• 1 Post
  • 5 Comments
Joined 1 year ago
cake
Cake day: June 21st, 2023

help-circle

  • Well, if you encode at high bit depth, the removal of the noise won’t create visible banding (at most barely visible at 10 bpc, completely invisible at 12bpc), which was my point. But the generated noise can still prevent banding during playback in case the player doesn’t dither (which they usually don’t by default).

    Denoise-noise-level sets a denoise strength, which affects the denoising done on every frame in case of denoise-noise-level > 0. The denoised frame is then compared with the unaltered frame in some (sadly very unsuitable) way, and then noise is generated based on that calculated difference, and applied to the frame after it is encoded. Because the implementation is so shitty, the visual energy removed during denoising, and the visual energy added with noise synthesis, can diverge drastically.

    So, no matter what denoise-noise-level you choose, the result will be far from optimal. And stronger levels won’t just create unnecessary noise, but also create ugly grain patterns, which can become quite obvious beyond denoise-noise-level 10 or so.