August 11, 2022, 08:26:54 PM



Windows 11 22H2 (clean Install) Avidemux 2.80

Started by Thors, July 04, 2022, 03:34:02 PM

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Hello all,
Avidemux does not work under Windows 11 22H2 Clean Install.
The program starts but you can not do anything, no reaction.
Can anyone of you help me?


Is the latest 2.8.1 nightly (currently from June 20) affected too?

If it is, could you please elaborate, what

Quote from: Thors on July 04, 2022, 03:34:02 PMThe program starts but you can not do anything, no reaction.

actually means? The window doesn't receive focus? Does it receive file drops? Does Ctrl+O or Ctrl+Q work?

Would you please provide admlog.txt from %localappdata%\avidemux\ directory resulting from launching Avidemux?

I don't have a possibility to test on Windows 11 myself.


Hi, same issue - Avidemux 2.8 and the nightly 2.8.1 don't work under Windows 11 Pro 22H2.

First the window needs extremely long (~20s) to load and when it appears, its not responding. Interacting with it triggers the Windows this-app-doesnt-respond message.

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Thank you, it looks like things start to slow down when Avidemux probes the availability of NVENC-based encoders and really stall when Avidemux starts loading video filters. Maybe it is due to some security software intervening? Nothing goes wrong according to the log, it is just something pulling the brakes when Avidemux starts to load all the DLLs which provide its functionality.


I screenshoted my answer because the forum software gives me a spam error when i post  :-X

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Quote from: new_user on July 12, 2022, 02:47:18 AMNope, its a new installation with drivers and some software like MPC-HD, foobar 2k,...

No snake oil apps or security software except for what Microsoft offerst in Windows 11.

I cannot rule out that this happens due to some file scanning / file signature verification functionality now built into the operating system (similar to what Apple was doing and which greatly prolonged loading time of Avidemux on macOS – if I am not mistaken, it was macOS Catalina – unless one turned off the network connection :o  which allowed Avidemux to start almost instantly). Please try to remove most of video encoder and video filter plugins in Avidemux from its installation directory, just to test the effect.


You need to be more precise what i should delete where :)

Also on which Avidemux, the nightly or the final 2.8 version?


Always the nightly. The release is useful for regression testing only.

Quote from: new_user on July 12, 2022, 02:15:57 PMYou need to be more precise what i should delete where

In the Avidemux program directory, please descend into the "plugins" subdirectory and in the "videoEncoders" subdirectory, remove all DLLs except of a few, e.g. the "null" (ADM_ve_null.dll) and the encoder plugins with "x264" in the filename (also in the "qt5" subdirectory).

The same applies to the "videoFilters" subdirectory of "plugins". Leave just a couple of DLLs there (no matter which, just to reduce the number).

The goal is to identify those plugins which trigger some extensive scanning or such.

You might also try to check whether the issue depends on the availability of a network connection.


After the deleting of the .dll files Avidemux started normal.

Sorry, i dont have more time for this, i'll go back to Windows 10 anyways, i tried Windows 11 22H2 and i'm not a fan of it.


That's a pity that you stop short of identifying the plugins which are related to this slowdown at launch, which might have provided hints at the real cause of the problem. But thanks for confirming that Avidemux with very few plugins starts normally.