[FFmpeg-trac] #814(swscale:closed): rgb24 -> yuv420p conversion is not precise?

[FFmpeg]

#814: rgb24 -> yuv420p conversion is not precise?
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             Reporter:  ami_stuff    |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:  swscale
              Version:  unspecified  |               Resolution:  wontfix
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by michael):

 Try this:
 ffmpeg -i tetest.tif -sws_flags
 lanczos+accurate_rnd+full_chroma_int+full_chroma_inp -pix_fmt yuv420p
 out.y4m
 ffmpeg -i out.y4m -sws_flags
 lanczos+accurate_rnd+full_chroma_int+full_chroma_inp out.bmp

 and view the bmp with something not based on SDL (that is something not
 converting to YUV420 again)

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/814#comment:5>
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