[FFmpeg-trac] #4614(undetermined:new): sws_dither arguments aren't affecting output in colorspace conversion

[FFmpeg]

#4614: sws_dither arguments aren't affecting output in colorspace conversion
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             Reporter:  surfdog2020  |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  2.6.3        |  undetermined
             Keywords:  sws_dither   |               Resolution:
  dithering                          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by surfdog2020):

 I'm guessing that you wanted me to add '-sws_flags print_info' to my
 command line.  If that is the case, I see no mention of a "specialized"
 converter being used.  I only see the following get added  to my command's
 output:

 SwScaler: reducing / aligning filtersize 1 -> 4
     Last message repeated 1 times
 SwScaler: reducing / aligning filtersize 1 -> 1
 SwScaler: reducing / aligning filtersize 9 -> 8
 [swscaler @ 0x43a9060] bicubic scaler, from yuv422p10le to yuv420p using
 MMXEXT
 [swscaler @ 0x43a9060] 1920x1080 -> 1920x1080
 [swscaler @ 0x43a9060] lum srcW=1920 srcH=1080 dstW=1920 dstH=1080
 xInc=65536 yInc=65536
 [swscaler @ 0x43a9060] chr srcW=960 srcH=1080 dstW=960 dstH=540 xInc=65536
 yInc=131072

 Can you also clarify how one can pass in the "accurate rounding" of the
 internal chroma flags?

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Ticket URL: <https://trac.ffmpeg.org/ticket/4614#comment:5>
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