-}
-
-void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
-                          uint8_t *src_data[4], int src_linesize[4],
-                          enum PixelFormat pix_fmt, int width, int height)
-{
-    av_image_copy(dst_data, dst_linesize, src_data, src_linesize,
-                  pix_fmt, width, height);
-}
-#endif
-
 void av_picture_copy(AVPicture *dst, const AVPicture *src,
                      enum PixelFormat pix_fmt, int width, int height)
 {
diff --git a/libavcodec/libvo-aacenc.c b/libavcodec/libvo-aacenc.c
index 3475a5cfe6..0efb79b1c1 100644
--- a/libavcodec/libvo-aacenc.c
+++ b/libavcodec/libvo-aacenc.c
@@ -59,7 +59,7 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
     if (s->codec_api.SetParam(s->handle, VO_PID_AAC_ENCPARAM, &params)
         != VO_ERR_NONE) {
         av_log(avctx, AV_LOG_ERROR, "Unable to set encoding parameters\n");
-        return AVERROR_UNKNOWN;
+        return AVERROR(EINVAL);
     }
 
     for (index = 0; index < 16; index++)
@@ -68,7 +68,7 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
     if (index == 16) {
         av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate %d\n",
                                     avctx->sample_rate);
-        return AVERROR_NOTSUPP;
+        return AVERROR(ENOSYS);
     }
     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
         avctx->extradata_size = 2;
@@ -110,14 +110,14 @@ static int aac_encode_frame(AVCodecContext *avctx,
     if (s->codec_api.GetOutputData(s->handle, &output, &output_info)
         != VO_ERR_NONE) {
         av_log(avctx, AV_LOG_ERROR, "Unable to encode frame\n");
-        return AVERROR_UNKNOWN;
+        return AVERROR(EINVAL);
     }
     return output.Length;
 }
 
 AVCodec ff_libvo_aacenc_encoder = {
     "libvo_aacenc",
-    CODEC_TYPE_AUDIO,
+    AVMEDIA_TYPE_AUDIO,
     CODEC_ID_AAC,
     sizeof(AACContext),
     aac_encode_init,
diff --git a/libavcodec/libvo-amrwbenc.c b/libavcodec/libvo-amrwbenc.c
index 7b9e66a247..ec23aeb7f8 100644
--- a/libavcodec/libvo-amrwbenc.c
+++ b/libavcodec/libvo-amrwbenc.c
@@ -119,7 +119,7 @@ static int amr_wb_encode_frame(AVCodecContext *avctx,
 
 AVCodec ff_libvo_amrwbenc_encoder = {
     "libvo_amrwbenc",
-    CODEC_TYPE_AUDIO,
+    AVMEDIA_TYPE_AUDIO,
     CODEC_ID_AMR_WB,
     sizeof(AMRWBContext),
     amr_wb_encode_init,
diff --git a/libavcodec/opt.c b/libavcodec/opt.c
deleted file mode 100644
index ffa422ec93..0000000000
--- a/libavcodec/opt.c
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * AVOptions ABI compatibility wrapper
- * Copyright (c) 2010 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "avcodec.h"
-#include "opt.h"
-
-#if LIBAVCODEC_VERSION_MAJOR < 53 && CONFIG_SHARED && HAVE_SYMVER
-
-FF_SYMVER(const AVOption *, av_find_opt, (void *obj, const char *name, const char *unit, int mask, int flags), "LIBAVCODEC_52"){
-    return av_find_opt(obj, name, unit, mask, flags);
-}
-FF_SYMVER(int, av_set_string3, (void *obj, const char *name, const char *val, int alloc, const AVOption **o_out), "LIBAVCODEC_52"){
-    return av_set_string3(obj, name, val, alloc, o_out);
-}
-FF_SYMVER(const AVOption *, av_set_double, (void *obj, const char *name, double n), "LIBAVCODEC_52"){
-    return av_set_double(obj, name, n);
-}
-FF_SYMVER(const AVOption *, av_set_q, (void *obj, const char *name, AVRational n), "LIBAVCODEC_52"){
-    return av_set_q(obj, name, n);
-}
-FF_SYMVER(const AVOption *, av_set_int, (void *obj, const char *name, int64_t n), "LIBAVCODEC_52"){
-    return av_set_int(obj, name, n);
-}
-FF_SYMVER(double, av_get_double, (void *obj, const char *name, const AVOption **o_out), "LIBAVCODEC_52"){
-    return av_get_double(obj, name, o_out);
-}
-FF_SYMVER(AVRational, av_get_q, (void *obj, const char *name, const AVOption **o_out), "LIBAVCODEC_52"){
-    return av_get_q(obj, name, o_out);
-}
-FF_SYMVER(int64_t, av_get_int, (void *obj, const char *name, const AVOption **o_out), "LIBAVCODEC_52"){
-    return av_get_int(obj, name, o_out);
-}
-FF_SYMVER(const char *, av_get_string, (void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len), "LIBAVCODEC_52"){
-    return av_get_string(obj, name, o_out, buf, buf_len);
-}
-FF_SYMVER(const AVOption *, av_next_option, (void *obj, const AVOption *last), "LIBAVCODEC_52"){
-    return av_next_option(obj, last);
-}
-FF_SYMVER(int, av_opt_show2, (void *obj, void *av_log_obj, int req_flags, int rej_flags), "LIBAVCODEC_52"){
-    return av_opt_show2(obj, av_log_obj, req_flags, rej_flags);
-}
-FF_SYMVER(void, av_opt_set_defaults, (void *s), "LIBAVCODEC_52"){
-    return av_opt_set_defaults(s);
-}
-FF_SYMVER(void, av_opt_set_defaults2, (void *s, int mask, int flags), "LIBAVCODEC_52"){
-    return av_opt_set_defaults2(s, mask, flags);
-}
-#endif
-
-#if FF_API_SET_STRING_OLD
-const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc){
-    const AVOption *o;
-    if (av_set_string3(obj, name, val, alloc, &o) < 0)
-        return NULL;
-    return o;
-}
-
-const AVOption *av_set_string(void *obj, const char *name, const char *val){
-    const AVOption *o;
-    if (av_set_string3(obj, name, val, 0, &o) < 0)
-        return NULL;
-    return o;
-}
-#endif
-
-#if FF_API_OPT_SHOW
-int av_opt_show(void *obj, void *av_log_obj){
-    return av_opt_show2(obj, av_log_obj,
-                        AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM, 0);
-}
-#endif
diff --git a/libavcodec/opt.h b/libavcodec/opt.h
deleted file mode 100644
index 95147595b7..0000000000
--- a/libavcodec/opt.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * AVOptions
- * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef AVCODEC_OPT_H
-#define AVCODEC_OPT_H
-
-/**
- * @file
- * AVOptions
- */
-
-#include "libavutil/rational.h"
-#include "avcodec.h"
-#include "libavutil/opt.h"
-
-#if FF_API_SET_STRING_OLD
-/**
- * @see av_set_string2()
- */
-attribute_deprecated const AVOption *av_set_string(void *obj, const char *name, const char *val);
-
-/**
- * @return a pointer to the AVOption corresponding to the field set or
- * NULL if no matching AVOption exists, or if the value val is not
- * valid
- * @see av_set_string3()
- */
-attribute_deprecated const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc);
-#endif
-#if FF_API_OPT_SHOW
-/**
- * @deprecated Use av_opt_show2() instead.
- */
-attribute_deprecated int av_opt_show(void *obj, void *av_log_obj);
-#endif
-
-#endif /* AVCODEC_OPT_H */
diff --git a/libavcodec/options.c b/libavcodec/options.c
index c749f437d7..2c395510a8 100644
--- a/libavcodec/options.c
+++ b/libavcodec/options.c
@@ -113,9 +113,6 @@ static const AVOption options[]={
 {"cutoff", "set cutoff bandwidth", OFFSET(cutoff), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},
 {"frame_size", NULL, OFFSET(frame_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},
 {"frame_number", NULL, OFFSET(frame_number), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
-#if LIBAVCODEC_VERSION_MAJOR < 53
-{"real_pict_num", NULL, OFFSET(real_pict_num), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
-#endif
 {"delay", NULL, OFFSET(delay), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 {"qcomp", "video quantizer scale compression (VBR)", OFFSET(qcompress), FF_OPT_TYPE_FLOAT, 0.5, -FLT_MAX, FLT_MAX, V|E},
 {"qblur", "video quantizer scale blur (VBR)", OFFSET(qblur), FF_OPT_TYPE_FLOAT, 0.5, 0, FLT_MAX, V|E},
@@ -164,9 +161,6 @@ static const AVOption options[]={
 {"very", "strictly conform to a older more strict version of the spec or reference software", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_VERY_STRICT, INT_MIN, INT_MAX, V|D|E, "strict"},
 {"strict", "strictly conform to all the things in the spec no matter what consequences", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_STRICT, INT_MIN, INT_MAX, V|D|E, "strict"},
 {"normal", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_NORMAL, INT_MIN, INT_MAX, V|D|E, "strict"},
-#if FF_API_INOFFICIAL
-{"inofficial", "allow unofficial extensions (deprecated - use unofficial)", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_UNOFFICIAL, INT_MIN, INT_MAX, V|D|E, "strict"},
-#endif
 {"unofficial", "allow unofficial extensions", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_UNOFFICIAL, INT_MIN, INT_MAX, V|D|E, "strict"},
 {"experimental", "allow non standardized experimental things", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_EXPERIMENTAL, INT_MIN, INT_MAX, V|D|E, "strict"},
 {"b_qoffset", "qp offset between P and B frames", OFFSET(b_quant_offset), FF_OPT_TYPE_FLOAT, 1.25, -FLT_MAX, FLT_MAX, V|E},
@@ -396,9 +390,6 @@ static const AVOption options[]={
 {"ivlc", "intra vlc table", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_INTRA_VLC, INT_MIN, INT_MAX, V|E, "flags2"},
 {"b_sensitivity", "adjusts sensitivity of b_frame_strategy 1", OFFSET(b_sensitivity), FF_OPT_TYPE_INT, 40, 1, INT_MAX, V|E},
 {"compression_level", NULL, OFFSET(compression_level), FF_OPT_TYPE_INT, FF_COMPRESSION_DEFAULT, INT_MIN, INT_MAX, V|A|E},
-#if FF_API_USE_LPC
-{"use_lpc", "sets whether to use LPC mode (FLAC)", OFFSET(use_lpc), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
-#endif
 {"lpc_coeff_precision", "LPC coefficient precision (FLAC)", OFFSET(lpc_coeff_precision), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|E},
 {"min_prediction_order", NULL, OFFSET(min_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 {"max_prediction_order", NULL, OFFSET(max_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
diff --git a/libavcodec/parser.c b/libavcodec/parser.c
index 34659b7b2f..c1c8ce22ca 100644
--- a/libavcodec/parser.c
+++ b/libavcodec/parser.c
@@ -105,43 +105,6 @@ void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove){
     }
 }
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-/**
- *
- * @param buf           input
- * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output)
- * @param pts           input presentation timestamp
- * @param dts           input decoding timestamp
- * @param poutbuf       will contain a pointer to the first byte of the output frame
- * @param poutbuf_size  will contain the length of the output frame
- * @return the number of bytes of the input bitstream used
- *
- * Example:
- * @code
- *   while(in_len){
- *       len = av_parser_parse(myparser, AVCodecContext, &data, &size,
- *                                       in_data, in_len,
- *                                       pts, dts);
- *       in_data += len;
- *       in_len  -= len;
- *
- *       if(size)
- *          decode_frame(data, size);
- *   }
- * @endcode
- *
- * @deprecated Use av_parser_parse2() instead.
- */
-int av_parser_parse(AVCodecParserContext *s,
-                    AVCodecContext *avctx,
-                    uint8_t **poutbuf, int *poutbuf_size,
-                    const uint8_t *buf, int buf_size,
-                    int64_t pts, int64_t dts)
-{
-    return av_parser_parse2(s, avctx, poutbuf, poutbuf_size, buf, buf_size, pts, dts, AV_NOPTS_VALUE);
-}
-#endif
-
 int av_parser_parse2(AVCodecParserContext *s,
                      AVCodecContext *avctx,
                      uint8_t **poutbuf, int *poutbuf_size,
diff --git a/libavcodec/pcm.c b/libavcodec/pcm.c
index cdc11f80d0..111ce6193f 100644
--- a/libavcodec/pcm.c
+++ b/libavcodec/pcm.c
@@ -71,7 +71,7 @@ static av_cold int pcm_encode_close(AVCodecContext *avctx)
  * @param offset Sample value offset
  */
 #define ENCODE(type, endian, src, dst, n, shift, offset) \
-    samples_##type = (type*)src; \
+    samples_##type = (const type*) src; \
     for(;n>0;n--) { \
         register type v = (*samples_##type++ >> shift) + offset; \
         bytestream_put_##endian(&dst, v); \
diff --git a/libavcodec/resample.c b/libavcodec/resample.c
index ed2b31bd31..d3c12f6354 100644
--- a/libavcodec/resample.c
+++ b/libavcodec/resample.c
@@ -218,17 +218,6 @@ ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
     return s;
 }
 
-#if FF_API_AUDIO_OLD
-ReSampleContext *audio_resample_init(int output_channels, int input_channels,
-                                     int output_rate, int input_rate)
-{
-    return av_audio_resample_init(output_channels, input_channels,
-                                  output_rate, input_rate,
-                                  AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16,
-                                  TAPS, 10, 0, 0.8);
-}
-#endif
-
 /* resample audio. 'nb_samples' is the number of input samples */
 /* XXX: optimize it ! */
 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples)
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index a6fb871ade..47b752a794 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -48,7 +48,7 @@ static int volatile entangled_thread_counter=0;
 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
 static void *codec_mutex;
 
-void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size)
+void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
 {
     if(min_size < *size)
         return ptr;
@@ -64,7 +64,7 @@ void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_s
     return ptr;
 }
 
-void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size)
+void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
 {
     void **p = ptr;
     if (min_size < *size)
@@ -94,13 +94,6 @@ void avcodec_register(AVCodec *codec)
     codec->next = NULL;
 }
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-void register_avcodec(AVCodec *codec)
-{
-    avcodec_register(codec);
-}
-#endif
-
 unsigned avcodec_get_edge_width(void)
 {
     return EDGE_WIDTH;
@@ -224,12 +217,6 @@ void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
     *width=FFALIGN(*width, align);
 }
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
-    return av_image_check_size(w, h, 0, av_log_ctx);
-}
-#endif
-
 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
     int i;
     int w= s->width;
@@ -482,7 +469,7 @@ static void avcodec_get_subtitle_defaults(AVSubtitle *sub)
 
 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 {
-    int ret= -1;
+    int ret = 0;
 
     /* If there is a user-supplied mutex locking routine, call it. */
     if (ff_lockmgr_cb) {
@@ -493,11 +480,14 @@ int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
     entangled_thread_counter++;
     if(entangled_thread_counter != 1){
         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
+        ret = -1;
         goto end;
     }
 
-    if(avctx->codec || !codec)
+    if(avctx->codec || !codec) {
+        ret = AVERROR(EINVAL);
         goto end;
+    }
 
     if (codec->priv_data_size > 0) {
       if(!avctx->priv_data){
@@ -547,6 +537,7 @@ int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
     if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
                            && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
         av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
+        ret = AVERROR(EINVAL);
         goto free_and_end;
     }
     avctx->frame_number = 0;
@@ -561,6 +552,7 @@ int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
     if (avctx->codec->max_lowres < avctx->lowres) {
         av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
                avctx->codec->max_lowres);
+        ret = AVERROR(EINVAL);
         goto free_and_end;
     }
     if (avctx->codec->sample_fmts && avctx->codec->encode) {
@@ -570,6 +562,7 @@ int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
                 break;
         if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
             av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
+            ret = AVERROR(EINVAL);
             goto free_and_end;
         }
     }
@@ -736,20 +729,6 @@ int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *pi
     return ret;
 }
 
-#if FF_API_AUDIO_OLD
-int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
-                         int *frame_size_ptr,
-                         const uint8_t *buf, int buf_size)
-{
-    AVPacket avpkt;
-    av_init_packet(&avpkt);
-    avpkt.data = buf;
-    avpkt.size = buf_size;
-
-    return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
-}
-#endif
-
 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
                          int *frame_size_ptr,
                          AVPacket *avpkt)
@@ -779,20 +758,6 @@ int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *sa
     return ret;
 }
 
-#if FF_API_SUBTITLE_OLD
-int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
-                            int *got_sub_ptr,
-                            const uint8_t *buf, int buf_size)
-{
-    AVPacket avpkt;
-    av_init_packet(&avpkt);
-    avpkt.data = buf;
-    avpkt.size = buf_size;
-
-    return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
-}
-#endif
-
 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
                             int *got_sub_ptr,
                             AVPacket *avpkt)
@@ -1225,20 +1190,6 @@ unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
     return n;
 }
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-#include "libavutil/parseutils.h"
-
-int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
-{
-    return av_parse_video_size(width_ptr, height_ptr, str);
-}
-
-int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
-{
-    return av_parse_video_rate(frame_rate, arg);
-}
-#endif
-
 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
     int i;
     for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
@@ -1344,20 +1295,3 @@ void ff_thread_await_progress(AVFrame *f, int progress, int field)
 }
 
 #endif
-
-#if LIBAVCODEC_VERSION_MAJOR < 53
-
-int avcodec_thread_init(AVCodecContext *s, int thread_count)
-{
-    s->thread_count = thread_count;
-    return ff_thread_init(s);
-}
-
-void avcodec_thread_free(AVCodecContext *s)
-{
-#if HAVE_THREADS
-    ff_thread_free(s);
-#endif
-}
-
-#endif
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 4abdd5a070..5e88f10b99 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -20,8 +20,8 @@
 #ifndef AVCODEC_VERSION_H
 #define AVCODEC_VERSION_H
 
-#define LIBAVCODEC_VERSION_MAJOR 52
-#define LIBAVCODEC_VERSION_MINOR 120
+#define LIBAVCODEC_VERSION_MAJOR 53
+#define LIBAVCODEC_VERSION_MINOR  0
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
@@ -41,30 +41,6 @@
 #ifndef FF_API_PALETTE_CONTROL
 #define FF_API_PALETTE_CONTROL  (LIBAVCODEC_VERSION_MAJOR < 54)
 #endif
-#ifndef FF_API_MM_FLAGS
-#define FF_API_MM_FLAGS         (LIBAVCODEC_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_OPT_SHOW
-#define FF_API_OPT_SHOW         (LIBAVCODEC_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_AUDIO_OLD
-#define FF_API_AUDIO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_VIDEO_OLD
-#define FF_API_VIDEO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_SUBTITLE_OLD
-#define FF_API_SUBTITLE_OLD     (LIBAVCODEC_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_USE_LPC
-#define FF_API_USE_LPC          (LIBAVCODEC_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_SET_STRING_OLD
-#define FF_API_SET_STRING_OLD   (LIBAVCODEC_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_INOFFICIAL
-#define FF_API_INOFFICIAL       (LIBAVCODEC_VERSION_MAJOR < 53)
-#endif
 #ifndef FF_API_OLD_SAMPLE_FMT
 #define FF_API_OLD_SAMPLE_FMT   (LIBAVCODEC_VERSION_MAJOR < 54)
 #endif
diff --git a/libavcodec/xvmc.h b/libavcodec/xvmc.h
index 29c010bff9..93ad8bb9a5 100644
--- a/libavcodec/xvmc.h
+++ b/libavcodec/xvmc.h
@@ -25,11 +25,6 @@
 
 #include "avcodec.h"
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
-#define AV_XVMC_STATE_DISPLAY_PENDING          1  /**  the surface should be shown, the video driver manipulates this */
-#define AV_XVMC_STATE_PREDICTION               2  /**  the surface is needed for prediction, the codec manipulates this */
-#define AV_XVMC_STATE_OSD_SOURCE               4  /**  the surface is needed for subpicture rendering */
-#endif
 #define AV_XVMC_ID                    0x1DC711C0  /**< special value to ensure that regular pixel routines haven't corrupted the struct
                                                        the number is 1337 speak for the letters IDCT MCo (motion compensation) */
 
@@ -151,22 +146,6 @@ struct xvmc_pix_fmt {
                         of coded blocks it contains.
     */
     int             next_free_data_block_num;
-
-/** extensions may be placed here */
-#if LIBAVCODEC_VERSION_MAJOR < 53
-//@{
-    /** State flags used to work around limitations in the MPlayer video system.
-        0   - Surface is not used.
-        1   - Surface is still held in application to be displayed or is
-              still visible.
-        2   - Surface is still held in libavcodec buffer for prediction.
-    */
-    int             state;
-
-    /** pointer to the surface where the subpicture is rendered */
-    void*           p_osd_target_surface_render;
-//}@
-#endif
 };
 
 #endif /* AVCODEC_XVMC_H */
diff --git a/libavdevice/avdevice.h b/libavdevice/avdevice.h
index 0c29c7b975..d31c99e654 100644
--- a/libavdevice/avdevice.h
+++ b/libavdevice/avdevice.h
@@ -21,8 +21,8 @@
 
 #include "libavutil/avutil.h"
 
-#define LIBAVDEVICE_VERSION_MAJOR 52
-#define LIBAVDEVICE_VERSION_MINOR  4
+#define LIBAVDEVICE_VERSION_MAJOR 53
+#define LIBAVDEVICE_VERSION_MINOR  0
 #define LIBAVDEVICE_VERSION_MICRO  0
 
 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index f7c85daed3..6525f57281 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -25,9 +25,9 @@
 #include "libavutil/avutil.h"
 #include "libavutil/samplefmt.h"
 
-#define LIBAVFILTER_VERSION_MAJOR  1
-#define LIBAVFILTER_VERSION_MINOR 79
-#define LIBAVFILTER_VERSION_MICRO  1
+#define LIBAVFILTER_VERSION_MAJOR  2
+#define LIBAVFILTER_VERSION_MINOR  0
+#define LIBAVFILTER_VERSION_MICRO  0
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 20b50920a4..45871721b6 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -10,7 +10,6 @@ OBJS = allformats.o         \
        id3v1.o              \
        id3v2.o              \
        metadata.o           \
-       metadata_compat.o    \
        options.o            \
        os_support.o         \
        sdp.o                \
diff --git a/libavformat/applehttp.c b/libavformat/applehttp.c
index 7e6d2d79e5..2b22cd401b 100644
--- a/libavformat/applehttp.c
+++ b/libavformat/applehttp.c
@@ -170,7 +170,7 @@ static int parse_playlist(AppleHTTPContext *c, const char *url,
 
     if (!in) {
         close_in = 1;
-        if ((ret = avio_open(&in, url, AVIO_RDONLY)) < 0)
+        if ((ret = avio_open(&in, url, AVIO_FLAG_READ)) < 0)
             return ret;
     }
 
@@ -293,7 +293,7 @@ reload:
 
         ret = ffurl_open(&v->input,
                          v->segments[v->cur_seq_no - v->start_seq_no]->url,
-                         AVIO_RDONLY);
+                         AVIO_FLAG_READ);
         if (ret < 0)
             return ret;
     }
diff --git a/libavformat/applehttpproto.c b/libavformat/applehttpproto.c
index 4871cccd71..f908584bf1 100644
--- a/libavformat/applehttpproto.c
+++ b/libavformat/applehttpproto.c
@@ -115,7 +115,7 @@ static int parse_playlist(URLContext *h, const char *url)
     char line[1024];
     const char *ptr;
 
-    if ((ret = avio_open(&in, url, AVIO_RDONLY)) < 0)
+    if ((ret = avio_open(&in, url, AVIO_FLAG_READ)) < 0)
         return ret;
 
     read_chomp_line(in, line, sizeof(line));
@@ -180,7 +180,7 @@ static int applehttp_open(URLContext *h, const char *uri, int flags)
     int ret, i;
     const char *nested_url;
 
-    if (flags & (AVIO_WRONLY | AVIO_RDWR))
+    if (flags & AVIO_FLAG_WRITE)
         return AVERROR(ENOSYS);
 
     s = av_mallocz(sizeof(AppleHTTPContext));
@@ -275,7 +275,7 @@ retry:
     }
     url = s->segments[s->cur_seq_no - s->start_seq_no]->url,
     av_log(NULL, AV_LOG_DEBUG, "opening %s\n", url);
-    ret = ffurl_open(&s->seg_hd, url, AVIO_RDONLY);
+    ret = ffurl_open(&s->seg_hd, url, AVIO_FLAG_READ);
     if (ret < 0) {
         if (url_interrupt_cb())
             return AVERROR_EXIT;
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 423b135039..c3c3de8362 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -133,20 +133,6 @@ typedef struct AVMetadataConv AVMetadataConv;
 AVMetadataTag *
 av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags);
 
-#if FF_API_OLD_METADATA
-/**
- * Set the given tag in *pm, overwriting an existing tag.
- *
- * @param pm pointer to a pointer to a metadata struct. If *pm is NULL
- * a metadata struct is allocated and put in *pm.
- * @param key tag key to add to *pm (will be av_strduped)
- * @param value tag value to add to *pm (will be av_strduped)
- * @return >= 0 on success otherwise an error code <0
- * @deprecated Use av_metadata_set2() instead.
- */
-attribute_deprecated int av_metadata_set(AVMetadata **pm, const char *key, const char *value);
-#endif
-
 /**
  * Set the given tag in *pm, overwriting an existing tag.
  *
@@ -256,10 +242,6 @@ typedef struct AVFormatParameters {
     unsigned int initial_pause:1;       /**< Do not begin to play the stream
                                             immediately (RTSP only). */
     unsigned int prealloced_context:1;
-#if FF_API_PARAMETERS_CODEC_ID
-    attribute_deprecated enum CodecID video_codec_id;
-    attribute_deprecated enum CodecID audio_codec_id;
-#endif
 } AVFormatParameters;
 
