auto_deband changes/improvements

[NSQY]

• [ ] downsample_h can unexpectedly break. tracking upstream: https://github.com/AkarinVS/vapoursynth-plugin/issues/9
• [ ] Add cambi_mask bool to toggle mask from CAMBI map. Sometimes the provided mask is not accurate enough, particularly around the edges of objects.
• [ ] anti-dither filter is useful for some inputs and only present when the input is 8-bit. bool?
• [ ] Investigate pre-filter validity: https://github.com/Setsugennoao/vs-deband/issues/94 :pray:

[Setsugennoao]

Thanks for opening the issue.

For the first problem, there also seems to be an issue when the clip is not 16/9. I'll probably try to put a workaround and then update once akarin fixes upstream.

For the second, do you also suggest passing your own mask or should it be handled separately by the user later on?

For the third, what do you mean by anti-dither filter? You mean passing Dither.NONE instead of Dither.ERROR_DIFFUSION?

[NSQY]

For the second, do you also suggest passing your own mask or should it be handled separately by the user later on?

I have no suggestion, seems easiest to just let the user handle it afterwards. Functions such as f3kpf are already rather good at preventing excessive detail loss.

For the third, what do you mean by anti-dither filter? You mean passing Dither.NONE instead of Dither.ERROR_DIFFUSION?

https://github.com/AkarinVS/vapoursynth-plugin/wiki/CAMBI#additional-notes

[NSQY]

Need more samples but consider calling a simple pre-filter before CAMBI to improve consistency when resampling (particularly relevant at 10-bit): [1, 1, 0, 1, 1, 0, 0, 0, 0]

[LuisB79]

has there been any update with this?