[FFmpeg-trac] #7644(undetermined:new): print warning for "-c:v copy" + "-ss non-key-frame"

FFmpeg trac at avcodec.org
Sun Dec 30 13:47:11 EET 2018

#7644: print warning for "-c:v copy" + "-ss non-key-frame"
             Reporter:  hanshenrik   |                     Type:
               Status:  new          |  enhancement
            Component:               |                 Priority:  wish
  undetermined                       |                  Version:
             Keywords:               |  unspecified
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
 as explained in comment 1 of https://trac.ffmpeg.org/ticket/7640#comment:1
 , if you cut a video using  `-c:v copy` + `-ss` and the frame at -ss is
 not a keyframe, then everything until the first keyframe is usually
 rendered black / random colors. it would be nice if ffmpeg printed a
 stderr warning in this scenario, warning that the black/random-color
 frames are expected behavior and not a bug in ffmpeg.

Ticket URL: <https://trac.ffmpeg.org/ticket/7644>
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