I've been doing some minor post production compositing on a short film we're finishing, and I'm noticing I'm getting some strange artifacts at one of the stages:
My workflow is editing in FCP, and doing any compositing work in Shake. The footage was originally shot on Varicam. What I do is bring the raw plate into Shake (which was originally shot on Varicam), do my comp work, then output the new version as '8-bit uncompressed 4:2:2'. If I re-import the new composited shot back into shake, and compare it frame by frame with the plate, they are identical. No artifacting, no increase in noise etc... 0 difference. But when I bring these same 2 shots into FCP and compare them, there's subtle differences. The new uncompressed 8 bit 4:2:2 movie has more defined noise, as if I ran a gamma curve on it, and some strange 'blocky' artifacts in dark areas. What is FCP doing to my footage? What step could I be missing in my workflow? Should I be bringing my new composited 'uncompressed' shot into Compressor and converting it back to DVCPRO format?
Currently, my project settings in FCP are set to read the footage as DVCPRO.
Any help or clarification is greatly appreciated. Thanks!
Edited by Andre LeBlanc, 24 May 2008 - 12:19 PM.