 //! Demuxer will use avio_open, no opened file should be provided by the caller.
@@ -546,10 +528,6 @@ typedef struct AVStream {
      */
     int64_t duration;
 
-#if FF_API_OLD_METADATA
-    attribute_deprecated char language[4]; /**< ISO 639-2/B 3-letter language code (empty string if undefined) */
-#endif
-
     /* av_read_frame() support */
     enum AVStreamParseType need_parsing;
     struct AVCodecParserContext *parser;
@@ -565,14 +543,6 @@ typedef struct AVStream {
 
     int64_t nb_frames;                 ///< number of frames in this stream if known or 0
 
-#if FF_API_LAVF_UNUSED
-    attribute_deprecated int64_t unused[4+1];
-#endif
-
-#if FF_API_OLD_METADATA
-    attribute_deprecated char *filename; /**< source filename of the stream */
-#endif
-
     int disposition; /**< AV_DISPOSITION_* bit field */
 
     AVProbeData probe_data;
@@ -656,10 +626,6 @@ typedef struct AVStream {
  */
 typedef struct AVProgram {
     int            id;
-#if FF_API_OLD_METADATA
-    attribute_deprecated char           *provider_name; ///< network name for DVB streams
-    attribute_deprecated char           *name;          ///< service name for DVB streams
-#endif
     int            flags;
     enum AVDiscard discard;        ///< selects which program to discard and which to feed to the caller
     unsigned int   *stream_index;
@@ -674,16 +640,9 @@ typedef struct AVChapter {
     int id;                 ///< unique ID to identify the chapter
     AVRational time_base;   ///< time base in which the start/end timestamps are specified
     int64_t start, end;     ///< chapter start/end time in time_base units
-#if FF_API_OLD_METADATA
-    attribute_deprecated char *title;            ///< chapter title
-#endif
     AVMetadata *metadata;
 } AVChapter;
 
-#if FF_API_MAX_STREAMS
-#define MAX_STREAMS 20
-#endif
-
 /**
  * Format I/O context.
  * New fields can be added to the end with minor version bumps.
@@ -699,24 +658,10 @@ typedef struct AVFormatContext {
     void *priv_data;
     AVIOContext *pb;
     unsigned int nb_streams;
-#if FF_API_MAX_STREAMS
-    AVStream *streams[MAX_STREAMS];
-#else
     AVStream **streams;
-#endif
     char filename[1024]; /**< input or output filename */
     /* stream info */
     int64_t timestamp;
-#if FF_API_OLD_METADATA
-    attribute_deprecated char title[512];
-    attribute_deprecated char author[512];
-    attribute_deprecated char copyright[512];
-    attribute_deprecated char comment[512];
-    attribute_deprecated char album[512];
-    attribute_deprecated int year;  /**< ID3 year, 0 if none */
-    attribute_deprecated int track; /**< track number, 0 if none */
-    attribute_deprecated char genre[32]; /**< ID3 genre */
-#endif
 
     int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
     /* private data for pts handling (do not modify directly). */
@@ -756,17 +701,9 @@ typedef struct AVFormatContext {
 
     /* av_read_frame() support */
     AVStream *cur_st;
-#if FF_API_LAVF_UNUSED
-    const uint8_t *cur_ptr_deprecated;
-    int cur_len_deprecated;
-    AVPacket cur_pkt_deprecated;
-#endif
 
     /* av_seek_frame() support */
     int64_t data_offset; /**< offset of the first packet */
-#if FF_API_INDEX_BUILT
-    attribute_deprecated int index_built;
-#endif
 
     int mux_rate;
     unsigned int packet_size;
@@ -888,11 +825,6 @@ typedef struct AVPacketList {
     struct AVPacketList *next;
 } AVPacketList;
 
-#if FF_API_FIRST_FORMAT
-attribute_deprecated extern AVInputFormat *first_iformat;
-attribute_deprecated extern AVOutputFormat *first_oformat;
-#endif
-
 /**
  * If f is NULL, returns the first registered input format,
  * if f is non-NULL, returns the next registered input format after f
@@ -917,18 +849,6 @@ attribute_deprecated enum CodecID av_guess_image2_codec(const char *filename);
 /* utils.c */
 void av_register_input_format(AVInputFormat *format);
 void av_register_output_format(AVOutputFormat *format);
-#if FF_API_GUESS_FORMAT
-attribute_deprecated AVOutputFormat *guess_stream_format(const char *short_name,
-                                    const char *filename,
-                                    const char *mime_type);
-
-/**
- * @deprecated Use av_guess_format() instead.
- */
-attribute_deprecated AVOutputFormat *guess_format(const char *short_name,
-                                                  const char *filename,
-                                                  const char *mime_type);
-#endif
 
 /**
  * Return the output format in the list of registered output formats
@@ -1119,13 +1039,6 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
                        int buf_size,
                        AVFormatParameters *ap);
 
-#if FF_API_ALLOC_FORMAT_CONTEXT
-/**
- * @deprecated Use avformat_alloc_context() instead.
- */
-attribute_deprecated AVFormatContext *av_alloc_format_context(void);
-#endif
-
 /**
  * Allocate an AVFormatContext.
  * avformat_free_context() can be used to free the context and everything
@@ -1492,22 +1405,6 @@ void av_dump_format(AVFormatContext *ic,
                     const char *url,
                     int is_output);
 
-#if FF_API_PARSE_FRAME_PARAM
-/**
- * Parse width and height out of string str.
- * @deprecated Use av_parse_video_frame_size instead.
- */
-attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr,
-                                          const char *str);
-
-/**
- * Convert framerate from a string to a fraction.
- * @deprecated Use av_parse_video_frame_rate instead.
- */
-attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
-                                          const char *arg);
-#endif
-
 #if FF_API_PARSE_DATE
 /**
  * Parse datestr and return a corresponding number of microseconds.
diff --git a/libavformat/avio.c b/libavformat/avio.c
index 725a95f768..0a09cf1c44 100644
--- a/libavformat/avio.c
+++ b/libavformat/avio.c
@@ -31,7 +31,6 @@
 #endif
 #include "url.h"
 
-#if FF_API_URL_CLASS
 /** @name Logging context. */
 /*@{*/
 static const char *urlcontext_to_name(void *ptr)
@@ -44,7 +43,6 @@ static const AVOption options[] = {{NULL}};
 static const AVClass urlcontext_class =
         { "URLContext", urlcontext_to_name, options, LIBAVUTIL_VERSION_INT };
 /*@}*/
-#endif
 
 static int default_interrupt_cb(void);
 
@@ -82,29 +80,6 @@ int ffurl_register_protocol(URLProtocol *protocol, int size)
     return 0;
 }
 
-#if FF_API_REGISTER_PROTOCOL
-/* The layout of URLProtocol as of when major was bumped to 52 */
-struct URLProtocol_compat {
-    const char *name;
-    int (*url_open)(URLContext *h, const char *filename, int flags);
-    int (*url_read)(URLContext *h, unsigned char *buf, int size);
-    int (*url_write)(URLContext *h, unsigned char *buf, int size);
-    int64_t (*url_seek)(URLContext *h, int64_t pos, int whence);
-    int (*url_close)(URLContext *h);
-    struct URLProtocol *next;
-};
-
-int av_register_protocol(URLProtocol *protocol)
-{
-    return ffurl_register_protocol(protocol, sizeof(struct URLProtocol_compat));
-}
-
-int register_protocol(URLProtocol *protocol)
-{
-    return ffurl_register_protocol(protocol, sizeof(struct URLProtocol_compat));
-}
-#endif
-
 static int url_alloc_for_protocol (URLContext **puc, struct URLProtocol *up,
                                    const char *filename, int flags)
 {
@@ -120,9 +95,7 @@ static int url_alloc_for_protocol (URLContext **puc, struct URLProtocol *up,
         err = AVERROR(ENOMEM);
         goto fail;
     }
-#if FF_API_URL_CLASS
     uc->av_class = &urlcontext_class;
-#endif
     uc->filename = (char *) &uc[1];
     strcpy(uc->filename, filename);
     uc->prot = up;
@@ -154,7 +127,7 @@ int ffurl_connect(URLContext* uc)
         return err;
     uc->is_connected = 1;
     //We must be careful here as ffurl_seek() could be slow, for example for http
-    if(   (uc->flags & (AVIO_WRONLY | AVIO_RDWR))
+    if(   (uc->flags & AVIO_FLAG_WRITE)
        || !strcmp(uc->prot->name, "file"))
         if(!uc->is_streamed && ffurl_seek(uc, 0, SEEK_SET) < 0)
             uc->is_streamed= 1;
@@ -314,21 +287,21 @@ static inline int retry_transfer_wrapper(URLContext *h, unsigned char *buf, int
 
 int ffurl_read(URLContext *h, unsigned char *buf, int size)
 {
-    if (h->flags & AVIO_WRONLY)
+    if (h->flags & AVIO_FLAG_WRITE)
         return AVERROR(EIO);
     return retry_transfer_wrapper(h, buf, size, 1, h->prot->url_read);
 }
 
 int ffurl_read_complete(URLContext *h, unsigned char *buf, int size)
 {
-    if (h->flags & AVIO_WRONLY)
+    if (h->flags & AVIO_FLAG_WRITE)
         return AVERROR(EIO);
     return retry_transfer_wrapper(h, buf, size, size, h->prot->url_read);
 }
 
 int ffurl_write(URLContext *h, const unsigned char *buf, int size)
 {
-    if (!(h->flags & (AVIO_WRONLY | AVIO_RDWR)))
+    if (!(h->flags & AVIO_FLAG_WRITE))
         return AVERROR(EIO);
     /* avoid sending too big packets */
     if (h->max_packet_size && size > h->max_packet_size)
@@ -367,7 +340,7 @@ int ffurl_close(URLContext *h)
 int url_exist(const char *filename)
 {
     URLContext *h;
-    if (ffurl_open(&h, filename, AVIO_RDONLY) < 0)
+    if (ffurl_open(&h, filename, AVIO_FLAG_READ) < 0)
         return 0;
     ffurl_close(h);
     return 1;
diff --git a/libavformat/avio.h b/libavformat/avio.h
index 9d805822d4..ba4fc2351b 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -101,9 +101,7 @@ typedef struct {
  * @deprecated This struct will be made private
  */
 typedef struct URLContext {
-#if FF_API_URL_CLASS
     const AVClass *av_class; ///< information for av_log(). Set by url_open().
-#endif
     struct URLProtocol *prot;
     int flags;
     int is_streamed;  /**< true if streamed (no seek possible), default = false */
@@ -346,7 +344,7 @@ attribute_deprecated int url_exist(const char *url);
 #endif // FF_API_OLD_AVIO
 
 /**
- * Return AVIO_* access flags corresponding to the access permissions
+ * Return AVIO_FLAG_* access flags corresponding to the access permissions
  * of the resource in url, or a negative value corresponding to an
  * AVERROR code in case of failure. The returned access flags are
  * masked by the value in flags.
@@ -356,9 +354,6 @@ attribute_deprecated int url_exist(const char *url);
  * one call to another. Thus you should not trust the returned value,
  * unless you are sure that no other processes are accessing the
  * checked resource.
- *
- * @note This function is slightly broken until next major bump
- *       because of AVIO_RDONLY == 0. Don't use it until then.
  */
 int avio_check(const char *url, int flags);
 
@@ -370,22 +365,6 @@ int avio_check(const char *url, int flags);
  */
 void avio_set_interrupt_cb(int (*interrupt_cb)(void));
 
-#if FF_API_REGISTER_PROTOCOL
-extern URLProtocol *first_protocol;
-#endif
-
-#if FF_API_REGISTER_PROTOCOL
-/**
- * @deprecated Use av_register_protocol() instead.
- */
-attribute_deprecated int register_protocol(URLProtocol *protocol);
-
-/**
- * @deprecated Use av_register_protocol2() instead.
- */
-attribute_deprecated int av_register_protocol(URLProtocol *protocol);
-#endif
-
 /**
  * Allocate and initialize an AVIOContext for buffered I/O. It must be later
  * freed with av_free().
@@ -542,29 +521,15 @@ int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen);
 int avio_get_str16be(AVIOContext *pb, int maxlen, char *buf, int buflen);
 
 
-#if FF_API_URL_RESETBUF
-/** Reset the buffer for reading or writing.
- * @note Will drop any data currently in the buffer without transmitting it.
- * @param flags URL_RDONLY to set up the buffer for reading, or URL_WRONLY
- *        to set up the buffer for writing. */
-int url_resetbuf(AVIOContext *s, int flags);
-#endif
-
 /**
  * @defgroup open_modes URL open modes
  * The flags argument to avio_open must be one of the following
  * constants, optionally ORed with other flags.
  * @{
  */
-#if LIBAVFORMAT_VERSION_MAJOR < 53
-#define AVIO_RDONLY 0  /**< read-only */
-#define AVIO_WRONLY 1  /**< write-only */
-#define AVIO_RDWR   2  /**< read-write */
-#else
-#define AVIO_RDONLY 1  /**< read-only */
-#define AVIO_WRONLY 2  /**< write-only */
-#define AVIO_RDWR   4  /**< read-write */
-#endif
+#define AVIO_FLAG_READ  1                                      /**< read-only */
+#define AVIO_FLAG_WRITE 2                                      /**< write-only */
+#define AVIO_FLAG_READ_WRITE (AVIO_FLAG_READ|AVIO_FLAG_WRITE)  /**< read-write pseudo flag */
 /**
  * @}
  */
@@ -581,11 +546,7 @@ int url_resetbuf(AVIOContext *s, int flags);
  * Warning: non-blocking protocols is work-in-progress; this flag may be
  * silently ignored.
  */
-#if LIBAVFORMAT_VERSION_MAJOR < 53
-#define AVIO_FLAG_NONBLOCK 4
-#else
 #define AVIO_FLAG_NONBLOCK 8
-#endif
 
