Avisynth+ proper MT mode

[yukukuhi]

Hey there folks of Videohelp!
I'm a newbie with Avisynth+ so i want help for setting up the appropriate MT parameter for my script.

Here's my Avisynth script:

MPEG2Source("C:\Users\SGK\Desktop\Comedy Collection\Chinnvar Movie Comedy.d2v")
ConvertToYV12()
qtgmc(preset="slow")
SelectEven()
Crop(14,10, -16,-0)
Spline36Resize(720, 576)
Tweak()
KillAudio()

Also which version of Avisynth+ is the best, stable, fast & effecient?

Please help.

[jagabo]

http://avisynth.nl/index.php/AviSynth%2B#MT_Notes

QTGMC should be able to run in mode 2, MT_MULTI_INSTANCE. For maximum throughput you'll need to set the number of threads to about 2x the number of threads of your CPU.

[Atak_Snajpera]

Actually optimal value for Prefetch is number of physical cores!
https://forum.doom9.org/showthread.php?p=1831323#post1831323

[jagabo]

For maximum speed I find that QTGMC requires 7 or 8 threads on my quad core CPU. At least with AviSynthMT 2.6 (32 bit). I don't know about AviSynth+ in partucular. The OP should play with different values to find what works best for any particular script.

It also matters what encoder and settings are used. With a very fast encoding you want to maximize QTGMC's CPU usage. But with very slow encoding QTGMC CPU use isn't critical. And with some encoders you may need to add Distributor() at the end of the script.

[_Al_]

just fyi, 64bit ,Vapoursynth script is running CPU 100% with QTGMC
also seeing this:
Crop(14,10, -16,-0)
Spline36Resize(720, 576)

not sure what you need this video for, perhaps web, but it is cropped a lot and then resized to non square pixel

[yukukuhi]

Ok. Which is faster Avisynth MT 2.6 or Avisynth+ MT?

[raffriff42]

Ok. Which is faster Avisynth MT 2.6 or Avisynth+ MT?

https://forum.doom9.org/showthread.php?p=1836575#post1836575

...but anyway I recommend last avs+, the mt mode in it is more stable and uptodate than avs mt, and it's recommend whether you use mt or not since it less ram usage* and faster in most cases and has many new things, and there are 64 avs+ that can use more than 4G* of ram without crash and it's faster than 32 in most cases

For me, that says it all - except: 64bit uses somewhat more RAM, but since more RAM is available, it does not run out as easily.

[jagabo]

that says it all

Except: many filters are not available in 64 bit versions.

[Atak_Snajpera]

that says it all

Except: many filters are not available in 64 bit versions.

Examples?

[poisondeathray]

Most commonly used filters have native 64bit versions now

There are a few, like Kassandro's removedirt (the one with restoremotionblocks) that don't yet (it's being worked on by pinter, but vapoursynth has a working 64bit port)

But you can run 32bit filters in a 64bit process with mp_pipeline if there was no native 64bit version