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Is there any way to fix this? Also happens when I export as 1080p, it also takes about 10 hours to export each time, but ends up black & white..! It's a video I edited in iMovie but it needs rotating.
MacBook Pro 15″, macOS 10.15
...forgot to mention I am using Quicktime 10.5!
4K video exports as black and white when flipping from horizontal to vertical
