[Mjpeg-users] y4mscaler: weird picture

[Dik Takken]

Hi,
I recently switched from yuvscaler to y4mscaler for reasons known to 
some of you ;) and came across a problem: The croma data in the image 
that has been processed via y4mscaler looks weird. I compared the 
output of the command

smil2yuv -i 2 test.dv | y4mscaler -O chromass=420_MPEG2 -S option=sinc:4 | 
yuvcorrect -Y LUMINANCE_1.0_16_235_127_127 -Y 
CHROMINANCE_0.0_4_128_4_128_16_240 | yuvplay

to

smil2yuv test.dv | yuvcorrect -Y LUMINANCE_1.0_16_235_127_127 -Y 
CHROMINANCE_0.0_4_128_4_128_16_240 | yuvplay

The difference is attached to this mail. I tried playing with the -S 
option of y4mscaler, but I did not manage to get a decent picture.

What is it that I'm doing wrong?

Dik
<<attachment: compare.jpg>>