Delowpass, how?

[tormento]

More and more BDs are lowpassed to save some space (what for?).

I saw that VapourSynth has some scripts and functions to "delowpass", is there anything similar for AVS+?

[Z2697]

basically you have a non-lowpassed reference and do stuff
who said it's for space saving?

[orchid]

Since this process was only developed recently by the anime scene (which has been exclusively vapoursynth since late 2017), AVS does not have any equivalent utilities made for it.

[tormento]

Since this process was only developed recently by the anime scene (which has been exclusively vapoursynth since late 2017), AVS does not have any equivalent utilities made for it.
I've looked at the script for VS (https://github.com/Jaded-Encoding-Thaumaturgy/vs-jetpack/blob/316e8d82a93ef061ee86724713bc2499cdf74ff2/vsdenoise/freqs.py#L37) and there is nothing more than a frequency replacement, if another source is available, or some frequency mixing if there is only one source (as far as I can understand).

Don't think that it's impossible to do it with AVS+.

Any idea?

[Z2697]

JET fanbois love boasting

[Z2697]

But WHO SAID IT'S FOR SAVING SPACE?
The lowpAss iTself alone can't saVe spacE if blu-ray bitrate is the SAME

[real.finder]

I've looked at the script for VS (https://github.com/Jaded-Encoding-Thaumaturgy/vs-jetpack/blob/316e8d82a93ef061ee86724713bc2499cdf74ff2/vsdenoise/freqs.py#L37) and there is nothing more than a frequency replacement, if another source is available, or some frequency mixing if there is only one source (as far as I can understand).

Don't think that it's impossible to do it with AVS+.

Any idea?

maybe try ask https://github.com/Asd-g/AviSynthPlus-Scripts/issues

[orchid]

I've looked at the script for VS (https://github.com/Jaded-Encoding-Thaumaturgy/vs-jetpack/blob/316e8d82a93ef061ee86724713bc2499cdf74ff2/vsdenoise/freqs.py#L37) and there is nothing more than a frequency replacement, if another source is available, or some frequency mixing if there is only one source (as far as I can understand).

Don't think that it's impossible to do it with AVS+.

Any idea?

My point is that there's no pre-existing utils for it in AVS. If you want this, you'll have to write it yourself.
Not just the helper for merging frequencies but also the lowpass filters in use and the various averaging modes.

[tormento]

My point is that there's no pre-existing utils for it in AVS.
Not completely true, we have:

KPassFilterCL (https://github.com/Khanattila/KPassFilterCL)

manyPlus (http://www.avisynth.nl/users/vcmohan/manyPlus/manyPlus.html)

[orchid]

Not completely true, we have:

KPassFilterCL (https://github.com/Khanattila/KPassFilterCL)

manyPlus (http://www.avisynth.nl/users/vcmohan/manyPlus/manyPlus.html)

These filters do not match how anime Blu-rays are being lowpass filtered.

[takla]

More and more BDs are lowpassed to save some space
Thats just your assumption. In actuality, low-passing the video can reduce grain flickering and aliasing.

[tormento]

can reduce grain flickering and aliasing.
That's the whole point of delowpass to recover grain at least.