[FFmpeg-trac] #6260(avcodec:reopened): NVENC H.264 encoding causes aliasing / stair-stepping colors, worse on interlaced than progressive

[FFmpeg]

#6260: NVENC H.264 encoding causes aliasing / stair-stepping colors, worse on
interlaced than progressive
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             Reporter:  alexpigment  |                    Owner:
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  NVENC        |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  1            |
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Comment (by alexpigment):

 Yes, adding -pix_fmt nv12 does indeed fix the problem! Thanks for that
 tip, tbucher.

 This does make me wonder what to do with this issue. Do we consider this
 an issue with yuv420p that needs to be addressed, or should nv12 become
 the default selection when nothing is explicitly set? I know that with
 h264_qsv, yuv420p is not even an option and it will fall back to nv12 even
 if you specify yuv420p explictly.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6260#comment:7>
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