I've tested all the versions of ProRes RAW I have (inc'l 4.3k recorded on Atomos Ninja V from Sony A7SIII and FX6), and I only found one which shows the problem on Intel FCP 10.7.0 and 10.7.1 -- a 4140 x 2330 59.94 fps ProRes RAW HQ clip from a Nikon Z8, apparently recorded in camera, not externally. The file has no info about the Z8 firmware version.
Other users in this thread have reported it on the Panasonic Lumix S1H, recorded on Ninja V, and maybe Sony A1. It may be mostly or partially isolated to Intel, but there's one report on Apple Silicon M1.
The FCP behavior is a black viewer when the timeline or skimmer playhead is halted -- if the viewer is set to Better Performance. If set to Better Quality, it stays black even when playing or skimming.
Attempting to create 50% ProRes Proxies on those clips will hang -- progress wheel does nothing.
Studying the FCP debug log with the terminal "log stream" command shows repeated messages similar to the below. These might imply problems with the management of structures related to color space. The functions containing "FF" refer to the private FCP framework "Flexo", and those containing "HG" refers to a "Helium Graph" data structure, used in the Helium private framework.
Final Cut Pro: (ProCore) assertion failed: displayLinear2020 should only be used for displaying PQ or Linear content. (false) :: HGRef<HGNode> makePQIntoDisplayLinear2020(HGRef<HGNode>, CGColorSpaceRef *, FFPixelFormat **, NSString **, BOOL, BOOL) (file: /Library/Caches/com.apple.xbs/Sources/Flexo/Flexo-41000.67.16/framework/image/FFHGAsyncFanout.mm, line: 2393)
The most expedient solution is stay on 10.6.10 or revert back to 10.6.10. Before upgrading FCP versions, the Final Cut Pro.app package of the previous version should be saved, and also any key FCP libraries currently being used. That provides an easy fallback to the prior version in case of problems.
If this wasn't done, you can often recover the prior FCP .app file and library before the upgrade from a Time Machine or other backup. If you don't have a backup of your library, there might be one in /Movies/Final Cut Backups.
The FCP version of each library can be inspected in Finder by doing right-click>Show Package Contents, selecting the file CurrentVersion.plist, and pressing the space bar (Quick Look). There is a string inside the file showing the library version.
I don't work for Apple, but I've spent a lot of time trying to reproduce this on various machines, and I only have the one Nikon Z8 clip that shows it. We need more information on the specific problem cases, also short ProRes RAW camera files which show the problem. That is unaltered out-of-camera files, not a rendered FCP output or frame grabs. It would help to have detailed MediaInfo output to show the metadata.
I don't know the best way to upload that for examination; maybe Tom could advise.
