I have used and installed AviSynth+ 64-bit on a machine. I then wanted to install AviSynth+ 32-bit to use the watermark filter. I followed these instructions to install 32-bit, changed the registry keys, and got a blue screen of death.

After a fresh reinstallation of the Windows system, I want to install 32-bit AviSynth+ only and avoid another blue screen of death.

On the new version 3.5.1 of AviSynth+, is XP the 32-bit version, or is any installer able to install a 32-bit version?

1 Answer 1


There is no problem with having installed both 32- and 64-bit version of AviSynth on your 64-bit machine, if you correctly placed 32-bit plugins vs. 64-bit ones to their appropriate places.

AviSynth is a frame server, it means, you never call it directly - other program call it back. It means that for example

  • 64-bit Media Player Classic will call the 64-bit version of AviSynth,
  • 32-bit Media Player Classic will call the 32-bit version of AviSynth.


  • 64-bit FFmpeg will call the 64-bit version of AviSynth,
  • 32-bit FFmpeg will call the 32-bit version of AviSynth.

I guess that your problem lies in your FFmpeg installation — you have probably 64-bit, and it means that in the process of converting your .avs script to some media file the FFmpeg calls 64-bit version of AviSynth, and you need the 32-bit (because of your 32-bit filter).

So my advice is, install both 32- and 64-bit versions of FFmpeg (into different directories) and use the appropriate one for every particular case.

  • I do not see a folder C:\Program Files (x86)\AviSynthor C:\Program Files\AviSynth. Where is AviSynth installed, so I can copy plugins there? And I do not see a 32-bit version of Media Player Classic at the K-Lite codec pack mega, where can I get the 32-bit version of Media Player Classic? May 17, 2020 at 20:48
  • 1
    "Where is AviSynth installed?" See the Registry, key HKEY_LOCAL_MACHINE\SOFTWARE\Avisynth for 64-bit, HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Avisynth for 32-bit.
    – MarianD
    May 17, 2020 at 23:02
  • 1
    K-Lite codec pack installs both 32- and 64-bit version of Media Player Classic, c:\Program Files (x86)\K-Lite Codec Pack\MPC-HC\mpc-hc.exe is 32-bit, c:\Program Files (x86)\K-Lite Codec Pack\MPC-HC64\mpc-hc64.exe is 64-bit.
    – MarianD
    May 17, 2020 at 23:06
  • I found the location of installation by launching the Registry Editor app and going to those paths: AviSynth+ 64-bit is at C:\Program Files (x86)\AviSynth+`, AviSynth+ 32-bit shows the path where I extracted the universal installer, say C:\Users\<user>\Downloads\UniversalAvisynthInstaller\AVSPLUS_x86. K-Lite only installed the 64-bit version and C:\Program Files (x86)\K_Lite Codec Pack` has no MPC-HC directory. May 19, 2020 at 16:55
  • 1
    Please try find mpc-hc.exe and mpc-hc-64.exe by other way — IMHO the best way is to install and use Everything — it's for free and very useful.
    – MarianD
    May 19, 2020 at 18:23

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.