[FFmpeg-trac] #2475(avfilter:open): support yuv422p10le in lut filter

[FFmpeg]

#2475: support yuv422p10le in lut filter
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             Reporter:  dericed      |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avfilter
              Version:  git-master   |               Resolution:
             Keywords:  lut          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by dericed):

 For context, QCTools creates a bit plane filter via lutyuv with this
 filterchain:

 ```
 lutyuv=\
 y=bitand(val,pow(2,8-${what_bit_do_you_want}))*pow(2,${what_bit_do_you_want}):\
 u=128:\
 v=128
 ```

 Feasibly the geq filter could do the same work; however both the lut and
 geq filter do not accept >8 bit formats. Ultimately we'd like a way to
 utilize the lower bits of >8 bit formats via the bitand function and
 either lut or geq.

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Ticket URL: <https://trac.ffmpeg.org/ticket/2475#comment:3>
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