I'm getting "Error RequestCVPixelBufferForFrame returned: 3 for absolute frame xxx" on a project involving a mix of XAVC Sony A1, and AVC iPhone footage.
Impossible to export the Projects without getting errors. Duplicating doesn't work, XML round trip doesn't work.
What works SOMETIMES, is to force render the Timeline (I usually never render anything), not just once, but multiple times, because one rendering leaves non rendered frames scattered all over. And from one time to another, the frames concerned are different, and their count is different as well.
Eventually after several Render Selected AND Render All commands, the entire Timeline is rendered and the export goes through.
But then, it does not always work.. What a pain.
Please Apple, FIX THIS!!
Mini M1, macOS 12.6.6, FCP 10.6.6
