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Old 26th August 2013, 15:40   #1  |  Link
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Avisynth and Windows 8


I'm working on Windows 8 and just installed Avisynth, ffdshow, and matroska splitter. This configuration just worked fine in Windows 7 but it seems there's a problem with file extension register in Windows 8.

AvsP editor shows the .avs file in the right way into its built-in video preview window, but the system fails to run .avs files in players or editors such VLC, Windows Media Player or VirtualDub. The errors are about extension not recognized or AVI import filter error (80040154 error in VirtualDub).

I guess there's a change in Windows 8 file extension association because users of 7z or Xnview are having problems to make these proggies to redirect file extension to them.

I hope there's a workaround to fix this. Thanks a lot for your help in advance.

Last edited by daniforever; 26th August 2013 at 16:59.
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Old 29th August 2013, 11:51   #2  |  Link
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Right click - Open with - Choose default program. Works fine for me.
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Old 29th August 2013, 12:30   #3  |  Link
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M Keeper, thanks for your reply.

If I follow your steps and I associate using "open with" .avs extension to VirtualDub or MediaPlayer I keep receiving same errors. It seems Windows 8 is not able to associate .avs with AviSynth .DLLs...

I show you some screen captures. First shows a perfect preview inside AvsP (I guess AvsP negotiates directily with AviSynth dlls). Media Player and VirtualDub looks like not able to start AviSynth resource because Windows 8 doesn't allow a good AviSynth dlls/Registry setup.

I hope someone could help...

AvsP nicely working

Media Player error

Media Player error

VirtualDub error

Last edited by daniforever; 29th August 2013 at 14:04.
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Old 29th August 2013, 17:51   #4  |  Link
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Tried Media Player Classic Homecinema?
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Old 29th August 2013, 19:55   #5  |  Link
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MPC-HC can play .avs files

Its also simple, and IS Windows Media Player (or was years ago) but has been updated and much much simpler than Windows Media Player as it plays files and thats it without the bells and whistles the latest releases try to offer in a one software does all

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Old 31st August 2013, 01:59   #6  |  Link
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Maybe it's something like this?

It was neccessary for me for Avisynth x64 on Windows7 x64; it's not the same environment, but maybe Win8's tightened UAC caused the registry key not to be written.

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Old 3rd September 2013, 10:23   #7  |  Link
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I think Avery Lee of VirtualDub was talking about this in his blog.
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Old 1st October 2013, 14:03   #8  |  Link
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I want to thank you all for your hints. Finally I realized I was mixing 32 and 64 bits versions. Everything is fine working in Windows 8 64 bits now using these 32 bits versións:

Avisynth 2.5.8 (32 bits)
ffdshow_rev4500_20130106 Official Build (32 bits)
Matroska Splitter (32 bits)

M$ Windows Media Player keeps reporting .AVS is not a recognizable extension but if works after asked to try to play it. Media Player Classic and VirtualDub 32 bits works nicely.

I'm sorry not to see all this mess before. Thank you all!.
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