[FFmpeg-trac] #5198(undetermined:new): FFmpeg flips rawvideo vertically with -vcodec copy

[FFmpeg]

#5198: FFmpeg flips rawvideo vertically with -vcodec copy
-------------------------------------+-------------------------------------
             Reporter:  JasonC       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Log file attached.

 When attempting to trim a video (rawvideo, avi) to a certain length of
 time using -vcodec copy, the output video is vertically flipped (verified
 with mplayer, VLC, Windows Media Player, and the Quicktime player):


 {{{
 ffmpeg -i input.avi -t 120 -vcodec copy -f avi output.avi
 }}}


 A workaround is to use -vcodec rawvideo instead of copy to re-encode the
 video. Doing this, the output is not flipped:

 {{{
 ffmpeg -i input.avi -t 120 -vcodec rawvideo -f avi output.avi
 }}}

 Note that running the flipped video through one more time with -vcodec
 copy does not continue flipping it, the video remains upside down (I make
 this comment because I read https://ffmpeg.org/pipermail/ffmpeg-
 devel/2007-July/029690.html):

 {{{
 ffmpeg -i input.avi -t 120 -vcodec copy -f avi output.avi
 ffmpeg -i output.avi -vcodec copy -f avi output-still-flipped.avi
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5198>
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