Compare compressed AVI files with Avisynth

[dnaxx]

Hello,

I am trying to compare compressed destination files with an uncompressed source this way:

source=AviSource("D:\Uncomp.avi")
target=AviSource("D:\CinepakNormal.avi")
psnrfile=("D:\cinepak_normal.psnr")

rgbsource=ConvertToRGB24(source)
rgbtarget=ConvertToRGB24(target)
Compare(rgbsource,rgbtarget,"",psnrfile)


With the Windows Media Codec 9 it works this way. But with all other codecs (DivX, XVid, Cinepak, Indeo, HufYUV, ...) it does not work.

Does someone know why it does not work and how to fix it?

Thanks,

[stickboy]

Originally posted by dnaxx
But with all other codecs (DivX, XVid, Cinepak, Indeo, HufYUV, ...) it does not work.

Does someone know why it does not work and how to fix it?Could you describe exactly what happens? Just saying "it does not work" is rather vague.

[dnaxx]

in "cinepak_normal.psnr" just these lines are added:

Comparing channel(s) RGB

Mean Max Max
Absolute Mean Pos. Neg.
Frame Dev. Dev. Dev. Dev. PSNR (dB)
-----------------------------------------------------



Total frames processed: 0

Minimum Average Maximum
Mean Absolute Deviation: 0.0000 -1.#INF 0.0000
Mean Deviation: -0.0000 +1.#INF -0.0000
PSNR: -0.0000 1.#INF -0.0000
Overall PSNR: -1.#IND

[ObiKenobi]

Try converting it to YUY2 instead of RGB and see if that makes any difference.