Comment by crazygringo

I'm not disagreeing with you as to what could be technically built.

I don't need to provide evidence that the resulting difference in quality is negligible because you can play with ffmpeg to verify it yourself if it want. I'm just telling you from experience.

I understand your logic that it could be built, and how it would skip steps and by definition have no loss of quality in that part. But process- and philosophy-wise it just doesn't fit, that's all I'm explaining.

And the fact that JPEG2000/ProRes are lossy is irrelevant. They're encoded at such high quality settings for masters that they become virtually lossless for practical purposes. That's why the source noise is so high-fidelity in the first place.