Chroma shift in VirtualDub?
 

I ran a test with a test chart graphic in Virtualdub. I output it using Lagarith as an avi. I placed the render back into Virtualdub and rendered it again. I did this 5x. The luminance looks pretty good, but the chroma shifts left with every render.

Is this normal?
Is there a correction filter?
Is this because of 4.2.2 rather that 4.4.4?

I did the same test in Vegas Pro and it shifted more.

It's probably due to multiple 4:2:2 -> RGB -> 4:2:2 conversions. There's a reason we always try to process video natively. :)

You shouldn't be seeing this if you used Fast Recompress mode though.

In VirtualDub, be sure to change input and output decode modes to YUY2.

Video > Color Dept, or
Video > Decode Format

I never noticed that was even an option! :cool2: