[FFmpeg-trac] #6358(ffmpeg:open): ffmpeg requires constant output dimensions (was: Video to images functionality does not take SAR into account)

[FFmpeg]

#6358: ffmpeg requires constant output dimensions
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             Reporter:  01sas        |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  ffmpeg
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
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Changes (by cehoyos):

 * status:  new => open
 * reproduced:  0 => 1
 * priority:  normal => wish
 * version:  3.2.4 => git-master
 * type:  defect => enhancement


Comment:

 For future tickets: Please remember to always test current FFmpeg git
 head.

 Even if the output format allows changing dimensions, `ffmpeg` forces the
 same dimension for the whole duration of the output video stream (while
 output aspect ratio change is allowed). I don't think this is related to
 aspect ratio (although input with changing aspect ratio allows to
 reproduce the issue, as does input with changing dimenstions). The filter
 chain works fine as can be tested with `ffplay`.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6358#comment:1>
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