[FFmpeg-trac] #5946(avfilter:new): Lavfi & filter_complex ignore codec and pixel format

[FFmpeg]

#5946: Lavfi & filter_complex ignore codec and pixel format
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             Reporter:  LordHDL   |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avfilter  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 '''Summary''': When using filtergraphs, the output video will default to
 `yuva420p` instead of being based on the codec chosen.  If pixel format is
 manually specified, it will be reflected in the stream details but not in
 the actual output video.
 '''How to reproduce''': Use the `-c:v` and `-pix_fmt` commands after using
 `-lavfi` or `-filter_complex`.
 {{{
 ffmpeg -loop 1 -i ~/Desktop/FP2.tiff -i ~/Desktop/fp.mov -lavfi \
 "[1:v]fps=60[video]; \
  [0:v][video]overlay=50:200:shortest=1[final]" \
 -map "[final]" -map 1:a -c:v ffv1 -level 3 -c:a copy
 ~/Desktop/filtergraph.nut
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5946>
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