[FFmpeg-cvslog] flvdec: follow packets backward until a valid last timestamp is found
Michael Niedermayer
git at videolan.org
Fri Aug 3 14:51:06 CEST 2012
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Aug 3 14:41:18 2012 +0200| [231ffb9243e5286b7c3d5806fa8f3142c72bfe15] | committer: Michael Niedermayer
flvdec: follow packets backward until a valid last timestamp is found
Fixed Ticket981
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=231ffb9243e5286b7c3d5806fa8f3142c72bfe15
---
libavformat/flvdec.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index fb356b8..2c342bb 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -748,15 +748,22 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE) && !flv->searched_for_end){
int size;
const int64_t pos= avio_tell(s->pb);
- const int64_t fsize= avio_size(s->pb);
+ int64_t fsize= avio_size(s->pb);
+retry_duration:
avio_seek(s->pb, fsize-4, SEEK_SET);
size= avio_rb32(s->pb);
avio_seek(s->pb, fsize-3-size, SEEK_SET);
if(size == avio_rb24(s->pb) + 11){
uint32_t ts = avio_rb24(s->pb);
ts |= avio_r8(s->pb) << 24;
- s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
+ if(ts)
+ s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
+ else if (fsize >= 8 && fsize - 8 >= size){
+ fsize -= size+4;
+ goto retry_duration;
+ }
}
+
avio_seek(s->pb, pos, SEEK_SET);
flv->searched_for_end = 1;
}
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