#6574: ffmpeg butchers video quality when downscaling
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             Reporter:  birdie    |                    Owner:
                 Type:  defect    |                   Status:  new
             Priority:  critical  |                Component:  swscale
              Version:  3.2.4     |               Resolution:
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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Comment (by birdie):

 Oops, I've forgotten to add the encoding string:

 ffmpeg -i source.mkv -vf scale=768x342 -c:v libx264 -preset veryslow
 -x264opts keyint=230:min-keyint=23:bframes=16 -crf 0 -tune film result.mkv

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Ticket URL: <https://trac.ffmpeg.org/ticket/6574#comment:1>
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