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ffmpeg/avprobe.c

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/*
* avprobe : Simple Media Prober based on the Libav libraries
* Copyright (c) 2007-2010 Stefano Sabatini
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "libavformat/avformat.h"
#include "libavcodec/avcodec.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/dict.h"
#include "libavutil/libm.h"
#include "libavdevice/avdevice.h"
#include "cmdutils.h"
const char program_name[] = "avprobe";
const int program_birth_year = 2007;
static int do_show_format = 0;
static AVDictionary *fmt_entries_to_show = NULL;
static int nb_fmt_entries_to_show;
static int do_show_packets = 0;
static int do_show_streams = 0;
static int show_value_unit = 0;
static int use_value_prefix = 0;
static int use_byte_value_binary_prefix = 0;
static int use_value_sexagesimal_format = 0;
/* globals */
static const OptionDef *options;
/* AVprobe context */
static const char *input_filename;
static AVInputFormat *iformat = NULL;
static const char *const binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
static const char *const decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P" };
static const char unit_second_str[] = "s" ;
static const char unit_hertz_str[] = "Hz" ;
static const char unit_byte_str[] = "byte" ;
static const char unit_bit_per_second_str[] = "bit/s";
static void exit_program(void)
{
av_dict_free(&fmt_entries_to_show);
}
/*
* The output is structured in array and objects that might contain items
* Array could require the objects within to not be named.
* Object could require the items within to be named.
*
* For flat representation the name of each section is saved on prefix so it
* can be rendered in order to represent nested structures (e.g. array of
* objects for the packets list).
*
* Within an array each element can need an unique identifier or an index.
*
* Nesting level is accounted separately.
*/
typedef enum {
ARRAY,
OBJECT
} ProbeElementType;
typedef struct {
const char *name;
ProbeElementType type;
int64_t index;
int64_t nb_elems;
} ProbeElement;
typedef struct {
ProbeElement *prefix;
int level;
void (*print_header)(void);
void (*print_footer)(void);
void (*print_array_header) (const char *name);
void (*print_array_footer) (const char *name);
void (*print_object_header)(const char *name);
void (*print_object_footer)(const char *name);
void (*print_integer) (const char *key, int64_t value);
void (*print_string) (const char *key, const char *value);
} OutputContext;
static AVIOContext *probe_out = NULL;
static OutputContext octx;
#define AVP_INDENT() avio_printf(probe_out, "%*c", octx.level * 2, ' ')
/*
* Default format, INI
*
* - all key and values are utf8
* - '.' is the subgroup separator
* - newlines and the following characters are escaped
* - '\' is the escape character
* - '#' is the comment
* - '=' is the key/value separators
* - ':' is not used but usually parsed as key/value separator
*/
static void ini_print_header(void)
{
avio_printf(probe_out, "# avprobe output\n\n");
}
static void ini_print_footer(void)
{
avio_w8(probe_out, '\n');
}
static void ini_escape_print(const char *s)
{
int i = 0;
char c = 0;
while (c = s[i++]) {
switch (c) {
case '\r': avio_printf(probe_out, "%s", "\\r"); break;
case '\n': avio_printf(probe_out, "%s", "\\n"); break;
case '\f': avio_printf(probe_out, "%s", "\\f"); break;
case '\b': avio_printf(probe_out, "%s", "\\b"); break;
case '\t': avio_printf(probe_out, "%s", "\\t"); break;
case '\\':
case '#' :
case '=' :
case ':' : avio_w8(probe_out, '\\');
default:
if ((unsigned char)c < 32)
avio_printf(probe_out, "\\x00%02x", c & 0xff);
else
