[FFmpeg-trac] #8879(undetermined:new): ProRes 4444 12-bit encoding

[FFmpeg]

#8879: ProRes 4444 12-bit encoding
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             Reporter:  shijan       |                     Type:
                                     |  enhancement
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  prores       |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 Hello!
 Is it possible to extend ProRes4444 and ProRes4444XQ encoding (render) to
 12-bit depth to match normal ProRes specification?

 I done some bit depth tests here
 https://forum.selur.net/showthread.php?tid=1288 and see that FFmpeg encode
 to ProRes4444/XQ only to 10-bit instead of 12-bit. Same time x265 can easy
 encode to true 12-bit. So i guess technically 12-bit export is not a
 problem?

 If it helps, here are ProRes422HQ 10-bit and ProRes 4444 12-bit gradient
 examples generated in DaVinci Resolve. You can easy see difference between
 10-bit and 12-bit gradient banding when you compress it with levels or
 curves. https://www.dropbox.com/sh/bak63hnr7mnpgbj/AAAf-
 rMK0LvHYTAFjPuQaaxFa?dl=0

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Ticket URL: <https://trac.ffmpeg.org/ticket/8879>
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