[FFmpeg-trac] #2936(avformat:open): %-syntax for GIF output is not respected, can't write individual frames as images

[FFmpeg]

#2936: %-syntax for GIF output is not respected, can't write individual frames as
images
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             Reporter:  slhck        |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  gif          |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  1            |
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Comment (by cehoyos):

 Iiuc, a command line that used to work (and at least made sense to some
 degree) and did not produce an invalid file (contrary to tickets #2452 vs
 #2684) does not work anymore, I suspect this is how we define a
 regression, especially since reading the communication here in the ticket
 it appears that this wasn't known.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2936#comment:10>
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