avio_w8(probe_out, c);
break;
}
}
}
static void ini_print_array_header(const char *name)
{
if (octx.prefix[octx.level -1].nb_elems)
avio_printf(probe_out, "\n");
}
static void ini_print_object_header(const char *name)
{
int i;
ProbeElement *el = octx.prefix + octx.level -1;
if (el->nb_elems)
avio_printf(probe_out, "\n");
avio_printf(probe_out, "[");
for (i = 1; i < octx.level; i++) {
el = octx.prefix + i;
avio_printf(probe_out, "%s.", el->name);
if (el->index >= 0)
avio_printf(probe_out, "%"PRId64".", el->index);
}
avio_printf(probe_out, "%s", name);
if (el && el->type == ARRAY)
avio_printf(probe_out, ".%"PRId64"", el->nb_elems);
avio_printf(probe_out, "]\n");
}
static void ini_print_integer(const char *key, int64_t value)
{
ini_escape_print(key);
avio_printf(probe_out, "=%"PRId64"\n", value);
}
static void ini_print_string(const char *key, const char *value)
{
ini_escape_print(key);
avio_printf(probe_out, "=");
ini_escape_print(value);
avio_w8(probe_out, '\n');
}
/*
* Alternate format, JSON
*/
static void json_print_header(void)
{
avio_printf(probe_out, "{");
}
static void json_print_footer(void)
{
avio_printf(probe_out, "}\n");
}
static void json_print_array_header(const char *name)
{
if (octx.prefix[octx.level -1].nb_elems)
avio_printf(probe_out, ",\n");
AVP_INDENT();
avio_printf(probe_out, "\"%s\" : ", name);
avio_printf(probe_out, "[\n");
}
static void json_print_array_footer(const char *name)
{
avio_printf(probe_out, "\n");
AVP_INDENT();
avio_printf(probe_out, "]");
}
static void json_print_object_header(const char *name)
{
if (octx.prefix[octx.level -1].nb_elems)
avio_printf(probe_out, ",\n");
AVP_INDENT();
if (octx.prefix[octx.level -1].type == OBJECT)
avio_printf(probe_out, "\"%s\" : ", name);
avio_printf(probe_out, "{\n");
}
static void json_print_object_footer(const char *name)
{
avio_printf(probe_out, "\n");
AVP_INDENT();
avio_printf(probe_out, "}");
}
static void json_print_integer(const char *key, int64_t value)
{
if (octx.prefix[octx.level -1].nb_elems)
avio_printf(probe_out, ",\n");
AVP_INDENT();
avio_printf(probe_out, "\"%s\" : %"PRId64"", key, value);
}
static void json_escape_print(const char *s)
{
int i = 0;
char c = 0;
while (c = s[i++]) {
switch (c) {
case '\r': avio_printf(probe_out, "%s", "\\r"); break;
case '\n': avio_printf(probe_out, "%s", "\\n"); break;
case '\f': avio_printf(probe_out, "%s", "\\f"); break;
case '\b': avio_printf(probe_out, "%s", "\\b"); break;
case '\t': avio_printf(probe_out, "%s", "\\t"); break;
case '\\':
case '"' : avio_w8(probe_out, '\\');
default:
if ((unsigned char)c < 32)
avio_printf(probe_out, "\\u00%02x", c & 0xff);
else
avio_w8(probe_out, c);
break;
}
}
}
static void json_print_string(const char *key, const char *value)
{
if (octx.prefix[octx.level -1].nb_elems)
avio_printf(probe_out, ",\n");
AVP_INDENT();
avio_w8(probe_out, '\"');
json_escape_print(key);
avio_printf(probe_out, "\" : \"");
json_escape_print(value);
avio_w8(probe_out, '\"');
}
/*
* old-style pseudo-INI
*/
static void old_print_object_header(const char *name)
{
char *str, *p;
if (!strcmp(name, "tags"))
return;
str = p = av_strdup(name);
while (*p) {
*p = toupper(*p);
p++;
}
avio_printf(probe_out, "[%s]\n", str);
av_freep(&str);
}
static void old_print_object_footer(const char *name)
{
char *str, *p;
if (!strcmp(name, "tags"))
return;
str = p = av_strdup(name);
while (*p) {
*p = toupper(*p);
p++;
}
avio_printf(probe_out, "[/%s]\n", str);
av_freep(&str);
}
static void old_print_string(const char *key, const char *value)
{
if (!strcmp(octx.prefix[octx.level - 1].name, "tags"))
avio_printf(probe_out, "TAG:");
ini_print_string(key, value);
}
/*
* Simple Formatter for single entries.
