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segment: Add an option for disabling writing of a header/trailer to each segment

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Some segmented formats (such as fragmented mp4) are "bare", as in,
the segment files do not have the same headers/trailers as full normal
files of that format have.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2012-10-02 23:49:46 +02:00
parent eb447d5159
commit 378a6315b7
1 changed files with 19 additions and 12 deletions
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31
libavformat/segment.c
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@ -40,6 +40,7 @@ typedef struct {
float time; /**< Set by a private option. */
int size; /**< Set by a private option. */
int wrap; /**< Set by a private option. */
int individual_header_trailer; /**< Set by a private option. */
int64_t offset_time;
int64_t recording_time;
int has_video;
@ -70,17 +71,19 @@ static int segment_mux_init(AVFormatContext *s)
return 0;
}
static int segment_start(AVFormatContext *s)
static int segment_start(AVFormatContext *s, int write_header)
{
SegmentContext *c = s->priv_data;
AVFormatContext *oc = c->avf;
int err = 0;
avformat_free_context(oc);
c->avf = NULL;
if ((err = segment_mux_init(s)) < 0)
return err;
oc = c->avf;
if (write_header) {
avformat_free_context(oc);
c->avf = NULL;
if ((err = segment_mux_init(s)) < 0)
return err;
oc = c->avf;
}
if (c->wrap)
c->number %= c->wrap;
@ -93,17 +96,20 @@ static int segment_start(AVFormatContext *s)
&s->interrupt_callback, NULL)) < 0)
return err;
if ((err = avformat_write_header(oc, NULL)) < 0)
return err;
if (write_header) {
if ((err = avformat_write_header(oc, NULL)) < 0)
return err;
}
return 0;
}
static int segment_end(AVFormatContext *oc)
static int segment_end(AVFormatContext *oc, int write_trailer)
{
int ret = 0;
av_write_trailer(oc);
if (write_trailer)
av_write_trailer(oc);
avio_close(oc->pb);
return ret;
@ -196,10 +202,10 @@ static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
av_log(s, AV_LOG_DEBUG, "Next segment starts at %d %"PRId64"\n",
pkt->stream_index, pkt->pts);
ret = segment_end(oc);
ret = segment_end(oc, seg->individual_header_trailer);
if (!ret)
ret = segment_start(s);
ret = segment_start(s, seg->individual_header_trailer);
if (ret)
goto fail;
@ -249,6 +255,7 @@ static const AVOption options[] = {
{ "segment_list", "output the segment list", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
{ "segment_list_size", "maximum number of playlist entries", OFFSET(size), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E },
{ "segment_wrap", "number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
{ "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
{ NULL },
};