[FFmpeg-trac] #7306(ffmpeg:new): Seeking problem: -ss as output parameter at a key frame of a mp4 and -c copy result in droping of video frames

[FFmpeg]

#7306: Seeking problem: -ss as output parameter at a key frame of a mp4 and -c
copy result in droping of video frames
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             Reporter:  duanyao     |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by duanyao):

 By the way, -ss as an input parameter doesn't drop frames, but result in
 much longer duration (3.44s):

   ffmpeg -report -y -ss 2.36 -t 1 -i neck5.mp4 -c copy neck5-1.mp4

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Ticket URL: <https://trac.ffmpeg.org/ticket/7306#comment:1>
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