 /**
  * Create and initialize a AVIOContext for accessing the
@@ -629,10 +590,6 @@ int avio_open_dyn_buf(AVIOContext **s);
  */
 int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer);
 
-#if FF_API_UDP_GET_FILE
-int udp_get_file_handle(URLContext *h);
-#endif
-
 /**
  * Iterate through names of available protocols.
  * @note it is recommanded to use av_protocol_next() instead of this
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index 70084e9323..71406e0523 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -38,9 +38,7 @@
 #define SHORT_SEEK_THRESHOLD 4096
 
 static void fill_buffer(AVIOContext *s);
-#if !FF_API_URL_RESETBUF
 static int url_resetbuf(AVIOContext *s, int flags);
-#endif
 
 int ffio_init_context(AVIOContext *s,
                   unsigned char *buffer,
@@ -55,7 +53,7 @@ int ffio_init_context(AVIOContext *s,
     s->buffer_size = buffer_size;
     s->buf_ptr = buffer;
     s->opaque = opaque;
-    url_resetbuf(s, write_flag ? AVIO_WRONLY : AVIO_RDONLY);
+    url_resetbuf(s, write_flag ? AVIO_FLAG_WRITE : AVIO_FLAG_READ);
     s->write_packet = write_packet;
     s->read_packet = read_packet;
     s->seek = seek;
@@ -854,7 +852,7 @@ int ffio_fdopen(AVIOContext **s, URLContext *h)
     }
 
     if (ffio_init_context(*s, buffer, buffer_size,
-                      (h->flags & AVIO_WRONLY || h->flags & AVIO_RDWR), h,
+                      h->flags & AVIO_FLAG_WRITE, h,
                       ffurl_read, ffurl_write, ffurl_seek) < 0) {
         av_free(buffer);
         av_freep(s);
@@ -883,24 +881,15 @@ int ffio_set_buf_size(AVIOContext *s, int buf_size)
     s->buffer = buffer;
     s->buffer_size = buf_size;
     s->buf_ptr = buffer;
-    url_resetbuf(s, s->write_flag ? AVIO_WRONLY : AVIO_RDONLY);
+    url_resetbuf(s, s->write_flag ? AVIO_FLAG_WRITE : AVIO_FLAG_READ);
     return 0;
 }
 
-#if FF_API_URL_RESETBUF
-int url_resetbuf(AVIOContext *s, int flags)
-#else
 static int url_resetbuf(AVIOContext *s, int flags)
-#endif
 {
-#if FF_API_URL_RESETBUF
-    if (flags & AVIO_RDWR)
-        return AVERROR(EINVAL);
-#else
-    assert(flags == AVIO_WRONLY || flags == AVIO_RDONLY);
-#endif
+    assert(flags == AVIO_FLAG_WRITE || flags == AVIO_FLAG_READ);
 
-    if (flags & AVIO_WRONLY) {
+    if (flags & AVIO_FLAG_WRITE) {
         s->buf_end = s->buffer + s->buffer_size;
         s->write_flag = 1;
     } else {
@@ -1058,7 +1047,7 @@ int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags)
     if(!*s)
         return AVERROR(ENOMEM);
     ret = ffio_init_context(*s, buf, buf_size,
-                        (flags & AVIO_WRONLY || flags & AVIO_RDWR),
+                            flags & AVIO_FLAG_WRITE,
                         NULL, NULL, NULL, NULL);
     if(ret != 0)
         av_freep(s);
diff --git a/libavformat/file.c b/libavformat/file.c
index 9d28a89327..fc8d174119 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -60,9 +60,9 @@ static int file_open(URLContext *h, const char *filename, int flags)
 
     av_strstart(filename, "file:", &filename);
 
-    if (flags & AVIO_RDWR) {
+    if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
         access = O_CREAT | O_TRUNC | O_RDWR;
-    } else if (flags & AVIO_WRONLY) {
+    } else if (flags & AVIO_FLAG_WRITE) {
         access = O_CREAT | O_TRUNC | O_WRONLY;
     } else {
         access = O_RDONLY;
@@ -102,9 +102,8 @@ static int file_check(URLContext *h, int mask)
     if (ret < 0)
         return AVERROR(errno);
 
-    ret |= st.st_mode&S_IRUSR ? mask&AVIO_RDONLY : 0;
-    ret |= st.st_mode&S_IWUSR ? mask&AVIO_WRONLY : 0;
-    ret |= st.st_mode&S_IWUSR && st.st_mode&S_IRUSR ? mask&AVIO_RDWR : 0;
+    ret |= st.st_mode&S_IRUSR ? mask&AVIO_FLAG_READ  : 0;
+    ret |= st.st_mode&S_IWUSR ? mask&AVIO_FLAG_WRITE : 0;
 
     return ret;
 }
@@ -132,7 +131,7 @@ static int pipe_open(URLContext *h, const char *filename, int flags)
 
     fd = strtol(filename, &final, 10);
     if((filename == final) || *final ) {/* No digits found, or something like 10ab */
-        if (flags & AVIO_WRONLY) {
+        if (flags & AVIO_FLAG_WRITE) {
             fd = 1;
         } else {
             fd = 0;
diff --git a/libavformat/gopher.c b/libavformat/gopher.c
index 3ab7357e56..282f985151 100644
--- a/libavformat/gopher.c
+++ b/libavformat/gopher.c
@@ -100,7 +100,7 @@ static int gopher_open(URLContext *h, const char *uri, int flags)
     ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
 
     s->hd = NULL;
-    err = ffurl_open(&s->hd, buf, AVIO_RDWR);
+    err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE);
     if (err < 0)
         goto fail;
 
diff --git a/libavformat/http.c b/libavformat/http.c
index 086a19ff81..ccfdc521a0 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -124,7 +124,7 @@ static int http_open_cnx(URLContext *h)
         port = 80;
 
     ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
-    err = ffurl_open(&hd, buf, AVIO_RDWR);
+    err = ffurl_open(&hd, buf, AVIO_FLAG_READ_WRITE);
     if (err < 0)
         goto fail;
 
@@ -296,7 +296,7 @@ static int http_connect(URLContext *h, const char *path, const char *hoststr,
 
 
     /* send http header */
-    post = h->flags & AVIO_WRONLY;
+    post = h->flags & AVIO_FLAG_WRITE;
     authstr = ff_http_auth_create_response(&s->auth_state, auth, path,
                                         post ? "POST" : "GET");
 
@@ -451,7 +451,7 @@ static int http_close(URLContext *h)
     HTTPContext *s = h->priv_data;
 
     /* signal end of chunked encoding if used */
-    if ((h->flags & AVIO_WRONLY) && s->chunksize != -1) {
+    if ((h->flags & AVIO_FLAG_WRITE) && s->chunksize != -1) {
         ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
         ret = ret > 0 ? 0 : ret;
     }
diff --git a/libavformat/img2.c b/libavformat/img2.c
index 56c4b3b567..bff06018fa 100644
--- a/libavformat/img2.c
+++ b/libavformat/img2.c
@@ -133,11 +133,11 @@ static int find_image_range(int *pfirst_index, int *plast_index,
         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
             *pfirst_index =
             *plast_index = 1;
-            if(url_exist(buf))
+            if (avio_check(buf, AVIO_FLAG_READ) > 0)
                 return 0;
             return -1;
         }
-        if (url_exist(buf))
+        if (avio_check(buf, AVIO_FLAG_READ) > 0)
             break;
     }
     if (first_index == 5)
@@ -155,7 +155,7 @@ static int find_image_range(int *pfirst_index, int *plast_index,
             if (av_get_frame_filename(buf, sizeof(buf), path,
                                       last_index + range1) < 0)
                 goto fail;
-            if (!url_exist(buf))
+            if (avio_check(buf, AVIO_FLAG_READ) <= 0)
                 break;
             range = range1;
             /* just in case... */
@@ -282,7 +282,7 @@ static int read_packet(AVFormatContext *s1, AVPacket *pkt)
                                   s->path, s->img_number)<0 && s->img_number > 1)
             return AVERROR(EIO);
         for(i=0; i<3; i++){
-            if (avio_open(&f[i], filename, AVIO_RDONLY) < 0) {
+            if (avio_open(&f[i], filename, AVIO_FLAG_READ) < 0) {
                 if(i==1)
                     break;
                 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
@@ -369,7 +369,7 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
             return AVERROR(EIO);
         }
         for(i=0; i<3; i++){
-            if (avio_open(&pb[i], filename, AVIO_WRONLY) < 0) {
+            if (avio_open(&pb[i], filename, AVIO_FLAG_WRITE) < 0) {
                 av_log(s, AV_LOG_ERROR, "Could not open file : %s\n",filename);
                 return AVERROR(EIO);
             }
diff --git a/libavformat/internal.h b/libavformat/internal.h
index 20a52a6958..d78a57e2e4 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -79,18 +79,6 @@ void ff_read_frame_flush(AVFormatContext *s);
 /** Get the current time since NTP epoch in microseconds. */
 uint64_t ff_ntp_time(void);
 
-#if FF_API_URL_SPLIT
-/**
- * @deprecated use av_url_split() instead
- */
-void ff_url_split(char *proto, int proto_size,
-                  char *authorization, int authorization_size,
-                  char *hostname, int hostname_size,
-                  int *port_ptr,
-                  char *path, int path_size,
-                  const char *url);
-#endif
-
 /**
  * Assemble a URL string from components. This is the reverse operation
  * of av_url_split.
diff --git a/libavformat/librtmp.c b/libavformat/librtmp.c
index 4ada91887f..acc4503d89 100644
--- a/libavformat/librtmp.c
+++ b/libavformat/librtmp.c
@@ -94,7 +94,7 @@ static int rtmp_open(URLContext *s, const char *uri, int flags)
         goto fail;
     }
 
-    if (flags & AVIO_WRONLY)
+    if (flags & AVIO_FLAG_WRITE)
         RTMP_EnableWrite(r);
 
     if (!RTMP_Connect(r, NULL) || !RTMP_ConnectStream(r, 0)) {
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index ab67e110c2..8f9340dbdc 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1334,7 +1334,7 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
                    && track->codec_priv.data != NULL) {
             int ret;
             ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
-                          AVIO_RDONLY, NULL, NULL, NULL, NULL);
+                          AVIO_FLAG_READ, NULL, NULL, NULL, NULL);
             ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
             if (ret < 0)
                 return ret;
diff --git a/libavformat/md5proto.c b/libavformat/md5proto.c
index 35a0d31305..3f099da440 100644
--- a/libavformat/md5proto.c
+++ b/libavformat/md5proto.c
@@ -36,7 +36,7 @@ static int md5_open(URLContext *h, const char *filename, int flags)
         return -1;
     }
 
-    if (flags != AVIO_WRONLY)
+    if (!flags & AVIO_FLAG_WRITE)
         return AVERROR(EINVAL);
 
     av_md5_init(h->priv_data);
@@ -65,7 +65,7 @@ static int md5_close(URLContext *h)
     av_strstart(filename, "md5:", &filename);
 
     if (*filename) {
-        err = ffurl_open(&out, filename, AVIO_WRONLY);
+        err = ffurl_open(&out, filename, AVIO_FLAG_WRITE);
         if (err)
             return err;
         err = ffurl_write(out, buf, i*2+1);
diff --git a/libavformat/metadata.c b/libavformat/metadata.c
index 68d42fd257..74e6c8df9a 100644
--- a/libavformat/metadata.c
+++ b/libavformat/metadata.c
@@ -86,13 +86,6 @@ int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int fl
     return 0;
 }
 
-#if FF_API_OLD_METADATA
-int av_metadata_set(AVMetadata **pm, const char *key, const char *value)
-{
-    return av_metadata_set2(pm, key, value, 0);
-}
-#endif
-
 #if FF_API_OLD_METADATA2
 void av_metadata_conv(AVFormatContext *ctx, const AVMetadataConv *d_conv,
                                             const AVMetadataConv *s_conv)
diff --git a/libavformat/metadata.h b/libavformat/metadata.h
index dd9b69005c..55e1ed74d2 100644
--- a/libavformat/metadata.h
+++ b/libavformat/metadata.h
@@ -43,11 +43,6 @@ struct AVMetadataConv{
 typedef struct AVMetadataConv AVMetadataConv;
 #endif
 
