AVMutableVideoComposition with AVMutableVideoCompositionLayerInstruction shows black video when played with AVPlayer in certain cases [Simulator ONLY]

Number:rdar://FB9983556 Date Originated:04-14-2022
Status:Open Resolved:
Product:iOS Product Version:15.3
Classification:AVFoundation Reproducible:YES
A very simple video stitching implementation done via `AVMutableComposition`, `AVMutableVideoCompositionInstruction` and `AVMutableVideoCompositionLayerInstruction` shows black video when played with AVPlayer in certain cases.

One can feed a tiny translation matrix (like offset 1e-9) to `layerInstruction`, then rebuild and rerun again, the video can be played properly on simulator without any issues.

The issue does NOT reproduce on real devices, so it could be a simulator ONLY issue.


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