I'm new here. My name is Steve. I started using Final Cut Pro X 2 months ago.
My first 2 or 3 videos were fine. But since 1 month i got a lot of glitch after my video export !
I tried to export with Master / Apple Device 4k / Compressor, but always got this glitches.
Here is a sample of my exported video with glitch part :
First, go to Preferences, and turn OFF "Background Rendering" and NEVER turn it back on.
Second, select the Library in the Browser, then go to the File menu, to "Delete Generated Library Files" and delete ALL render files.
Third, when exporing use H.264, not the Apple Devices preset.