-#if FF_API_OLD_METADATA
-void ff_metadata_demux_compat(AVFormatContext *s);
-void ff_metadata_mux_compat(AVFormatContext *s);
-#endif
-
 void ff_metadata_conv(AVMetadata **pm, const AVMetadataConv *d_conv,
                                        const AVMetadataConv *s_conv);
 void ff_metadata_conv_ctx(AVFormatContext *ctx, const AVMetadataConv *d_conv,
diff --git a/libavformat/metadata_compat.c b/libavformat/metadata_compat.c
deleted file mode 100644
index 19b8f59df1..0000000000
--- a/libavformat/metadata_compat.c
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright (c) 2009  Aurelien Jacobs <aurel@gnuage.org>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <strings.h>
-#include "avformat.h"
-#include "metadata.h"
-#include "libavutil/avstring.h"
-
-#if FF_API_OLD_METADATA
-
-#define SIZE_OFFSET(x) sizeof(((AVFormatContext*)0)->x),offsetof(AVFormatContext,x)
-
-static const struct {
-    const char name[16];
-    int   size;
-    int   offset;
-} compat_tab[] = {
-    { "title",           SIZE_OFFSET(title)     },
-    { "author",          SIZE_OFFSET(author)    },
-    { "copyright",       SIZE_OFFSET(copyright) },
-    { "comment",         SIZE_OFFSET(comment)   },
-    { "album",           SIZE_OFFSET(album)     },
-    { "year",            SIZE_OFFSET(year)      },
-    { "track",           SIZE_OFFSET(track)     },
-    { "genre",           SIZE_OFFSET(genre)     },
-
-    { "artist",          SIZE_OFFSET(author)    },
-    { "creator",         SIZE_OFFSET(author)    },
-    { "written_by",      SIZE_OFFSET(author)    },
-    { "lead_performer",  SIZE_OFFSET(author)    },
-    { "composer",        SIZE_OFFSET(author)    },
-    { "performer",       SIZE_OFFSET(author)    },
-    { "description",     SIZE_OFFSET(comment)   },
-    { "albumtitle",      SIZE_OFFSET(album)     },
-    { "date",            SIZE_OFFSET(year)      },
-    { "date_written",    SIZE_OFFSET(year)      },
-    { "date_released",   SIZE_OFFSET(year)      },
-    { "tracknumber",     SIZE_OFFSET(track)     },
-    { "part_number",     SIZE_OFFSET(track)     },
-};
-
-void ff_metadata_demux_compat(AVFormatContext *ctx)
-{
-    AVMetadata *m;
-    int i, j;
-
-    if ((m = ctx->metadata))
-        for (j=0; j<m->count; j++)
-            for (i=0; i<FF_ARRAY_ELEMS(compat_tab); i++)
-                if (!strcasecmp(m->elems[j].key, compat_tab[i].name)) {
-                    int *ptr = (int *)((char *)ctx+compat_tab[i].offset);
-                    if (*ptr)  continue;
-                    if (compat_tab[i].size > sizeof(int))
-                        av_strlcpy((char *)ptr, m->elems[j].value, compat_tab[i].size);
-                    else
-                        *ptr = atoi(m->elems[j].value);
-                }
-
-    for (i=0; i<ctx->nb_chapters; i++)
-        if ((m = ctx->chapters[i]->metadata))
-            for (j=0; j<m->count; j++)
-                if (!strcasecmp(m->elems[j].key, "title")) {
-                    av_free(ctx->chapters[i]->title);
-                    ctx->chapters[i]->title = av_strdup(m->elems[j].value);
-                }
-
-    for (i=0; i<ctx->nb_programs; i++)
-        if ((m = ctx->programs[i]->metadata))
-            for (j=0; j<m->count; j++) {
-                if (!strcasecmp(m->elems[j].key, "name")) {
-                    av_free(ctx->programs[i]->name);
-                    ctx->programs[i]->name = av_strdup(m->elems[j].value);
-                }
-                if (!strcasecmp(m->elems[j].key, "provider_name")) {
-                    av_free(ctx->programs[i]->provider_name);
-                    ctx->programs[i]->provider_name = av_strdup(m->elems[j].value);
-                }
-            }
-
-    for (i=0; i<ctx->nb_streams; i++)
-        if ((m = ctx->streams[i]->metadata))
-            for (j=0; j<m->count; j++) {
-                if (!strcasecmp(m->elems[j].key, "language"))
-                    av_strlcpy(ctx->streams[i]->language, m->elems[j].value, 4);
-                if (!strcasecmp(m->elems[j].key, "filename")) {
-                    av_free(ctx->streams[i]->filename);
-                    ctx->streams[i]->filename= av_strdup(m->elems[j].value);
-                }
-            }
-}
-
-
-#define FILL_METADATA(s, key, value) {                                        \
-    if (!av_metadata_get(s->metadata, #key, NULL, 0))                         \
-        av_metadata_set2(&s->metadata, #key, value, 0);                       \
-    }
-#define FILL_METADATA_STR(s, key) {                                           \
-    if (s->key && *s->key)  FILL_METADATA(s, key, s->key); }
-#define FILL_METADATA_INT(s, key) {                                           \
-    char number[10];                                                          \
-    snprintf(number, sizeof(number), "%d", s->key);                           \
-    if(s->key)  FILL_METADATA(s, key, number) }
-
-void ff_metadata_mux_compat(AVFormatContext *ctx)
-{
-    int i;
-
-    if (ctx->metadata && ctx->metadata->count > 0)
-        return;
-
-    FILL_METADATA_STR(ctx, title);
-    FILL_METADATA_STR(ctx, author);
-    FILL_METADATA_STR(ctx, copyright);
-    FILL_METADATA_STR(ctx, comment);
-    FILL_METADATA_STR(ctx, album);
-    FILL_METADATA_INT(ctx, year);
-    FILL_METADATA_INT(ctx, track);
-    FILL_METADATA_STR(ctx, genre);
-    for (i=0; i<ctx->nb_chapters; i++)
-        FILL_METADATA_STR(ctx->chapters[i], title);
-    for (i=0; i<ctx->nb_programs; i++) {
-        FILL_METADATA_STR(ctx->programs[i], name);
-        FILL_METADATA_STR(ctx->programs[i], provider_name);
-    }
-    for (i=0; i<ctx->nb_streams; i++) {
-        FILL_METADATA_STR(ctx->streams[i], language);
-        FILL_METADATA_STR(ctx->streams[i], filename);
-    }
-}
-
-#endif /* FF_API_OLD_METADATA */
diff --git a/libavformat/mms.c b/libavformat/mms.c
index b541208e31..46fbede90c 100644
--- a/libavformat/mms.c
+++ b/libavformat/mms.c
@@ -24,11 +24,7 @@
 #include "asf.h"
 #include "libavutil/intreadwrite.h"
 
-#if FF_API_MAX_STREAMS
-#define MMS_MAX_STREAMS MAX_STREAMS
-#else
 #define MMS_MAX_STREAMS 256    /**< arbitrary sanity check value */
-#endif
 
 int ff_mms_read_header(MMSContext *mms, uint8_t *buf, const int size)
 {
diff --git a/libavformat/mmsh.c b/libavformat/mmsh.c
index 70664b9776..6ab8a7e4f2 100644
--- a/libavformat/mmsh.c
+++ b/libavformat/mmsh.c
@@ -233,7 +233,7 @@ static int mmsh_open(URLContext *h, const char *uri, int flags)
         port = 80; // default mmsh protocol port
     ff_url_join(httpname, sizeof(httpname), "http", NULL, host, port, path);
 
-    if (ffurl_alloc(&mms->mms_hd, httpname, AVIO_RDONLY) < 0) {
+    if (ffurl_alloc(&mms->mms_hd, httpname, AVIO_FLAG_READ) < 0) {
         return AVERROR(EIO);
     }
 
@@ -261,7 +261,7 @@ static int mmsh_open(URLContext *h, const char *uri, int flags)
     // close the socket and then reopen it for sending the second play request.
     ffurl_close(mms->mms_hd);
     memset(headers, 0, sizeof(headers));
-    if (ffurl_alloc(&mms->mms_hd, httpname, AVIO_RDONLY) < 0) {
+    if (ffurl_alloc(&mms->mms_hd, httpname, AVIO_FLAG_READ) < 0) {
         return AVERROR(EIO);
     }
     stream_selection = av_mallocz(mms->stream_num * 19 + 1);
diff --git a/libavformat/mmst.c b/libavformat/mmst.c
index 775ab7ea7f..7b0af6c320 100644
--- a/libavformat/mmst.c
+++ b/libavformat/mmst.c
@@ -523,7 +523,7 @@ static int mms_open(URLContext *h, const char *uri, int flags)
 
     // establish tcp connection.
     ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, mmst->host, port, NULL);
-    err = ffurl_open(&mms->mms_hd, tcpname, AVIO_RDWR);
+    err = ffurl_open(&mms->mms_hd, tcpname, AVIO_FLAG_READ_WRITE);
     if (err)
         goto fail;
 
diff --git a/libavformat/mov.c b/libavformat/mov.c
index ad5d6a8d6e..ee033ea1e2 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1721,7 +1721,7 @@ static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref)
 
             av_strlcat(filename, ref->path + l + 1, 1024);
 
-            if (!avio_open(pb, filename, AVIO_RDONLY))
+            if (!avio_open(pb, filename, AVIO_FLAG_READ))
                 return 0;
         }
     }
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index 8996b725fd..6a1e1edebe 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -676,11 +676,6 @@ static int mpegts_push_data(MpegTSFilter *filter,
                         code == 0x1be) /* padding_stream */
                         goto skip;
 
-#if FF_API_MAX_STREAMS
-                    if (!pes->st && pes->stream->nb_streams == MAX_STREAMS)
-                        goto skip;
-#endif
-
                     /* stream not present in PMT */
                     if (!pes->st) {
                         pes->st = av_new_stream(ts->stream, pes->pid);
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 2957a2b173..dd1b8c7e17 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -30,11 +30,7 @@
 #undef NDEBUG
 #include <assert.h>
 
-#if FF_API_MAX_STREAMS
-#define NUT_MAX_STREAMS MAX_STREAMS
-#else
 #define NUT_MAX_STREAMS 256    /* arbitrary sanity check value */
-#endif
 
 static int get_str(AVIOContext *bc, char *string, unsigned int maxlen){
     unsigned int len= ffio_read_varlen(bc);
diff --git a/libavformat/options.c b/libavformat/options.c
index 27eb8da76a..214c62f9a7 100644
--- a/libavformat/options.c
+++ b/libavformat/options.c
@@ -50,10 +50,6 @@ static const AVOption options[]={
 {"noparse", "disable AVParsers, this needs nofillin too", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_NOPARSE, INT_MIN, INT_MAX, D, "fflags"},
 {"igndts", "ignore dts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNDTS, INT_MIN, INT_MAX, D, "fflags"},
 {"rtphint", "add rtp hinting", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_RTP_HINT, INT_MIN, INT_MAX, E, "fflags"},
-#if FF_API_OLD_METADATA
-{"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
-{"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E},
-#endif
 {"analyzeduration", "how many microseconds are analyzed to estimate duration", OFFSET(max_analyze_duration), FF_OPT_TYPE_INT, 5*AV_TIME_BASE, 0, INT_MAX, D},
 {"cryptokey", "decryption key", OFFSET(key), FF_OPT_TYPE_BINARY, 0, 0, 0, D},
 {"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), FF_OPT_TYPE_INT, 1<<20, 0, INT_MAX, D},
@@ -88,10 +84,3 @@ AVFormatContext *avformat_alloc_context(void)
     ic->av_class = &av_format_context_class;
     return ic;
 }
-
-#if FF_API_ALLOC_FORMAT_CONTEXT
-AVFormatContext *av_alloc_format_context(void)
-{
-    return avformat_alloc_context();
-}
-#endif
diff --git a/libavformat/output-example.c b/libavformat/output-example.c
index 27db78c658..ddd16f1eed 100644
--- a/libavformat/output-example.c
+++ b/libavformat/output-example.c
@@ -492,7 +492,7 @@ int main(int argc, char **argv)
 
     /* open the output file, if needed */
     if (!(fmt->flags & AVFMT_NOFILE)) {
-        if (avio_open(&oc->pb, filename, AVIO_WRONLY) < 0) {
+        if (avio_open(&oc->pb, filename, AVIO_FLAG_WRITE) < 0) {
             fprintf(stderr, "Could not open '%s'\n", filename);
             exit(1);
         }
diff --git a/libavformat/rtmpproto.c b/libavformat/rtmpproto.c
index 94361ca80d..b10cfb6ca7 100644
--- a/libavformat/rtmpproto.c
+++ b/libavformat/rtmpproto.c
@@ -38,13 +38,6 @@
 #include "rtmppkt.h"
 #include "url.h"
 
-/* we can't use av_log() with URLContext yet... */
-#if FF_API_URL_CLASS
-#define LOG_CONTEXT s
-#else
-#define LOG_CONTEXT NULL
-#endif
-
 //#define DEBUG
 
