This post is a guide to modifying the official encoding package scripts to use 64-bit programs and plugins, and to take advantage of the multithreading capabilities of AviSynth+. Moving the entire pipeline over to 64-bit programs has the advantage of allowing the encoding script to be previewed in x64 VirtualDub, which handles 4K content much better than its x86 counterpart. Multithreading modifications improve encoding performance in general (especially for 4K encodes). In my case, my encoding speed improved by 4X for the HD encode after these changes. AviSynth+ For any of this stuff to work, you will need to be using AviSynth+. You can download the installer from here: https://github.com/AviSynth/AviSynthPlus/releases/ I don't know how AviSynth works if you use a "files only" package, so this guide is going to assume that you install AviSynth+. You probably need to uninstall other versions of AviSynth you might have. Back up your plugins directories before you uninstall! 64-bit Conversion Downloads You will need to get 64-bit versions of all the plugins that are used in the encode.avs script.For the global.bat batch script, you will need the following 64-bit versions of programs:
- ExactDedup: https://archive.org/download/exactdedup/ExactDedup_25%2626_x86_x64_dll_v0-06_20190215.zip
- MVTools: https://github.com/pinterf/mvtools/releases
- MaskTools2: https://github.com/pinterf/masktools/releases/
- AutoLevels: http://www.mediafire.com/file/8k2vubr57yw1yp3/AutoLevels_25%252626_x86_x64_dll_v0.12Beta3_20190711.zip/file
- FreeSub: https://github.com/Zinfidel/freesubplus (the precompiled .dll in this repository is the 64-bit version you need)
- AssRender: https://github.com/pinterf/assrender
Installation You can just throw the 64-bit plugins into the programs folder and reference them with the LoadPlugin lines in encode.avs, or even better, use AviSynth+'s autoloading feature and instead put your x86 and x64 plugins in C:\Program Files (x86)\AviSynth+\plugins64+ and C:\Program Files (x86)\AviSynth+\plugins+ directories, respectively, and delete the LoadPlugin lines. For global.bat, the only change(s) that need to be made are to change each instance of avs2pipemod to avs2pipemod64, or just rename the 64-bit version to avs2pipemod and replace the 32-bit version with it. Change the reference to ffmpeg (for VirtualBoy) to point to the 64-bit executable. Multithreading Read this wiki for more information on these changes: http://avisynth.nl/index.php/AviSynth+#MT_Notes Add this line to the top of encode.avs:
- avs2pipemod64: https://github.com/chikuzen/avs2pipemod/releases
- ffmpeg: https://ffmpeg.zeranoe.com/builds/ (Only for Virtual Boy encodes)
This automatically sets all plugins that can use multithreading modes to use a safe multithreading mode. As you might have read in the linked wiki article, to actually make AviSynth+ use multithreading, you need to add a call to Prefetch to the bottom of your script as well, but there's a complication for us. The ExactDedup plugin requires strictly serial playback of video during its analysis pass, and multithreading will break this in strange and mysterious ways. So, to account for this, add this line to the bottom of the script instead:Language: avisynthSetFilterMTMode("DEFAULT_MT_MODE", MT_MULTI_INSTANCE)This will prevent multithreaded execution for the modern encode that uses ExactDedup during the analysis phase. (NOTE: this issue can also probably be solved using the MT_SERIALIZED mode for ExactDeDup but I have not tested this). Change the argument for Prefetch to a number that makes sense for your system!. Read the wiki for more information on sane values. My system has 8 logical cores, but setting the value to use all logical cores actually causes performance to take a hit, and Windows gets really upset. Setting it to logical cores - 1 gave me the best results for my system. That's all it takes. I got a very noticeable performance boost for 4K encodes by doing this, and a smaller boost to the SD encodes. VDub64 handles previews for HD encodes a lot better as well.Language: avisynthpass != 1 ? Prefetch(7) : last
I have an i5-9600k (6cores, 6threads, 3.7GHz - Turbo 4.7GHz) i will get good improvements with this method? (normally i get 120fps for 720p encoding and 30fps for 1080p)
