I have a .MP4 movie exported from Blender in 24fps in good quality, without any pixelation problems. In whatever movie player I open it, there are no pixelation problems.
When I create a new project in Final Cut, also in 24fps, and I import the clip, and I play it in Final Cut as such, even in the Timeline viewer (same problem after exporting from Final Cut), then every 18th or 19th frame gets pixelation problems as such:
How to solve please? Should I prepare the Blender movie in another file format?
For your reference, here is an undistorted frame:
The problem remains if I make a short (1-sec) small-resolution (550x550) sample.
Again, the 19th frame is distorted:
It should look more like this:
Here are my render settings for this small-resolution sample: