Steven Liu <lingjiujia...@gmail.com> 于2024年9月2日周一 16:46写道：
>
> jiangjie <jiangjie...@gmail.com> 于2024年9月2日周一 16:35写道：
> >
> > If the segment is very small, avformat_find_stream_info will read all
> > audio/video data in this segment. cur->is_restart_needed is set to 0 later
> > in dash_read_packet function, and no chance to be set to 1 again in the
> > read_data function.
> >
> > Reproduction:
> > ffmpeg -f lavfi -i mandelbrot -f lavfi -i anullsrc -c:v vp8 -g 5 -r 5 -c:a
> > libopus -use_template 0 -seg_duration 1 -t 15 -y test_720.mpd
> > ffprobe -show_packets test_720.mpd
> >
> > The duration of the test_720.mpd file is 15 seconds, but the duration that
> > ffprobe show is small than 15 second.
> > ---
> > libavformat/dashdec.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
> > index 63070b77be..12960d0312 100644
> > --- a/libavformat/dashdec.c
> > +++ b/libavformat/dashdec.c
> > @@ -2207,9 +2207,9 @@ static int dash_read_packet(AVFormatContext *s,
> > AVPacket *pkt)
> > if (cur->is_restart_needed) {
> > cur->cur_seg_offset = 0;
> > cur->init_sec_buf_read_offset = 0;
> > + cur->is_restart_needed = 0;
> > ff_format_io_close(cur->parent, &cur->input);
> > ret = reopen_demux_for_component(s, cur);
> > - cur->is_restart_needed = 0;
> > }
> > }
> > return AVERROR_EOF;
> > --
> > 2.43.0
> >
> > _______________________________________________
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> >
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>
> good catch
> LGTM
will apply
>
> Thanks
> Steven
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