suggestions for colour correction

[DrP]

I have a set top box that is outputting slightly crappy video and need to adjust video that is captured from it to bring it back as close as possible to the source.

Fixing the contrast is easy, but can anyone offer any advice as to how to fix up the colour side of things, preferrably without changing colour format back and forth (its yv12).

If you look at the original (http://img206.imageshack.us/img206/6980/image11zj.jpg) you'll see that the red is a nice pure red, while in the capture (http://img206.imageshack.us/img206/6933/image28qb.jpg) of the output of the STB, there is some blue and green in there as well. The same sort of thing can be seen in the other coloured areas.

Thanks to ImageShack for Free Image Hosting (http://imageshack.us)

[AVIL]

Hi,

You can try with internal avisynt filter "tweak" as it seems to me a lost in saturation. More complete control with another internal filter "coloryuv". With this you can alter gamma for each plane. At last you can try brabudu's "expsat" external filter. Read this post:

http://forum.doom9.org/showthread.php?t=97052

Good luck

[Guest]

Looks like you are using a composite connection. Can you use S-Video or component?

[DrP]

Would that I could. Unfortunately only composite is available.