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Whenever I move the pointer you can see video getting weird pixelation.

Complete video showing how it behaves in quicktime player: https://jmp.sh/TMaknmp

I am just applying overlay using AVVideoCompositionCoreAnimationTool in AVFoundation.

Video is being created using h264 codec, on iphone 12 device.

I have tried changing codec to hevc but that had no effect.

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