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[HELP] What noise is that? - Printable Version

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RE: What noise is that? - zspeciman - 22.10.2024

Where is the FilterView Mode located?   Looks like a great tool

RE: What noise is that? - Selur - 22.10.2024

"Filtering->Vapoursynth->Misc->Preview->Split Compare View->FilterView mode"
[Image: grafik.png]
Personally, I rarely use 'difference', normally I use 'Compre view' without 'Split Compare View' or with 'FilterView mode' set to 'interleave' or 'splitYUV&interleaved'. To me, 'difference' is more a gimmick than anything really useful. Smile

Cu Selur

RE: What noise is that? - zspeciman - 22.10.2024

Thanks, I think this will be useful for the artifacts removal, nice to visually see what spots are removed.  Something I'll experiment with.

I was wondering about what order you would go with for this case:
A Black & White video that is a bit shaky, needs to be stabilized (stab), some flickering (ReduceFlicker), needs some cleaning (killerspot) and then colorized (deolodify)
Does the order matter at all?

RE: What noise is that? - Selur - 22.10.2024

I would probably
0. deinterlace, deblock
1.stabiilze
2. crop
3. clean
4. deflicker
5. colorize
as a start, but depending in the source I might adjust it.
Order, like filter settings always matters.

Cu Selur

RE: What noise is that? - Doom83 - 09.12.2024

Hi, from all that filter, what are for fix compression artifact (blockiness ecc...)? 
simply deblock? spatial denoiser (minideen, mclean ecc...)?
Huh

RE: What noise is that? - Selur - 10.12.2024

Different artifacts require different filters.
There is no general filter for general 'compression artifacts'.

Cu Selur

RE: What noise is that? - Doom83 - 12.01.2025

Also here try some filter but I'm never convinced of the result..there are deblock? despot? dont know that kind of noise, it seems more kind of noise and look always like a mess... Confused

RE: What noise is that? - Selur - 12.01.2025

That is just a video where whoever encoded it used a way too low bitrate and thus ended up with tons of macro blocking.
(also at least the sample doesn't seem interlaced but progressive)
Something like DeblockPP7 or DPIR_deblock does work as good as it can, assuming you use way higher than the default values.
But deblockers will only do what they are intended to do, they will smooth sharp edges.
If the blocking was only a few frames visible stuff like Despot, Spotless, RemoveDirt(MC) might also help, but in your case will not help.
Machine based denoisers like DPIR_denoise and SCUNet might help, since they at least sometimes 'add' details.
Your best hope is probably machine learning stuff like BasicVSR++that is meant for restoration,.. or something like CodeFormer.
https://imgsli.com/MzM3NjA4 https://imgsli.com/MzM3NjA5
In the future, there might be Sora&Co based stuff for video restoration (don't know of any project doing this).

Cu Selur

RE: What noise is that? - Doom83 - 15.01.2025

Unfortunately some movies I find are really a mess  Sad cool to try to clean but maybe sometimes it's not worth the effort...

Also in this, in the backgrond, away from the camera, there are like unstable edge at the doors, dont know how to fix  Confused So I can clean the close-up but in backgrond there are that mess

[Image: vlcsnap-2025-01-15-18h16m32s329.jpg]

RE: What noise is that? - Selur - 15.01.2025

Is that the whole thing, or just a section of the source? (300x340 is a rather uncommon resolution)
Assuming it's the whole, it looks bitrate starved.
You will probably have to throw a strong denoisers at something like that.
Some antialiasing might also help.
Note that if you use the Vapoursynth Preview it will probably look worse than it will be in a media player, since point / nearest neighbor resizing is used in the preview (players normally use at least bilinear resizing).
BasicVSR++ + bilinear resizing to 600x680:
[Image: grafik.png]

Cu Selur