[FFmpeg-trac] #11541(avcodec:new): All NVENC encoders change bt709 color space to bt470bg when pixel format is not specified

[FFmpeg]

#11541: All NVENC encoders change bt709 color space to bt470bg when pixel format is
not specified
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             Reporter:  fmnijk       |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  colorspace   |               Blocked By:
  NVENC scale                        |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 >color space gets incorrectly set to bt470bg instead of bt709 when not
 explicitly specifying a pixel format.

 Pixel format has nothing to do with colorspace/primaries/transfer. It is
 completly unrelated, well, besides xyz12 and rgb stuff, where colorspace
 is set to 0. E.g. pixel format P010 may be SDR 10 bit.

 It is expected that BT.601 is default matrix in most situations. There is
 no bug here, you have to force bt709 matrix or bt2020-ncl matrix if you
 need it.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11541#comment:4>
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