*/
static void show_format_entry_integer(const char *key, int64_t value)
{
if (key && av_dict_get(fmt_entries_to_show, key, NULL, 0)) {
if (nb_fmt_entries_to_show > 1)
avio_printf(probe_out, "%s=", key);
avio_printf(probe_out, "%"PRId64"\n", value);
}
}
static void show_format_entry_string(const char *key, const char *value)
{
if (key && av_dict_get(fmt_entries_to_show, key, NULL, 0)) {
if (nb_fmt_entries_to_show > 1)
avio_printf(probe_out, "%s=", key);
avio_printf(probe_out, "%s\n", value);
}
}
static void probe_group_enter(const char *name, int type)
{
int64_t count = -1;
octx.prefix =
av_realloc(octx.prefix, sizeof(ProbeElement) * (octx.level + 1));
if (!octx.prefix || !name) {
fprintf(stderr, "Out of memory\n");
exit(1);
}
if (octx.level) {
ProbeElement *parent = octx.prefix + octx.level -1;
if (parent->type == ARRAY)
count = parent->nb_elems;
parent->nb_elems++;
}
octx.prefix[octx.level++] = (ProbeElement){name, type, count, 0};
}
static void probe_group_leave(void)
{
--octx.level;
}
static void probe_header(void)
{
if (octx.print_header)
octx.print_header();
probe_group_enter("root", OBJECT);
}
static void probe_footer(void)
{
if (octx.print_footer)
octx.print_footer();
probe_group_leave();
}
static void probe_array_header(const char *name)
{
if (octx.print_array_header)
octx.print_array_header(name);
probe_group_enter(name, ARRAY);
}
static void probe_array_footer(const char *name)
{
probe_group_leave();
if (octx.print_array_footer)
octx.print_array_footer(name);
}
static void probe_object_header(const char *name)
{
if (octx.print_object_header)
octx.print_object_header(name);
probe_group_enter(name, OBJECT);
}
static void probe_object_footer(const char *name)
{
probe_group_leave();
if (octx.print_object_footer)
octx.print_object_footer(name);
}
static void probe_int(const char *key, int64_t value)
{
octx.print_integer(key, value);
octx.prefix[octx.level -1].nb_elems++;
}
static void probe_str(const char *key, const char *value)
{
octx.print_string(key, value);
octx.prefix[octx.level -1].nb_elems++;
}
static void probe_dict(AVDictionary *dict, const char *name)
{
AVDictionaryEntry *entry = NULL;
if (!dict)
return;
probe_object_header(name);
while ((entry = av_dict_get(dict, "", entry, AV_DICT_IGNORE_SUFFIX))) {
probe_str(entry->key, entry->value);
}
probe_object_footer(name);
}
static char *value_string(char *buf, int buf_size, double val, const char *unit)
{
if (unit == unit_second_str && use_value_sexagesimal_format) {
double secs;
int hours, mins;
secs = val;
mins = (int)secs / 60;
secs = secs - mins * 60;
hours = mins / 60;
mins %= 60;
snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs);
} else if (use_value_prefix) {
const char *prefix_string;
int index;
if (unit == unit_byte_str && use_byte_value_binary_prefix) {
index = (int) log2(val) / 10;
index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) - 1);
val /= pow(2, index * 10);
prefix_string = binary_unit_prefixes[index];
} else {
index = (int) (log10(val)) / 3;
index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) - 1);
val /= pow(10, index * 3);
prefix_string = decimal_unit_prefixes[index];
}
snprintf(buf, buf_size, "%.*f%s%s",
index ? 3 : 0, val,
prefix_string,
show_value_unit ? unit : "");
} else {
snprintf(buf, buf_size, "%f%s", val, show_value_unit ? unit : "");
}
return buf;
}
static char *time_value_string(char *buf, int buf_size, int64_t val,
const AVRational *time_base)
{
if (val == AV_NOPTS_VALUE) {
snprintf(buf, buf_size, "N/A");
} else {
value_string(buf, buf_size, val * av_q2d(*time_base), unit_second_str);
}
return buf;
}
static char *ts_value_string(char *buf, int buf_size, int64_t ts)
{
