[FFmpeg-trac] #7177(undetermined:open): crash when using scale with dst_format on 10 bit HEVC source file

[FFmpeg]

#7177: crash when using scale with dst_format on 10 bit HEVC source file
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             Reporter:  Rollinnn     |                    Owner:  (none)
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  libx264      |               Blocked By:
  crash abort                        |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 THIS IS a bug not just in ultrafast. If you losslessly encode with libx264
 using 3 presets:



 ffmpeg -i x264assert.nut  -vcodec libx264 -qp 0  -an somepreset.mp4


 ffmpeg -i x264assert.nut  -vcodec libx264 -qp 0 -preset ultrafast -an
 ultrafast .mp4

 ffmpeg -i x264assert.nut  -vcodec libx264 -qp 0 -preset placebo -an
 fernfweplacebo.mp4

 (no, cfr 0 is not lossless for 10 bit, as High 10 profile is not lossless)
 the resultant in all cases is different and different with original,
 though placebo is rather close.
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Ticket URL: <https://trac.ffmpeg.org/ticket/7177#comment:10>
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