 /** RTMP protocol handler state */
@@ -166,7 +159,7 @@ static void gen_release_stream(URLContext *s, RTMPContext *rt)
     ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0,
                           29 + strlen(rt->playpath));
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Releasing stream...\n");
+    av_log(s, AV_LOG_DEBUG, "Releasing stream...\n");
     p = pkt.data;
     ff_amf_write_string(&p, "releaseStream");
     ff_amf_write_number(&p, 2.0);
@@ -189,7 +182,7 @@ static void gen_fcpublish_stream(URLContext *s, RTMPContext *rt)
     ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0,
                           25 + strlen(rt->playpath));
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "FCPublish stream...\n");
+    av_log(s, AV_LOG_DEBUG, "FCPublish stream...\n");
     p = pkt.data;
     ff_amf_write_string(&p, "FCPublish");
     ff_amf_write_number(&p, 3.0);
@@ -212,7 +205,7 @@ static void gen_fcunpublish_stream(URLContext *s, RTMPContext *rt)
     ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0,
                           27 + strlen(rt->playpath));
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "UnPublishing stream...\n");
+    av_log(s, AV_LOG_DEBUG, "UnPublishing stream...\n");
     p = pkt.data;
     ff_amf_write_string(&p, "FCUnpublish");
     ff_amf_write_number(&p, 5.0);
@@ -232,7 +225,7 @@ static void gen_create_stream(URLContext *s, RTMPContext *rt)
     RTMPPacket pkt;
     uint8_t *p;
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Creating stream...\n");
+    av_log(s, AV_LOG_DEBUG, "Creating stream...\n");
     ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, 25);
 
     p = pkt.data;
@@ -254,7 +247,7 @@ static void gen_delete_stream(URLContext *s, RTMPContext *rt)
     RTMPPacket pkt;
     uint8_t *p;
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Deleting stream...\n");
+    av_log(s, AV_LOG_DEBUG, "Deleting stream...\n");
     ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, 34);
 
     p = pkt.data;
@@ -276,7 +269,7 @@ static void gen_play(URLContext *s, RTMPContext *rt)
     RTMPPacket pkt;
     uint8_t *p;
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Sending play command for '%s'\n", rt->playpath);
+    av_log(s, AV_LOG_DEBUG, "Sending play command for '%s'\n", rt->playpath);
     ff_rtmp_packet_create(&pkt, RTMP_VIDEO_CHANNEL, RTMP_PT_INVOKE, 0,
                           20 + strlen(rt->playpath));
     pkt.extra = rt->main_channel_id;
@@ -310,7 +303,7 @@ static void gen_publish(URLContext *s, RTMPContext *rt)
     RTMPPacket pkt;
     uint8_t *p;
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Sending publish command for '%s'\n", rt->playpath);
+    av_log(s, AV_LOG_DEBUG, "Sending publish command for '%s'\n", rt->playpath);
     ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE, 0,
                           30 + strlen(rt->playpath));
     pkt.extra = rt->main_channel_id;
@@ -478,7 +471,7 @@ static int rtmp_handshake(URLContext *s, RTMPContext *rt)
     int server_pos, client_pos;
     uint8_t digest[32];
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Handshaking...\n");
+    av_log(s, AV_LOG_DEBUG, "Handshaking...\n");
 
     av_lfg_init(&rnd, 0xDEADC0DE);
     // generate handshake packet - 1536 bytes of pseudorandom data
@@ -489,16 +482,16 @@ static int rtmp_handshake(URLContext *s, RTMPContext *rt)
     ffurl_write(rt->stream, tosend, RTMP_HANDSHAKE_PACKET_SIZE + 1);
     i = ffurl_read_complete(rt->stream, serverdata, RTMP_HANDSHAKE_PACKET_SIZE + 1);
     if (i != RTMP_HANDSHAKE_PACKET_SIZE + 1) {
-        av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot read RTMP handshake response\n");
+        av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n");
         return -1;
     }
     i = ffurl_read_complete(rt->stream, clientdata, RTMP_HANDSHAKE_PACKET_SIZE);
     if (i != RTMP_HANDSHAKE_PACKET_SIZE) {
-        av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot read RTMP handshake response\n");
+        av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n");
         return -1;
     }
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Server version %d.%d.%d.%d\n",
+    av_log(s, AV_LOG_DEBUG, "Server version %d.%d.%d.%d\n",
            serverdata[5], serverdata[6], serverdata[7], serverdata[8]);
 
     if (rt->is_input && serverdata[5] >= 3) {
@@ -506,7 +499,7 @@ static int rtmp_handshake(URLContext *s, RTMPContext *rt)
         if (!server_pos) {
             server_pos = rtmp_validate_digest(serverdata + 1, 8);
             if (!server_pos) {
-                av_log(LOG_CONTEXT, AV_LOG_ERROR, "Server response validating failed\n");
+                av_log(s, AV_LOG_ERROR, "Server response validating failed\n");
                 return -1;
             }
         }
@@ -518,7 +511,7 @@ static int rtmp_handshake(URLContext *s, RTMPContext *rt)
                          digest, 32,
                          digest);
         if (memcmp(digest, clientdata + RTMP_HANDSHAKE_PACKET_SIZE - 32, 32)) {
-            av_log(LOG_CONTEXT, AV_LOG_ERROR, "Signature mismatch\n");
+            av_log(s, AV_LOG_ERROR, "Signature mismatch\n");
             return -1;
         }
 
@@ -552,13 +545,13 @@ static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
     const uint8_t *data_end = pkt->data + pkt->data_size;
 
 #ifdef DEBUG
-    ff_rtmp_packet_dump(LOG_CONTEXT, pkt);
+    ff_rtmp_packet_dump(s, pkt);
 #endif
 
     switch (pkt->type) {
     case RTMP_PT_CHUNK_SIZE:
         if (pkt->data_size != 4) {
-            av_log(LOG_CONTEXT, AV_LOG_ERROR,
+            av_log(s, AV_LOG_ERROR,
                    "Chunk size change packet is not 4 bytes long (%d)\n", pkt->data_size);
             return -1;
         }
@@ -566,10 +559,10 @@ static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
             ff_rtmp_packet_write(rt->stream, pkt, rt->chunk_size, rt->prev_pkt[1]);
         rt->chunk_size = AV_RB32(pkt->data);
         if (rt->chunk_size <= 0) {
-            av_log(LOG_CONTEXT, AV_LOG_ERROR, "Incorrect chunk size %d\n", rt->chunk_size);
+            av_log(s, AV_LOG_ERROR, "Incorrect chunk size %d\n", rt->chunk_size);
             return -1;
         }
-        av_log(LOG_CONTEXT, AV_LOG_DEBUG, "New chunk size = %d\n", rt->chunk_size);
+        av_log(s, AV_LOG_DEBUG, "New chunk size = %d\n", rt->chunk_size);
         break;
     case RTMP_PT_PING:
         t = AV_RB16(pkt->data);
@@ -578,12 +571,12 @@ static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
         break;
     case RTMP_PT_CLIENT_BW:
         if (pkt->data_size < 4) {
-            av_log(LOG_CONTEXT, AV_LOG_ERROR,
+            av_log(s, AV_LOG_ERROR,
                    "Client bandwidth report packet is less than 4 bytes long (%d)\n",
                    pkt->data_size);
             return -1;
         }
-        av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Client bandwidth = %d\n", AV_RB32(pkt->data));
+        av_log(s, AV_LOG_DEBUG, "Client bandwidth = %d\n", AV_RB32(pkt->data));
         rt->client_report_size = AV_RB32(pkt->data) >> 1;
         break;
     case RTMP_PT_INVOKE:
@@ -593,7 +586,7 @@ static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
 
             if (!ff_amf_get_field_value(pkt->data + 9, data_end,
                                         "description", tmpstr, sizeof(tmpstr)))
-                av_log(LOG_CONTEXT, AV_LOG_ERROR, "Server error: %s\n",tmpstr);
+                av_log(s, AV_LOG_ERROR, "Server error: %s\n",tmpstr);
             return -1;
         } else if (!memcmp(pkt->data, "\002\000\007_result", 10)) {
             switch (rt->state) {
@@ -624,7 +617,7 @@ static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
             case STATE_CONNECTING:
                 //extract a number from the result
                 if (pkt->data[10] || pkt->data[19] != 5 || pkt->data[20]) {
-                    av_log(LOG_CONTEXT, AV_LOG_WARNING, "Unexpected reply on connect()\n");
+                    av_log(s, AV_LOG_WARNING, "Unexpected reply on connect()\n");
                 } else {
                     rt->main_channel_id = (int) av_int2dbl(AV_RB64(pkt->data + 21));
                 }
@@ -651,7 +644,7 @@ static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
             if (!t && !strcmp(tmpstr, "error")) {
                 if (!ff_amf_get_field_value(ptr, data_end,
                                             "description", tmpstr, sizeof(tmpstr)))
-                    av_log(LOG_CONTEXT, AV_LOG_ERROR, "Server error: %s\n",tmpstr);
+                    av_log(s, AV_LOG_ERROR, "Server error: %s\n",tmpstr);
                 return -1;
             }
             t = ff_amf_get_field_value(ptr, data_end,
@@ -701,7 +694,7 @@ static int get_packet(URLContext *s, int for_header)
         }
         rt->bytes_read += ret;
         if (rt->bytes_read > rt->last_bytes_read + rt->client_report_size) {
-            av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Sending bytes read report\n");
+            av_log(s, AV_LOG_DEBUG, "Sending bytes read report\n");
             gen_bytes_read(s, rt, rpkt.timestamp + 1);
             rt->last_bytes_read = rt->bytes_read;
         }
@@ -812,7 +805,7 @@ static int rtmp_open(URLContext *s, const char *uri, int flags)
     if (!rt)
         return AVERROR(ENOMEM);
     s->priv_data = rt;
-    rt->is_input = !(flags & AVIO_WRONLY);
+    rt->is_input = !(flags & AVIO_FLAG_WRITE);
 
     av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port,
                  path, sizeof(path), s->filename);
@@ -821,8 +814,8 @@ static int rtmp_open(URLContext *s, const char *uri, int flags)
         port = RTMP_DEFAULT_PORT;
     ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
 
-    if (ffurl_open(&rt->stream, buf, AVIO_RDWR) < 0) {
-        av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot open connection %s\n", buf);
+    if (ffurl_open(&rt->stream, buf, AVIO_FLAG_READ_WRITE) < 0) {
+        av_log(s , AV_LOG_ERROR, "Cannot open connection %s\n", buf);
         goto fail;
     }
 
@@ -866,7 +859,7 @@ static int rtmp_open(URLContext *s, const char *uri, int flags)
     rt->bytes_read = 0;
     rt->last_bytes_read = 0;
 
-    av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Proto = %s, path = %s, app = %s, fname = %s\n",
+    av_log(s, AV_LOG_DEBUG, "Proto = %s, path = %s, app = %s, fname = %s\n",
            proto, path, rt->app, rt->playpath);
     gen_connect(s, rt, proto, hostname, port);
 
@@ -933,7 +926,7 @@ static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
     const uint8_t *buf_temp = buf;
 
     if (size < 11) {
-        av_log(LOG_CONTEXT, AV_LOG_DEBUG, "FLV packet too small %d\n", size);
+        av_log(s, AV_LOG_DEBUG, "FLV packet too small %d\n", size);
         return 0;
     }
 
diff --git a/libavformat/rtpproto.c b/libavformat/rtpproto.c
index d620cf9264..e822ed71d5 100644
--- a/libavformat/rtpproto.c
+++ b/libavformat/rtpproto.c
@@ -145,7 +145,7 @@ static int rtp_open(URLContext *h, const char *uri, int flags)
     char path[1024];
     const char *p;
 
-    is_output = (flags & AVIO_WRONLY);
+    is_output = (flags & AVIO_FLAG_WRITE);
 
     s = av_mallocz(sizeof(RTPContext));
     if (!s)
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 8afca34240..7ea5594952 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -1116,14 +1116,14 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
                                 "?localport=%d", j);
                     /* we will use two ports per rtp stream (rtp and rtcp) */
                     j += 2;
-                    if (ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_RDWR) == 0)
+                    if (ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE) == 0)
                         goto rtp_opened;
                 }
             }
 
 #if 0
             /* then try on any port */
-            if (ffurl_open(&rtsp_st->rtp_handle, "rtp://", AVIO_RDONLY) < 0) {
+            if (ffurl_open(&rtsp_st->rtp_handle, "rtp://", AVIO_FLAG_READ) < 0) {
                 err = AVERROR_INVALIDDATA;
                 goto fail;
             }
@@ -1269,7 +1269,7 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
                         namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
             ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
                         port, "?ttl=%d", ttl);
-            if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_RDWR) < 0) {
+            if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE) < 0) {
                 err = AVERROR_INVALIDDATA;
                 goto fail;
             }
@@ -1396,7 +1396,7 @@ redirect:
                  av_get_random_seed(), av_get_random_seed());
 
         /* GET requests */
-        if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_RDONLY) < 0) {
+        if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ) < 0) {
             err = AVERROR(EIO);
             goto fail;
         }
@@ -1417,7 +1417,7 @@ redirect:
         }
 
