[FFmpeg-trac] #5729(avformat:new): FLV key frame index at start may be skipped
FFmpeg
trac at avcodec.org
Mon Jul 25 11:21:02 EEST 2016
#5729: FLV key frame index at start may be skipped
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Reporter: snorlaxzxz | Owner:
Type: defect | Status: new
Priority: important | Component: avformat
Version: git-master | Resolution:
Keywords: flv | Blocked By:
regression | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
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Comment (by snorlaxzxz):
Replying to [comment:5 cehoyos]:
> Replying to [comment:2 snorlaxzxz]:
> > Replying to [comment:1 cehoyos]:
> > > Seeking works fine here for the uploaded sample.
> > > Please provide the command line that allows to reproduce the issue
together with the complete, uncut console output.
> >
> >
> > The issue was introduced since 09ae7b81ea. It may slow down seeking in
online streams.
>
> You could still elaborate on how we can reproduce the issue you see.
The first way:
You can reproduce the issue by accessing this file from a bandwidth
limited web server (like 200KB/s)
It takes tens of seconds to seek to a far position.
Another way:
Set a break point or add an av_log() in `parse_keyframes_index()` in
`libavformat/flvdec.c` .
It will not be called in n3.1.1 but works fine in n3.0
The reason is explained above.
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Ticket URL: <https://trac.ffmpeg.org/ticket/5729#comment:6>
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