I need to composite the people shot against white backgrounds in a spot for the web. BAckground has to be white w NO color shift, or even texture in the background.
I decided to key out the white. so I could have my own neautral white. Looked great. Compression looked great on my desktop monitor..but on a laptop you can see compression banding from the falloff of the key..but only on a laptop monitor.
However, to give you SOME inkling of what's wrong, I'd say it's that H.264 footage. H.264 is an 8-bit codec, AND it has lousy color resolution (aka color sampling). The image quality is good enough to fool the human eye, but not a computer being used for compositing.
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA