[FFmpeg-trac] #504(undetermined:new): Fixing av_seek_frame

[FFmpeg]

#504: Fixing av_seek_frame
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             Reporter:  DonMoir      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by DonMoir):

 On that AspectRatioHB.mpg file, if I do a avio_seek on the postion of the
 first frame and then update the timestamp (which is negative for that
 frame), on the first read using av_read_frame, you will not get that first
 frame packet. You will get some packet in the middle and that will produce
 incorrect results. It's like it skipped frames and the key first frame was
 never decoded.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/504#comment:2>
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