Re: roundtip from Windows Resolve back to FCP7 - codec to use

[Ben Scott] "As I have also got a red render bar I am thinking the codec outputting from the PC resolve isnt optimised for FCP e.g. its reading as Apple none (for the YUV outputs) or none (for RGB outputs)"

Your biggest single clue.

When Apple sees "Uncompressed" as "None", then its a Quicktime/file problem; cross-platform from PC/Windows/NTFS to Apple/OSX/MacOS. There are issues with byte-ordering that will cause Quicktime under Mac to fail to see what the codec is when it is transported through NTFS. (I'm assuming you're exporting the graded footage either through a server or an NTFS external hard drive.)

Its possible that a re-render, even cross-rendered back into Apple Uncompressed will cure the problem -- however, there may also be scaling problems inherent in this export path (of the nature 0-1023 / 64-940). Its bad news all around.

Your slight shift in chroma/not luma may be due to the Y'CbCr --> RGB ---> Y'CbCr not being mathematically rigorous, and it cannot be, oweing to round-off errors. But you ARE going to change the values of most of the footage.... right? Otherwise, if you want EXACTLY back what you sent, then ... why are you grading? ;-D

jPo

You mean "Old Ben"? Ben Kenobi?