VirtualDub & WMV3

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I have some AVIs with 4CC WMV3, though I can play it normally with media player, still I can’t open it using VirtualDub, I get the error message
“Couldn’t locate decompressor for format `WMV3` (unknown)
VirtualDub requires a videro for Windows (VFW) compatible codec to decompress video. DirectShow codecs, such as those used by Windows Media Player, are not suitable."
Any help where I can find that WMV3 codec please.... reply

12-18-2003 03:51 AM

See steps 8 or 9. If you’ve already got these then those AVIs may not infact be AVIs, they could just have an .AVI extension.

Try opening them in The Faimous One’s Codec Finder:

Note: The Faimous One’s Codec Finder will *only* read *true* AVI files.

WMV3 content is usually encoded to .WMV. If this is the case, then VirtualDub won’t be able to work with it. Alternatively, you *could* try VirtualDubMod, maybe it will give better results. reply

12-18-2003 05:58 PM
615 posts

thanks for your reply but I already found the codec now in microsoft site. I beleive it is a new codec and this is why it is not so popular. The vids are real ACI’s coded using ths code and after installing it, VirtualDub is working fine with it. Anyway, the link for this codec if anyone interested to try is

12-18-2003 08:10 PM

Opps, lol. I forgot to put the links to steps 8 and 9.

For anyone else. Read this:

And scroll down to steps 8 & 9. These steps are virtually the same as Alex posted. The steps also detail which version of the codec package to install for your given version of Windows Media Player.

While you can put WMV9-WMV3 stuff in an .AVI container, it’s actually natively supported in a .WMV container.

WMV3 itself is just an updated version of Microsoft’s MPEG4 codec variant and so this is why the codecs on the system need to be updated. Last time I used WMV3 (FourCC for Windows Media Video 9 encoded stuff) was about 3 or 4 months ago. Did a bit of encoding too.

Incidently, you can also encode to WMV9 using TMPGEnc.

What are you doing with the WMV3 files, Alex? Are you re-encoding them or something else? reply

12-18-2003 09:58 PM
615 posts

Actually I’m joining them together, I got some movies that is splited in parts and I would like to join it together in 1 big file. When I tried to join it using Easy video joiner and similar programs it cause some problems like no sound in some parts of the movie so I had to re-encode them using VirtualDub which was the only solution for me to join it correcty !:)
The point is that I read step 8 and 9 which you mentioned and followed it but it didn’t help, I guess it these codecs are usefull to view the movies but not for re-encoding it.. what do you think ?

12-19-2003 05:07 AM

hey I have seen ur posts but it still doesn’t rly help me. Ive got a 2cd and i want to make 1 big file of it but it keeps giving me the same error.. I have an Winamp media file ( WMF) Do you have any idea what to do? any program you advice me? reply

08-26-2004 09:16 AM

I need help please, i’m using virtualDub, to encode movies, but i’m facing a problem which is whenever i open a certain file, it give me a message: “VirtualDub has detected an impror VBR audio encoding in the source AVI file and will rewrite the audio header with standered CBR values during processor for better compatibility." so can you help me solve this problem, cause there is a delay of sound if i accepted the message ?:(

11-04-2004 02:43 PM

ok....i’ve read wat u guys wrote about wmv3 codec and all...but i already went and downloaded the windows media 9 package and it really didn’t work. I’m trying to play this cd in divx and it keeps saying that i need to download FOURCC: WMV3...i looked for it everywhere...i’m the fact that my player is super slow... reply

01-16-2005 06:47 AM

The link Alex gave works. You can open wmv3 files with virtualdubs without any errors. I am providing the VCM Codec link again. By the time, thx for the link Alex. reply

01-30-2005 10:02 AM
felix nukem worked... reply

01-30-2005 09:51 PM

thanks ur codex u give us , the wmve works great
thank u reply

02-18-2005 01:09 PM

Thanks a lot for the download address Alex reply

03-20-2005 09:40 AM

thank you so much...I quite often download .avi files that are wmv3, and wanted to take screenshots or make clips from them using virtual dub (as well as ffdshows screen cap function, but haven’t been able to..but i dled from the link you posted and now it works great XD reply

04-20-2005 03:57 PM

Now I can see the video, but I can’t convert it to xvid... Does anybody know why?
(I’m using VirtualDubMod) reply

05-09-2005 01:47 AM

Ok I am using VirtualDub and when I open my video file i get “Couldn’t locate decompressor for formater DX 50 {unknown}
VirtualDub requires a Video for Windows compatible codec in order to decompress”. Help? reply

07-28-2005 02:35 PM

I guess I should also say, I am only trying to change the framrate on a video, nothing more, I need to tone it down from 119 fps to 23. reply

07-28-2005 03:10 PM

thank it work’s great reply

08-11-2005 06:31 AM

(to Strider)
This is off-topic for this thread (it deals with WMV3 and your post deals with DX50). Anyway here’s steps for your problem.
1. Get the divx play bundle from (DX50 is the fourcc for DivX 5)
2. Open your file in VirtualDub, click video, pick 'Direct Stream Copy'. (Very important)
3. Click Audio, pick no audio (if the video frame rate is slower, the audio length won’t match)
4. Click video, frame rate. Click on the second box 'change frame rate to ___ frames per second' and type in the number you want.
5. Click file, save as avi. Type in a name and you’re done. reply

08-12-2005 03:16 PM
1,580 posts


My problem is I can’t watch wmv3 files which I downloaded via emule...I have vlc player with wmv3codec but the result is sound and a weird mix of dark colors...when I tried to watc them on wmp10, the program says that you have to take a licence to watch this videos...then starts to get licence and but when it finished a window appears and says that your licence is expired you have to buy newone...the site is Ican’t understand..... can anybody help me.................. reply

08-20-2005 05:43 AM

Hi all,
I have this problem with emule too!!!Please help reply

09-24-2005 02:05 PM

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