if (ts == AV_NOPTS_VALUE) {
snprintf(buf, buf_size, "N/A");
} else {
snprintf(buf, buf_size, "%"PRId64, ts);
}
return buf;
}
static char *rational_string(char *buf, int buf_size, const char *sep,
const AVRational *rat)
{
snprintf(buf, buf_size, "%d%s%d", rat->num, sep, rat->den);
return buf;
}
static char *tag_string(char *buf, int buf_size, int tag)
{
snprintf(buf, buf_size, "0x%04x", tag);
return buf;
}
static const char *media_type_string(enum AVMediaType media_type)
{
switch (media_type) {
case AVMEDIA_TYPE_VIDEO: return "video";
case AVMEDIA_TYPE_AUDIO: return "audio";
case AVMEDIA_TYPE_DATA: return "data";
case AVMEDIA_TYPE_SUBTITLE: return "subtitle";
case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
default: return "unknown";
}
}
static void show_packet(AVFormatContext *fmt_ctx, AVPacket *pkt)
{
char val_str[128];
AVStream *st = fmt_ctx->streams[pkt->stream_index];
probe_object_header("packet");
probe_str("codec_type", media_type_string(st->codec->codec_type));
probe_int("stream_index", pkt->stream_index);
probe_str("pts", ts_value_string(val_str, sizeof(val_str), pkt->pts));
probe_str("pts_time", time_value_string(val_str, sizeof(val_str),
pkt->pts, &st->time_base));
probe_str("dts", ts_value_string(val_str, sizeof(val_str), pkt->dts));
probe_str("dts_time", time_value_string(val_str, sizeof(val_str),
pkt->dts, &st->time_base));
probe_str("duration", ts_value_string(val_str, sizeof(val_str),
pkt->duration));
probe_str("duration_time", time_value_string(val_str, sizeof(val_str),
pkt->duration,
&st->time_base));
probe_str("size", value_string(val_str, sizeof(val_str),
pkt->size, unit_byte_str));
probe_int("pos", pkt->pos);
probe_str("flags", pkt->flags & AV_PKT_FLAG_KEY ? "K" : "_");
probe_object_footer("packet");
}
static void show_packets(AVFormatContext *fmt_ctx)
{
AVPacket pkt;
av_init_packet(&pkt);
probe_array_header("packets");
while (!av_read_frame(fmt_ctx, &pkt))
show_packet(fmt_ctx, &pkt);
probe_array_footer("packets");
}
static void show_stream(AVFormatContext *fmt_ctx, int stream_idx)
{
AVStream *stream = fmt_ctx->streams[stream_idx];
AVCodecContext *dec_ctx;
const AVCodec *dec;
const char *profile;
char val_str[128];
AVRational display_aspect_ratio;
probe_object_header("stream");
probe_int("index", stream->index);
if ((dec_ctx = stream->codec)) {
if ((dec = dec_ctx->codec)) {
probe_str("codec_name", dec->name);
probe_str("codec_long_name", dec->long_name);
} else {
probe_str("codec_name", "unknown");
}
probe_str("codec_type", media_type_string(dec_ctx->codec_type));
probe_str("codec_time_base",
rational_string(val_str, sizeof(val_str),
"/", &dec_ctx->time_base));
/* print AVI/FourCC tag */
av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
probe_str("codec_tag_string", val_str);
probe_str("codec_tag", tag_string(val_str, sizeof(val_str),
dec_ctx->codec_tag));
/* print profile, if there is one */
if (dec && (profile = av_get_profile_name(dec, dec_ctx->profile)))
probe_str("profile", profile);
switch (dec_ctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
probe_int("width", dec_ctx->width);
probe_int("height", dec_ctx->height);
probe_int("has_b_frames", dec_ctx->has_b_frames);
if (dec_ctx->sample_aspect_ratio.num) {
probe_str("sample_aspect_ratio",
rational_string(val_str, sizeof(val_str), ":",
&dec_ctx->sample_aspect_ratio));
av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
dec_ctx->width * dec_ctx->sample_aspect_ratio.num,
dec_ctx->height * dec_ctx->sample_aspect_ratio.den,
1024*1024);
probe_str("display_aspect_ratio",
rational_string(val_str, sizeof(val_str), ":",
&display_aspect_ratio));
}
probe_str("pix_fmt",
dec_ctx->pix_fmt != AV_PIX_FMT_NONE ?
