[FFmpeg-trac] #1607(avformat:new): av_seek_frame() without AVSEEK_FLAG_ANY on mpg files returns success without seeking to a keyframe

[FFmpeg]

#1607: av_seek_frame() without AVSEEK_FLAG_ANY on mpg files returns success
without seeking to a keyframe
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             Reporter:  mbradshaw   |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by DonMoir):

 I don't think the above is the solution and in fact it may break a lot of
 applications.

 I think the real solution is to make seeking to a timestamp work as it is
 supposed to, which is seeking to a keyframe. This would involve
 fixing/adding seek code for mpeg related code. I think now it just uses
 the generic seek code.

 Work arounds for this are clumsy where it probably is fairly easy to fix
 for someone knowledgeable in this area. Also, fixing it once in the place
 it should be fixed means many others don't have to spend time on it.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1607#comment:1>
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