         /* POST requests */
-        if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_WRONLY) < 0 ) {
+        if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE) < 0 ) {
             err = AVERROR(EIO);
             goto fail;
         }
@@ -1460,7 +1460,7 @@ redirect:
     } else {
         /* open the tcp connection */
         ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
-        if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_RDWR) < 0) {
+        if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE) < 0) {
             err = AVERROR(EIO);
             goto fail;
         }
@@ -1807,7 +1807,7 @@ static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
                     namebuf, rtsp_st->sdp_port,
                     "?localport=%d&ttl=%d", rtsp_st->sdp_port,
                     rtsp_st->sdp_ttl);
-        if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_RDWR) < 0) {
+        if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE) < 0) {
             err = AVERROR_INVALIDDATA;
             goto fail;
         }
@@ -1863,7 +1863,7 @@ static int rtp_read_header(AVFormatContext *s,
     if (!ff_network_init())
         return AVERROR(EIO);
 
-    ret = ffurl_open(&in, s->filename, AVIO_RDONLY);
+    ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ);
     if (ret)
         goto fail;
 
diff --git a/libavformat/sapdec.c b/libavformat/sapdec.c
index 2c4bc8689e..ea4b982041 100644
--- a/libavformat/sapdec.c
+++ b/libavformat/sapdec.c
@@ -85,7 +85,7 @@ static int sap_read_header(AVFormatContext *s,
 
     ff_url_join(url, sizeof(url), "udp", NULL, host, port, "?localport=%d",
                 port);
-    ret = ffurl_open(&sap->ann_fd, url, AVIO_RDONLY);
+    ret = ffurl_open(&sap->ann_fd, url, AVIO_FLAG_READ);
     if (ret)
         goto fail;
 
diff --git a/libavformat/sapenc.c b/libavformat/sapenc.c
index 4ca14ad964..6cd3096d90 100644
--- a/libavformat/sapenc.c
+++ b/libavformat/sapenc.c
@@ -146,7 +146,7 @@ static int sap_write_header(AVFormatContext *s)
                     "?ttl=%d", ttl);
         if (!same_port)
             base_port += 2;
-        ret = ffurl_open(&fd, url, AVIO_WRONLY);
+        ret = ffurl_open(&fd, url, AVIO_FLAG_WRITE);
         if (ret) {
             ret = AVERROR(EIO);
             goto fail;
@@ -158,7 +158,7 @@ static int sap_write_header(AVFormatContext *s)
 
     ff_url_join(url, sizeof(url), "udp", NULL, announce_addr, port,
                 "?ttl=%d&connect=1", ttl);
-    ret = ffurl_open(&sap->ann_fd, url, AVIO_WRONLY);
+    ret = ffurl_open(&sap->ann_fd, url, AVIO_FLAG_WRITE);
     if (ret) {
         ret = AVERROR(EIO);
         goto fail;
diff --git a/libavformat/udp.c b/libavformat/udp.c
index 6f22277e23..2fefa5c5aa 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -292,10 +292,7 @@ int ff_udp_get_local_port(URLContext *h)
  * streams at the same time.
  * @param h media file context
  */
-#if !FF_API_UDP_GET_FILE
-static
-#endif
-int udp_get_file_handle(URLContext *h)
+static int udp_get_file_handle(URLContext *h)
 {
     UDPContext *s = h->priv_data;
     return s->udp_fd;
@@ -318,7 +315,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
     h->is_streamed = 1;
     h->max_packet_size = 1472;
 
-    is_output = (flags & AVIO_WRONLY);
+    is_output = (flags & AVIO_FLAG_WRITE);
 
     s = av_mallocz(sizeof(UDPContext));
     if (!s)
@@ -361,14 +358,14 @@ static int udp_open(URLContext *h, const char *uri, int flags)
     /* XXX: fix av_url_split */
     if (hostname[0] == '\0' || hostname[0] == '?') {
         /* only accepts null hostname if input */
-        if (flags & AVIO_WRONLY)
+        if (flags & AVIO_FLAG_WRITE)
             goto fail;
     } else {
         if (ff_udp_set_remote_url(h, uri) < 0)
             goto fail;
     }
 
-    if (s->is_multicast && !(h->flags & AVIO_WRONLY))
+    if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE))
         s->local_port = port;
     udp_fd = udp_socket_create(s, &my_addr, &len);
     if (udp_fd < 0)
@@ -385,7 +382,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
 
     /* the bind is needed to give a port to the socket now */
     /* if multicast, try the multicast address bind first */
-    if (s->is_multicast && !(h->flags & AVIO_WRONLY)) {
+    if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
         bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
     }
     /* bind to the local address if not multicast or if the multicast
@@ -398,7 +395,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
     s->local_port = udp_port(&my_addr, len);
 
     if (s->is_multicast) {
-        if (h->flags & AVIO_WRONLY) {
+        if (h->flags & AVIO_FLAG_WRITE) {
             /* output */
             if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
                 goto fail;
@@ -481,7 +478,7 @@ static int udp_close(URLContext *h)
 {
     UDPContext *s = h->priv_data;
 
-    if (s->is_multicast && !(h->flags & AVIO_WRONLY))
+    if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE))
         udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
     closesocket(s->udp_fd);
     av_free(s);
diff --git a/libavformat/utils.c b/libavformat/utils.c
index ffb114d5e9..971d4d7fcc 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -116,15 +116,9 @@ static void av_frac_add(AVFrac *f, int64_t incr)
 }
 
 /** head of registered input format linked list */
-#if !FF_API_FIRST_FORMAT
-static
-#endif
-AVInputFormat *first_iformat = NULL;
+static AVInputFormat *first_iformat = NULL;
 /** head of registered output format linked list */
-#if !FF_API_FIRST_FORMAT
-static
-#endif
-AVOutputFormat *first_oformat = NULL;
+static AVOutputFormat *first_oformat = NULL;
 
 AVInputFormat  *av_iformat_next(AVInputFormat  *f)
 {
@@ -201,14 +195,6 @@ static int match_format(const char *name, const char *names)
     return !strcasecmp(name, names);
 }
 
-#if FF_API_GUESS_FORMAT
-AVOutputFormat *guess_format(const char *short_name, const char *filename,
-                             const char *mime_type)
-{
-    return av_guess_format(short_name, filename, mime_type);
-}
-#endif
-
 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
                                 const char *mime_type)
 {
@@ -244,27 +230,6 @@ AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
     return fmt_found;
 }
 
-#if FF_API_GUESS_FORMAT
-AVOutputFormat *guess_stream_format(const char *short_name, const char *filename,
-                             const char *mime_type)
-{
-    AVOutputFormat *fmt = av_guess_format(short_name, filename, mime_type);
-
-    if (fmt) {
-        AVOutputFormat *stream_fmt;
-        char stream_format_name[64];
-
-        snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name);
-        stream_fmt = av_guess_format(stream_format_name, NULL, NULL);
-
-        if (stream_fmt)
-            fmt = stream_fmt;
-    }
-
-    return fmt;
-}
-#endif
-
 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
                             const char *filename, const char *mime_type, enum AVMediaType type){
     if(type == AVMEDIA_TYPE_VIDEO){
@@ -296,38 +261,6 @@ AVInputFormat *av_find_input_format(const char *short_name)
     return NULL;
 }
 
-#if FF_API_SYMVER && CONFIG_SHARED && HAVE_SYMVER
-FF_SYMVER(void, av_destruct_packet_nofree, (AVPacket *pkt), "LIBAVFORMAT_52")
-{
-    av_destruct_packet_nofree(pkt);
-}
-
-FF_SYMVER(void, av_destruct_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
-{
-    av_destruct_packet(pkt);
-}
-
-FF_SYMVER(int, av_new_packet, (AVPacket *pkt, int size), "LIBAVFORMAT_52")
-{
-    return av_new_packet(pkt, size);
-}
-
-FF_SYMVER(int, av_dup_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
-{
-    return av_dup_packet(pkt);
-}
-
-FF_SYMVER(void, av_free_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
-{
-    av_free_packet(pkt);
-}
-
-FF_SYMVER(void, av_init_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
-{
-    av_log(NULL, AV_LOG_WARNING, "Diverting av_*_packet function calls to libavcodec. Recompile to improve performance\n");
-    av_init_packet(pkt);
-}
-#endif
 
 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
 {
@@ -513,10 +446,6 @@ int av_open_input_stream(AVFormatContext **ic_ptr,
     if (pb && !ic->data_offset)
         ic->data_offset = avio_tell(ic->pb);
 
-#if FF_API_OLD_METADATA
-    ff_metadata_demux_compat(ic);
-#endif
-
     ic->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
 
     *ic_ptr = ic;
@@ -637,7 +566,7 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
        hack needed to handle RTSP/TCP */
     if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
         /* if no file needed do not try to open one */
-        if ((err=avio_open(&pb, filename, AVIO_RDONLY)) < 0) {
+        if ((err=avio_open(&pb, filename, AVIO_FLAG_READ)) < 0) {
             goto fail;
         }
         if (buf_size > 0) {
@@ -2639,18 +2568,11 @@ void avformat_free_context(AVFormatContext *s)
         av_free(st->codec->extradata);
         av_free(st->codec->subtitle_header);
         av_free(st->codec);
-#if FF_API_OLD_METADATA
-        av_free(st->filename);
-#endif
         av_free(st->priv_data);
         av_free(st->info);
         av_free(st);
     }
     for(i=s->nb_programs-1; i>=0; i--) {
-#if FF_API_OLD_METADATA
-        av_freep(&s->programs[i]->provider_name);
-        av_freep(&s->programs[i]->name);
-#endif
         av_metadata_free(&s->programs[i]->metadata);
         av_freep(&s->programs[i]->stream_index);
         av_freep(&s->programs[i]);
@@ -2658,9 +2580,6 @@ void avformat_free_context(AVFormatContext *s)
     av_freep(&s->programs);
     av_freep(&s->priv_data);
     while(s->nb_chapters--) {
-#if FF_API_OLD_METADATA
-        av_free(s->chapters[s->nb_chapters]->title);
-#endif
         av_metadata_free(&s->chapters[s->nb_chapters]->metadata);
         av_free(s->chapters[s->nb_chapters]);
     }
@@ -2682,13 +2601,6 @@ AVStream *av_new_stream(AVFormatContext *s, int id)
 {
     AVStream *st;
     int i;
-
-#if FF_API_MAX_STREAMS
-    if (s->nb_streams >= MAX_STREAMS){
-        av_log(s, AV_LOG_ERROR, "Too many streams\n");
-        return NULL;
-    }
-#else
     AVStream **streams;
 
     if (s->nb_streams >= INT_MAX/sizeof(*streams))
@@ -2697,7 +2609,6 @@ AVStream *av_new_stream(AVFormatContext *s, int id)
     if (!streams)
         return NULL;
     s->streams = streams;
-#endif
 
     st = av_mallocz(sizeof(AVStream));
     if (!st)
@@ -2777,9 +2688,6 @@ AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int6
             return NULL;
         dynarray_add(&s->chapters, &s->nb_chapters, chapter);
     }
-#if FF_API_OLD_METADATA
-    av_free(chapter->title);
-#endif
     av_metadata_set2(&chapter->metadata, "title", title, 0);
     chapter->id    = id;
     chapter->time_base= time_base;
@@ -2917,10 +2825,6 @@ int av_write_header(AVFormatContext *s)
             return AVERROR(ENOMEM);
     }
 
-#if FF_API_OLD_METADATA
-    ff_metadata_mux_compat(s);
-#endif
-
     /* set muxer identification string */
     if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
         av_metadata_set2(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
@@ -3408,24 +3312,6 @@ void av_dump_format(AVFormatContext *ic,
     av_free(printed);
 }
 
-#if FF_API_PARSE_FRAME_PARAM
-#include "libavutil/parseutils.h"
-
-int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
-{
-    return av_parse_video_size(width_ptr, height_ptr, str);
-}
-
-int parse_frame_rate(int *frame_rate_num, int *frame_rate_den, const char *arg)
-{
-    AVRational frame_rate;
-    int ret = av_parse_video_rate(&frame_rate, arg);
-    *frame_rate_num= frame_rate.num;
-    *frame_rate_den= frame_rate.den;
-    return ret;
-}
-#endif
-
 int64_t av_gettime(void)
 {
     struct timeval tv;
@@ -3605,24 +3491,6 @@ void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
     pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
 }
 
-#if FF_API_URL_SPLIT
-attribute_deprecated
-void ff_url_split(char *proto, int proto_size,
-                  char *authorization, int authorization_size,
-                  char *hostname, int hostname_size,
-                  int *port_ptr,
-                  char *path, int path_size,
-                  const char *url)
-{
-    av_url_split(proto, proto_size,
-                 authorization, authorization_size,
-                 hostname, hostname_size,
-                 port_ptr,
-                 path, path_size,
-                 url);
-}
-#endif
-
 void av_url_split(char *proto, int proto_size,
                   char *authorization, int authorization_size,
                   char *hostname, int hostname_size,
diff --git a/libavformat/version.h b/libavformat/version.h
index eec52b2363..0ec2400e27 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -23,8 +23,8 @@
 
