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In mov muxer, compute avg bitrate in esds

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This commit is contained in:
Baptiste Coudurier
2011-04-16 16:19:10 -07:00
parent 1aeb88b77d
commit 0ba8485666
4 changed files with 17 additions and 8 deletions
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19
libavformat/movenc.c
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@@ -247,10 +247,20 @@ static void putDescr(AVIOContext *pb, int tag, unsigned int size)
avio_w8(pb, size & 0x7F);
}
static unsigned compute_avg_bitrate(MOVTrack *track)
{
uint64_t size = 0;
int i;
for (i = 0; i < track->entry; i++)
size += track->cluster[i].size;
return size * 8 * track->timescale / track->trackDuration;
}
static int mov_write_esds_tag(AVIOContext *pb, MOVTrack *track) // Basic
{
int64_t pos = avio_tell(pb);
int decoderSpecificInfoLen = track->vosLen ? 5+track->vosLen : 0;
unsigned avg_bitrate;
avio_wb32(pb, 0); // size
ffio_wfourcc(pb, "esds");
@@ -282,11 +292,10 @@ static int mov_write_esds_tag(AVIOContext *pb, MOVTrack *track) // Basic
avio_w8(pb, track->enc->rc_buffer_size>>(3+16)); // Buffersize DB (24 bits)
avio_wb16(pb, (track->enc->rc_buffer_size>>3)&0xFFFF); // Buffersize DB
avio_wb32(pb, FFMAX(track->enc->bit_rate, track->enc->rc_max_rate)); // maxbitrate (FIXME should be max rate in any 1 sec window)
if(track->enc->rc_max_rate != track->enc->rc_min_rate || track->enc->rc_min_rate==0)
avio_wb32(pb, 0); // vbr
else
avio_wb32(pb, track->enc->rc_max_rate); // avg bitrate
avg_bitrate = compute_avg_bitrate(track);
// maxbitrate (FIXME should be max rate in any 1 sec window)
avio_wb32(pb, FFMAX3(track->enc->bit_rate, track->enc->rc_max_rate, avg_bitrate));
avio_wb32(pb, avg_bitrate);
if (track->vosLen) {
// DecoderSpecific info descriptor