On 4/28/2025 7:02 PM, James Almer wrote: > This demuxers reads encapsulation bytes before reading codec data into the > output packets, so take such offset into consideration. > > Signed-off-by: James Almer <jamrial@gmail.com> > --- > libavformat/av1dec.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/libavformat/av1dec.c b/libavformat/av1dec.c > index 8c0b8fe975..38001b124f 100644 > --- a/libavformat/av1dec.c > +++ b/libavformat/av1dec.c > @@ -36,6 +36,7 @@ typedef struct AV1DemuxContext { > AVRational framerate; > uint32_t temporal_unit_size; > uint32_t frame_unit_size; > + int64_t pos; > } AV1DemuxContext; > > //return < 0 if we need more data > @@ -96,6 +97,8 @@ static int av1_read_header(AVFormatContext *s) > if (ret < 0) > return ret; > > + c->pos = avio_tell(s->pb); > + > return 0; > } > > @@ -224,6 +227,7 @@ static int annexb_read_packet(AVFormatContext *s, AVPacket *pkt) > { > AV1DemuxContext *const c = s->priv_data; > uint32_t obu_unit_size; > + int64_t pos = c->pos; > int ret, len; > > retry: > @@ -234,6 +238,7 @@ retry: > } > > if (!c->temporal_unit_size) { > + c->pos = avio_tell(s->pb); > len = leb(s->pb, &c->temporal_unit_size, 1); > if (len == AVERROR_EOF) goto end; > else if (len < 0) return len; > @@ -279,6 +284,9 @@ end: > if (ret == AVERROR(EAGAIN)) > goto retry; > > + if (!ret) > + pkt->pos = pos; > + > return ret; > } Will apply.