 #include "libavutil/avutil.h"
 
-#define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 108
+#define LIBAVFORMAT_VERSION_MAJOR 53
+#define LIBAVFORMAT_VERSION_MINOR  0
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
@@ -41,60 +41,15 @@
  * Those FF_API_* defines are not part of public API.
  * They may change, break or disappear at any time.
  */
-#ifndef FF_API_MAX_STREAMS
-#define FF_API_MAX_STREAMS             (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_OLD_METADATA
-#define FF_API_OLD_METADATA            (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
 #ifndef FF_API_OLD_METADATA2
 #define FF_API_OLD_METADATA2           (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif
-#ifndef FF_API_URL_CLASS
-#define FF_API_URL_CLASS               (LIBAVFORMAT_VERSION_MAJOR >= 53)
-#endif
-#ifndef FF_API_URL_RESETBUF
-#define FF_API_URL_RESETBUF            (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_REGISTER_PROTOCOL
-#define FF_API_REGISTER_PROTOCOL       (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_GUESS_FORMAT
-#define FF_API_GUESS_FORMAT            (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_UDP_GET_FILE
-#define FF_API_UDP_GET_FILE            (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_URL_SPLIT
-#define FF_API_URL_SPLIT               (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_ALLOC_FORMAT_CONTEXT
-#define FF_API_ALLOC_FORMAT_CONTEXT    (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_PARSE_FRAME_PARAM
-#define FF_API_PARSE_FRAME_PARAM       (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
 #ifndef FF_API_READ_SEEK
 #define FF_API_READ_SEEK               (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif
-#ifndef FF_API_LAVF_UNUSED
-#define FF_API_LAVF_UNUSED             (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_PARAMETERS_CODEC_ID
-#define FF_API_PARAMETERS_CODEC_ID     (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_FIRST_FORMAT
-#define FF_API_FIRST_FORMAT            (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
-#ifndef FF_API_SYMVER
-#define FF_API_SYMVER                  (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
 #ifndef FF_API_OLD_AVIO
 #define FF_API_OLD_AVIO                (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif
-#ifndef FF_API_INDEX_BUILT
-#define FF_API_INDEX_BUILT             (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
 #ifndef FF_API_DUMP_FORMAT
 #define FF_API_DUMP_FORMAT             (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif
diff --git a/libavutil/avutil.h b/libavutil/avutil.h
index e44a2b7c6f..307a585290 100644
--- a/libavutil/avutil.h
+++ b/libavutil/avutil.h
@@ -39,9 +39,9 @@
 #define AV_VERSION_DOT(a, b, c) a ##.## b ##.## c
 #define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
 
-#define LIBAVUTIL_VERSION_MAJOR 50
-#define LIBAVUTIL_VERSION_MINOR 40
-#define LIBAVUTIL_VERSION_MICRO  1
+#define LIBAVUTIL_VERSION_MAJOR 51
+#define LIBAVUTIL_VERSION_MINOR  0
+#define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \
@@ -58,7 +58,7 @@
  * They may change, break or disappear at any time.
  */
 #ifndef FF_API_OLD_EVAL_NAMES
-#define FF_API_OLD_EVAL_NAMES (LIBAVUTIL_VERSION_MAJOR < 51)
+#define FF_API_OLD_EVAL_NAMES (LIBAVUTIL_VERSION_MAJOR < 52)
 #endif
 
 /**
@@ -97,14 +97,6 @@ enum AVMediaType {
 #define AV_TIME_BASE            1000000
 #define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
 
-/**
- * Those FF_API_* defines are not part of public API.
- * They may change, break or disappear at any time.
- */
-#ifndef FF_API_OLD_IMAGE_NAMES
-#define FF_API_OLD_IMAGE_NAMES (LIBAVUTIL_VERSION_MAJOR < 51)
-#endif
-
 #include "common.h"
 #include "error.h"
 #include "mathematics.h"
diff --git a/libavutil/error.h b/libavutil/error.h
index 0d475664c7..d371e6b0fe 100644
--- a/libavutil/error.h
+++ b/libavutil/error.h
@@ -37,25 +37,19 @@
 #define AVUNERROR(e) (e)
 #endif
 
-#if LIBAVUTIL_VERSION_MAJOR < 51
-#define AVERROR_INVALIDDATA AVERROR(EINVAL)  ///< Invalid data found when processing input
 #define AVERROR_IO          AVERROR(EIO)     ///< I/O error
 #define AVERROR_NOENT       AVERROR(ENOENT)  ///< No such file or directory
 #define AVERROR_NOFMT       AVERROR(EILSEQ)  ///< Unknown format
 #define AVERROR_NOMEM       AVERROR(ENOMEM)  ///< Not enough memory
 #define AVERROR_NOTSUPP     AVERROR(ENOSYS)  ///< Operation not supported
-#define AVERROR_NUMEXPECTED AVERROR(EDOM)    ///< Number syntax expected in filename
 #define AVERROR_UNKNOWN     AVERROR(EINVAL)  ///< Unknown error
-#endif
 
 #define AVERROR_EOF         AVERROR(EPIPE)   ///< End of file
 
 #define AVERROR_PATCHWELCOME    (-MKTAG('P','A','W','E')) ///< Not yet implemented in FFmpeg, patches welcome
 
-#if LIBAVUTIL_VERSION_MAJOR > 50
 #define AVERROR_INVALIDDATA     (-MKTAG('I','N','D','A')) ///< Invalid data found when processing input
 #define AVERROR_NUMEXPECTED     (-MKTAG('N','U','E','X')) ///< Number syntax expected in filename
-#endif
 
 #define AVERROR_DEMUXER_NOT_FOUND  (-MKTAG(0xF8,'D','E','M')) ///< Demuxer not found
 #define AVERROR_MUXER_NOT_FOUND    (-MKTAG(0xF8,'M','U','X')) ///< Muxer not found
diff --git a/libavutil/file.c b/libavutil/file.c
index c79f68aab3..b2d380df9d 100644
--- a/libavutil/file.c
+++ b/libavutil/file.c
@@ -47,7 +47,6 @@ int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
     av_unused void *ptr;
     off_t off_size;
     char errbuf[128];
-    size_t max_size = HAVE_MMAP ? SIZE_MAX : FF_INTERNAL_MEM_TYPE_MAX_VALUE;
     *bufptr = NULL;
 
     if (fd < 0) {
@@ -66,7 +65,7 @@ int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
     }
 
     off_size = st.st_size;
-    if (off_size > max_size) {
+    if (off_size > SIZE_MAX) {
         av_log(&file_log_ctx, AV_LOG_ERROR,
                "File size for file '%s' is too big\n", filename);
         close(fd);
diff --git a/libavutil/imgutils.c b/libavutil/imgutils.c
index 0f449ff427..8eefa4d494 100644
--- a/libavutil/imgutils.c
+++ b/libavutil/imgutils.c
@@ -266,32 +266,3 @@ void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
         }
     }
 }
-
-#if FF_API_OLD_IMAGE_NAMES
-void av_fill_image_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
-                                const AVPixFmtDescriptor *pixdesc)
-{
-    av_image_fill_max_pixsteps(max_pixsteps, max_pixstep_comps, pixdesc);
-}
-
-int av_get_image_linesize(enum PixelFormat pix_fmt, int width, int plane)
-{
-    return av_image_get_linesize(pix_fmt, width, plane);
-}
-
-int av_fill_image_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width)
-{
-    return av_image_fill_linesizes(linesizes, pix_fmt, width);
-}
-
-int av_fill_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
-                           uint8_t *ptr, const int linesizes[4])
-{
-    return av_image_fill_pointers(data, pix_fmt, height, ptr, linesizes);
-}
-
-int av_check_image_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
-{
-    return av_image_check_size(w, h, log_offset, log_ctx);
-}
-#endif
diff --git a/libavutil/imgutils.h b/libavutil/imgutils.h
index c181863579..7a714d1f2d 100644
--- a/libavutil/imgutils.h
+++ b/libavutil/imgutils.h
@@ -127,23 +127,4 @@ int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *lo
 
 int ff_set_systematic_pal2(uint32_t pal[256], enum PixelFormat pix_fmt);
 
-#if FF_API_OLD_IMAGE_NAMES
-attribute_deprecated
-void av_fill_image_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
-                                const AVPixFmtDescriptor *pixdesc);
-
-attribute_deprecated
-int av_get_image_linesize(enum PixelFormat pix_fmt, int width, int plane);
-
-attribute_deprecated
-int av_fill_image_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width);
-
-attribute_deprecated
-int av_fill_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
-                           uint8_t *ptr, const int linesizes[4]);
-
-attribute_deprecated
-int av_check_image_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx);
-#endif
-
 #endif /* AVUTIL_IMGUTILS_H */
diff --git a/libavutil/log.c b/libavutil/log.c
index abf939d65e..d7daaa2706 100644
--- a/libavutil/log.c
+++ b/libavutil/log.c
@@ -29,10 +29,7 @@
 #include "avutil.h"
 #include "log.h"
 
-#if LIBAVUTIL_VERSION_MAJOR > 50
-static
-#endif
-int av_log_level = AV_LOG_INFO;
+static int av_log_level = AV_LOG_INFO;
 static int flags;
 
 #if defined(_WIN32) && !defined(__MINGW32CE__)
diff --git a/libavutil/mem.c b/libavutil/mem.c
index 7ffd6cba9b..7e07fd2596 100644
--- a/libavutil/mem.c
+++ b/libavutil/mem.c
@@ -61,7 +61,7 @@ void  free(void *ptr);
    memory allocator. You do not need to suppress this file because the
    linker will do it automatically. */
 
-void *av_malloc(FF_INTERNAL_MEM_TYPE size)
+void *av_malloc(size_t size)
 {
     void *ptr = NULL;
 #if CONFIG_MEMALIGN_HACK
@@ -116,7 +116,7 @@ void *av_malloc(FF_INTERNAL_MEM_TYPE size)
     return ptr;
 }
 
-void *av_realloc(void *ptr, FF_INTERNAL_MEM_TYPE size)
+void *av_realloc(void *ptr, size_t size)
 {
 #if CONFIG_MEMALIGN_HACK
     int diff;
@@ -153,7 +153,7 @@ void av_freep(void *arg)
     *ptr = NULL;
 }
 
-void *av_mallocz(FF_INTERNAL_MEM_TYPE size)
+void *av_mallocz(size_t size)
 {
     void *ptr = av_malloc(size);
     if (ptr)
diff --git a/libavutil/mem.h b/libavutil/mem.h
index 2bfbd0eac5..7aab706e7d 100644
--- a/libavutil/mem.h
+++ b/libavutil/mem.h
@@ -62,14 +62,6 @@
     #define av_alloc_size(n)
 #endif
 
-#if LIBAVUTIL_VERSION_MAJOR < 51
-#   define FF_INTERNAL_MEM_TYPE unsigned int
-#   define FF_INTERNAL_MEM_TYPE_MAX_VALUE UINT_MAX
-#else
-#   define FF_INTERNAL_MEM_TYPE size_t
-#   define FF_INTERNAL_MEM_TYPE_MAX_VALUE SIZE_MAX
-#endif
-
 /**
  * Allocate a block of size bytes with alignment suitable for all
  * memory accesses (including vectors if available on the CPU).
@@ -78,7 +70,7 @@
  * be allocated.
  * @see av_mallocz()
  */
-void *av_malloc(FF_INTERNAL_MEM_TYPE size) av_malloc_attrib av_alloc_size(1);
+void *av_malloc(size_t size) av_malloc_attrib av_alloc_size(1);
 
 /**
  * Allocate or reallocate a block of memory.
@@ -92,7 +84,7 @@ void *av_malloc(FF_INTERNAL_MEM_TYPE size) av_malloc_attrib av_alloc_size(1);
  * cannot be reallocated or the function is used to free the memory block.
  * @see av_fast_realloc()
  */
-void *av_realloc(void *ptr, FF_INTERNAL_MEM_TYPE size) av_alloc_size(2);
+void *av_realloc(void *ptr, size_t size) av_alloc_size(2);
 
 /**
  * Free a memory block which has been allocated with av_malloc(z)() or
@@ -112,7 +104,7 @@ void av_free(void *ptr);
  * @return Pointer to the allocated block, NULL if it cannot be allocated.
  * @see av_malloc()
  */
-void *av_mallocz(FF_INTERNAL_MEM_TYPE size) av_malloc_attrib av_alloc_size(1);
+void *av_mallocz(size_t size) av_malloc_attrib av_alloc_size(1);
 
 /**
  * Duplicate the string s.
diff --git a/libswscale/options.c b/libswscale/options.c
index 5817d3faae..9ec37e44ed 100644
--- a/libswscale/options.c
+++ b/libswscale/options.c
@@ -20,7 +20,7 @@
 
 #include "libavutil/avutil.h"
 #include "libavutil/pixfmt.h"
-#include "libavcodec/opt.h"
+#include "libavutil/opt.h"
 #include "swscale.h"
 #include "swscale_internal.h"