[FFmpeg-trac] #4080(undetermined:new): AV Foundation frame rate locked to 15 FPS

[FFmpeg]

#4080: AV Foundation frame rate locked to 15 FPS
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             Reporter:  LordHDL       |                     Type:  defect
               Status:  new           |                 Priority:  normal
            Component:  undetermined  |                  Version:  2.4.3
             Keywords:                |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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 Summary of the bug: Cannot change the frame rate of screen recordings
 using AV Foundation.
 How to reproduce: Record video with AV Foundation.
 {{{
 ./ffmpeg -f avfoundation -pix_fmt uyvy422 -video_device_index 3
 -audio_device_index 3 -i "" -framerate 60 -r 60 -c:v libx264 -crf 0 -vf
 crop=426:240:507:339 -c:a pcm_s16le -ar 48000 out.mov
 ffmpeg 2.4.3
 built on November 4, 2014
 }}}

 It currently seems impossible to change the frame rate, and the resulting
 video lags behind the audio.  Example:
 https://www.dropbox.com/s/udl4rrdhgrxmyt5/Left%20side%20426x240.mp4?dl=0

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Ticket URL: <https://trac.ffmpeg.org/ticket/4080>
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