av_pix_fmt_descriptors[dec_ctx->pix_fmt].name : "unknown");
probe_int("level", dec_ctx->level);
break;
case AVMEDIA_TYPE_AUDIO:
probe_str("sample_rate",
value_string(val_str, sizeof(val_str),
dec_ctx->sample_rate,
unit_hertz_str));
probe_int("channels", dec_ctx->channels);
probe_int("bits_per_sample",
av_get_bits_per_sample(dec_ctx->codec_id));
break;
}
} else {
probe_str("codec_type", "unknown");
}
if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS)
probe_int("id", stream->id);
probe_str("avg_frame_rate",
rational_string(val_str, sizeof(val_str), "/",
&stream->avg_frame_rate));
probe_str("time_base",
rational_string(val_str, sizeof(val_str), "/",
&stream->time_base));
probe_str("start_time",
time_value_string(val_str, sizeof(val_str),
stream->start_time, &stream->time_base));
probe_str("duration",
time_value_string(val_str, sizeof(val_str),
stream->duration, &stream->time_base));
if (stream->nb_frames)
probe_int("nb_frames", stream->nb_frames);
probe_dict(stream->metadata, "tags");
probe_object_footer("stream");
}
static void show_format(AVFormatContext *fmt_ctx)
{
char val_str[128];
int64_t size = fmt_ctx->pb ? avio_size(fmt_ctx->pb) : -1;
probe_object_header("format");
probe_str("filename", fmt_ctx->filename);
probe_int("nb_streams", fmt_ctx->nb_streams);
probe_str("format_name", fmt_ctx->iformat->name);
probe_str("format_long_name", fmt_ctx->iformat->long_name);
probe_str("start_time",
time_value_string(val_str, sizeof(val_str),
fmt_ctx->start_time, &AV_TIME_BASE_Q));
probe_str("duration",
time_value_string(val_str, sizeof(val_str),
fmt_ctx->duration, &AV_TIME_BASE_Q));
probe_str("size",
size >= 0 ? value_string(val_str, sizeof(val_str),
size, unit_byte_str)
: "unknown");
probe_str("bit_rate",
value_string(val_str, sizeof(val_str),
fmt_ctx->bit_rate, unit_bit_per_second_str));
probe_dict(fmt_ctx->metadata, "tags");
probe_object_footer("format");
}
static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
{
int err, i;
AVFormatContext *fmt_ctx = NULL;
AVDictionaryEntry *t;
if ((err = avformat_open_input(&fmt_ctx, filename,
iformat, &format_opts)) < 0) {
print_error(filename, err);
return err;
}
if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
return AVERROR_OPTION_NOT_FOUND;
}
/* fill the streams in the format context */
if ((err = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
print_error(filename, err);
return err;
}
av_dump_format(fmt_ctx, 0, filename, 0);
/* bind a decoder to each input stream */
for (i = 0; i < fmt_ctx->nb_streams; i++) {
AVStream *stream = fmt_ctx->streams[i];
AVCodec *codec;
if (stream->codec->codec_id == AV_CODEC_ID_PROBE) {
fprintf(stderr, "Failed to probe codec for input stream %d\n",
stream->index);
} else if (!(codec = avcodec_find_decoder(stream->codec->codec_id))) {
fprintf(stderr,
"Unsupported codec with id %d for input stream %d\n",
stream->codec->codec_id, stream->index);
} else if (avcodec_open2(stream->codec, codec, NULL) < 0) {
fprintf(stderr, "Error while opening codec for input stream %d\n",
stream->index);
}
}
*fmt_ctx_ptr = fmt_ctx;
return 0;
}
static void close_input_file(AVFormatContext **ctx_ptr)
{
int i;
AVFormatContext *fmt_ctx = *ctx_ptr;
/* close decoder for each stream */
for (i = 0; i < fmt_ctx->nb_streams; i++) {
AVStream *stream = fmt_ctx->streams[i];
avcodec_close(stream->codec);
}
avformat_close_input(ctx_ptr);
}
static int probe_file(const char *filename)
{
AVFormatContext *fmt_ctx;
int ret, i;
if ((ret = open_input_file(&fmt_ctx, filename)))
return ret;
if (do_show_format)
show_format(fmt_ctx);
if (do_show_streams) {
probe_array_header("streams");
for (i = 0; i < fmt_ctx->nb_streams; i++)
show_stream(fmt_ctx, i);
probe_array_footer("streams");
}
if (do_show_packets)
show_packets(fmt_ctx);
close_input_file(&fmt_ctx);
return 0;
}
static void show_usage(void)
{
printf("Simple multimedia streams analyzer\n");
printf("usage: %s [OPTIONS] [INPUT_FILE]\n", program_name);
printf("\n");
}
static int opt_format(void *optctx, const char *opt, const char *arg)
{
iformat = av_find_input_format(arg);
if (!iformat) {
fprintf(stderr, "Unknown input format: %s\n", arg);
return AVERROR(EINVAL);
}
return 0;
}
static int opt_output_format(void *optctx, const char *opt, const char *arg)
{
if (!strcmp(arg, "json")) {
octx.print_header = json_print_header;
octx.print_footer = json_print_footer;
octx.print_array_header = json_print_array_header;
octx.print_array_footer = json_print_array_footer;
octx.print_object_header = json_print_object_header;
