openharmony/third_party_ffmpeg
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guess framerate

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Originally committed as revision 2866 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-03-10 03:45:14 +00:00
parent c276af0471
commit bb01a3f021
1 changed files with 14 additions and 3 deletions
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17
libavformat/flvdec.c
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@ -40,11 +40,15 @@ static int flv_probe(AVProbeData *p)
return 0;
}
#define FRAME_RATE_UNKNOWN 31415 //yes i know its beatifull
static int flv_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
int offset, flags;
AVStream *st;
s->ctx_flags |= AVFMTCTX_NOHEADER; //ok we have a header but theres no fps, codec type, sample_rate, ...
av_set_pts_info(s, 24, 1, 1000); /* 24 bit pts in ms */
@ -57,8 +61,9 @@ static int flv_read_header(AVFormatContext *s,
return AVERROR_NOMEM;
st->codec.codec_type = CODEC_TYPE_VIDEO;
st->codec.codec_id = CODEC_ID_FLV1;
st->codec.frame_rate= ap->frame_rate;
st->codec.frame_rate_base= ap->frame_rate_base;
st->codec.frame_rate= FRAME_RATE_UNKNOWN;
// st->codec.frame_rate= ap->frame_rate;
// st->codec.frame_rate_base= ap->frame_rate_base;
}
if ((flags & 4)) {
@ -118,11 +123,17 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
}
goto skip;
found:
if(type == 8){
if(type == 8 && st->codec.sample_rate == 0){
st->codec.channels = (flags&1)+1;
st->codec.sample_rate = (44100<<((flags>>2)&3))>>3;
}
//guess the frame rate
if(type==9 && st->codec.frame_rate == FRAME_RATE_UNKNOWN && pts){
st->codec.frame_rate_base=1;
st->codec.frame_rate= (1000 + pts/2)/pts;
}
if (av_new_packet(pkt, size) < 0)
return -EIO;