[FFmpeg-trac] #9066(ffmpeg:new): Enable explicit output extension

[FFmpeg]

#9066: Enable explicit output extension
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             Reporter:  tes45t       |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  normal       |                Component:  ffmpeg
              Version:  git-master   |               Resolution:
             Keywords:  ffmpeg,      |               Blocked By:
  output, file, extension, type,     |
  format                             |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by tes45t):

 @richardpl Have you read the issue entirely? The point is that I
 deliberately want to have different extension in the output file name. For
 example, I want to encode as ".mkv" but I want output file to be
 "file.png". The problem is that there is currently no standard way to
 programmatically retrieve the mapping between output file extensions and
 muxer names (and muxer options). FFmpeg automatically guesses the muxer
 and muxer options when you specify output file extension, but as said, I
 have a lot of use cases when I want to have different extension, or no
 extension at all, but I want FFmpeg to behave like the output file have
 the extension I want. That's why I propose such option. Please let me know
 if anything in the issue is unclear.

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Ticket URL: <https://trac.ffmpeg.org/ticket/9066#comment:4>
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