[BUG] x264 colormatrix option changes when "Overwrite input type scan" is enabled

[The_Tinkerer]

Just a note, any mpg or mp4 file I load that is 8 bit 4:2:0 always has this comment in the Avisynth script:

#  input color sampling YV12@8, matrix:Rec.709, scantyp: top field first

It's just a comment so it doesn't affect anything... A straight re-encode of a muxed DVD mpg will get correctly processed and set to 601/470bg... but that particular top comment always says Rec.709. The scantyp is correct for progressive or top/bottom field first however. Again, I'm just talking about the comment.