[FFmpeg-trac] #8941(undetermined:closed): Wrong color levels with kmsgrab and vaapi

[FFmpeg]

#8941: Wrong color levels with kmsgrab and vaapi
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             Reporter:  kokoko3k     |                    Owner:  (none)
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:  invalid
             Keywords:  kmsgrab      |               Blocked By:
  vaapi color levels                 |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Changes (by Balling):

 * status:  new => closed
 * resolution:   => invalid

Comment:

 Okay, I am closing this. --video-output-levels=limited only affects the
 display (i.e. output). That means that otherwise your display is set to
 limited but you somehow misconfigured it to full (as you said yourself).
 This is also not a duplicate of #8862.

 Again, the problem like this cannot be fixed by boot hacks, because all OS
 depends on this metadata. As for how to set metadata for file... very
 simple.

 -vf scale=out_range=pc -color_range pc, since swscale defaults to limited
 range bt.601 (zscale default to source range).


 >but it sets the wrong one

 This is called selectable quantisation and if available on YCbCr can cause
 all kind of problems since nothing supports that.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/8941#comment:13>
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