[FFmpeg-trac] #9811(avfilter:new): filter 'zscale=transfer=linear' fails with "code 2050: active window must be positive"

[FFmpeg]

#9811: filter 'zscale=transfer=linear' fails with "code 2050: active window must
be positive"
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             Reporter:  rminnema     |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avfilter
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
  zimg,zscale,transfer               |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 >The video still looks washed out when I do that. Only tone mapping fixes
 its appearance.

 No, it does not. Are you sure you understasnd how to play HDR?

 >Also I'm unclear on what you're saying I'm wrong about.

 >doesn't have proper HDR metadata
 >The video is thus washed out and oversaturated on SDR displays

 This implication is wrong. HDR metadata is what amakes a video HDR10, not
 HDR. PQ functio0n makes video HDR.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9811#comment:5>
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