This is probably is a bug report.
I was evaluating various resize methods with an anime source.
Dither_y_gamma_to_linear()
Dither_resize16(1280, 720)
Dither_y_linear_to_gamma()
http://img37.imageshack.us/img37/7812/mawarugamma1.png
ResampleHQ(1280,720,srcmatrix="TV.709",dstmatrix="TV.709",dstcolorspace="YV12",kernel="SPLINE36")
http://img851.imageshack.us/img851/4...warugamma3.png
Spline36Resize(1280,720)
http://img832.imageshack.us/img832/6...warugamma4.png
The PNGs are taken with AvsPmod (Rec.709 matrix).
The luma plane is correct with dither_resize16 and ResampleHQ, which is what I expected.
The chroma planes, instead, look very different with ResampleHQ, the reds are much "darker".
http://img42.imageshack.us/img42/69/mawarugamma5.png
The source frame.
Moreover if we convert to RGB and then resize with ResampleHQ (just use the last png as source, if you want to test), the result is again very different.
http://img42.imageshack.us/img42/6609/mawarugamma6.png
I think there is a bug in how ResampleHQ handles chroma in YV12 mode.