octx.print_object_footer = json_print_object_footer;
octx.print_integer = json_print_integer;
octx.print_string = json_print_string;
} else if (!strcmp(arg, "ini")) {
octx.print_header = ini_print_header;
octx.print_footer = ini_print_footer;
octx.print_array_header = ini_print_array_header;
octx.print_object_header = ini_print_object_header;
octx.print_integer = ini_print_integer;
octx.print_string = ini_print_string;
} else if (!strcmp(arg, "old")) {
octx.print_header = NULL;
octx.print_object_header = old_print_object_header;
octx.print_object_footer = old_print_object_footer;
octx.print_string = old_print_string;
} else {
av_log(NULL, AV_LOG_ERROR, "Unsupported formatter %s\n", arg);
return AVERROR(EINVAL);
}
return 0;
}
static int opt_show_format_entry(void *optctx, const char *opt, const char *arg)
{
do_show_format = 1;
nb_fmt_entries_to_show++;
octx.print_header = NULL;
octx.print_footer = NULL;
octx.print_array_header = NULL;
octx.print_array_footer = NULL;
octx.print_object_header = NULL;
octx.print_object_footer = NULL;
octx.print_integer = show_format_entry_integer;
octx.print_string = show_format_entry_string;
av_dict_set(&fmt_entries_to_show, arg, "", 0);
return 0;
}
static void opt_input_file(void *optctx, const char *arg)
{
if (input_filename) {
fprintf(stderr,
"Argument '%s' provided as input filename, but '%s' was already specified.\n",
arg, input_filename);
exit(1);
}
if (!strcmp(arg, "-"))
arg = "pipe:";
input_filename = arg;
}
void show_help_default(const char *opt, const char *arg)
{
av_log_set_callback(log_callback_help);
show_usage();
show_help_options(options, "Main options:", 0, 0, 0);
printf("\n");
show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
}
static int opt_pretty(void *optctx, const char *opt, const char *arg)
{
show_value_unit = 1;
use_value_prefix = 1;
use_byte_value_binary_prefix = 1;
use_value_sexagesimal_format = 1;
return 0;
}
static const OptionDef real_options[] = {
#include "cmdutils_common_opts.h"
{ "f", HAS_ARG, {.func_arg = opt_format}, "force format", "format" },
{ "of", HAS_ARG, {.func_arg = opt_output_format}, "output the document either as ini or json", "output_format" },
{ "unit", OPT_BOOL, {&show_value_unit},
"show unit of the displayed values" },
{ "prefix", OPT_BOOL, {&use_value_prefix},
"use SI prefixes for the displayed values" },
{ "byte_binary_prefix", OPT_BOOL, {&use_byte_value_binary_prefix},
"use binary prefixes for byte units" },
{ "sexagesimal", OPT_BOOL, {&use_value_sexagesimal_format},
"use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" },
{ "pretty", 0, {.func_arg = opt_pretty},
"prettify the format of displayed values, make it more human readable" },
{ "show_format", OPT_BOOL, {&do_show_format} , "show format/container info" },
{ "show_format_entry", HAS_ARG, {.func_arg = opt_show_format_entry},
"show a particular entry from the format/container info", "entry" },
{ "show_packets", OPT_BOOL, {&do_show_packets}, "show packets info" },
{ "show_streams", OPT_BOOL, {&do_show_streams}, "show streams info" },
{ "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {.func_arg = opt_default},
"generic catch all option", "" },
{ NULL, },
};
static int probe_buf_write(void *opaque, uint8_t *buf, int buf_size)
{
printf("%.*s", buf_size, buf);
return 0;
}
#define AVP_BUFFSIZE 4096
int main(int argc, char **argv)
{
int ret;
uint8_t *buffer = av_malloc(AVP_BUFFSIZE);
if (!buffer)
exit(1);
atexit(exit_program);
options = real_options;
parse_loglevel(argc, argv, options);
av_register_all();
avformat_network_init();
init_opts();
#if CONFIG_AVDEVICE
avdevice_register_all();
#endif
show_banner();
octx.print_header = ini_print_header;
octx.print_footer = ini_print_footer;
octx.print_array_header = ini_print_array_header;
octx.print_object_header = ini_print_object_header;
octx.print_integer = ini_print_integer;
octx.print_string = ini_print_string;
parse_options(NULL, argc, argv, options, opt_input_file);
if (!input_filename) {
show_usage();
fprintf(stderr, "You have to specify one input file.\n");
fprintf(stderr,
"Use -h to get full help or, even better, run 'man %s'.\n",
program_name);
exit(1);
}
probe_out = avio_alloc_context(buffer, AVP_BUFFSIZE, 1, NULL, NULL,
probe_buf_write, NULL);
if (!probe_out)
exit(1);
probe_header();
ret = probe_file(input_filename);
probe_footer();
avio_flush(probe_out);
avio_close(probe_out);
avformat_network_deinit();
return ret;
}
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