[FFmpeg-trac] #10150(undetermined:open): Variable framerate with a maximum value

[FFmpeg]

#10150: Variable framerate with a maximum value
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             Reporter:  Zoont        |                    Owner:  (none)
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  fps          |               Blocked By:
  framerate vfr cfr vsync            |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Gyan):

 There's another side-effect of disallowing `-r` in VFR mode. Some encoders
 (most notably x264) modulate their ratecontrol based on the set framerate.
 Higher the rate, lower the quality. This could earlier be used to encode
 sparse slideshow streams while controlling output stream size. Now ffmpeg
 is limited to using the input probed frame rate if VFR is to be
 maintained. And the wrapper sets the rate based on the avctx framerate.
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Ticket URL: <https://trac.ffmpeg.org/ticket/10150#comment:5>
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