VirtualDub - No audio decompressor could be found.

[kelemvor]

Hiyas,

I have an AVI file that the audio is way too quiet on. Only way I know I can make it louder is through VirtualDub. Problem is once I set it to Full processing mode for the audio, I get an error when I try to play back the preview.

No audio compressor could be found to decompress the source audio format
source format tag: 2000

I already have the AC3 filter program installed as well as Divx if either of those might help.

Gspot says:
0x2000 (Dolby AC3) AC3
48000Hz 448 kb/s tot , 6 chnls (3/2 .1)
Codec(s) Installed


Any idea on what could be wrong?

[Soopafresh]

http://fcchandler.home.comcast.net/~fcchandler/AC3ACM/

or

Avi_Gain_Soopa_Loud.bat from this thread

https://forum.videohelp.com/topic314909.html

[Laddydaddy]

Try installing the AC3 ACM Decompressor. That should help.

[szalaikornel]

I had some problems but after I had installed the newest K-Lite codec pack i had no problems

[kelemvor]

I tried the ac3 acm thing above but that didn't seem to help. SO I used the Soopa Loud file and that seemed to work just fine.

Thanks.

[NotHereNow]

I've just found a solution of this problem with the help of this thread:
http://forum.digital-digest.com/showthread.php?t=8591
and a couple of experiments.

If you get messages like "no audio compressor could be found. source format tag: xxxx" from VirtualDub, you should manually add the following line to your windows\system.ini file under [drivers32] section:
msacm.xxxx=ac3acm.acm
(in my case xxxx=2000 too, but i've heard something about 0050 or 0x50)
may be it's possible to use something else instead of ac3acm.acm

Very simple!

[DarrellS]

Virtualdub doesn't deal with 6 channel AC3 very well. It works best if you open the audio as a seperate file > Audio > Audio from other file. You'll need the AC3 input plugin.

http://fcchandler.home.comcast.net/Plugins/AC3/AC3.zip

Edit: Soopafresh way is a better solution though if no encoding is necessary.

[B-Art]

Try installing the AC3 ACM Decompressor. That should help.

This is the one!.
Just right-click on the inf file and select install (I use Windows 7).

I also used the AC3.zip previously mentioned.
Place the AC3.vdplugin in the plugin folder under VirtualDub.

Restart VirtualDub and it works

[razzell2]

Try installing the AC3 ACM Decompressor. That should help.

This is the one!.
Just right-click on the inf file and select install (I use Windows 7).

I also used the AC3.zip previously mentioned.
Place the AC3.vdplugin in the plugin folder under VirtualDub.

Restart VirtualDub and it works

Bam! That was it. Installed the AC3 ACM codec, and now my virtualdub adds the audio as well as the video.
I just happened upon this forum thread, searching for an answer to my virtualdub audio error as mentioned at the beginning of the thread, and I found the answer here.
I'm a newb here, don't know names, so I will just thank you all with this post.

[Budman1]

You might run into the same problem with AAC audio as well and there is an AACACM codec available also at http://home.comcast.net/~fcchandler/AACACM/index.html. Just in case anyone happens to need it as I did for Virtualdub
conversion.
Thanks
Budman1

[razzell2]

I have a very "newb" question.

Can you mess up anything in your computer, any current audio connections or sounds, by downloading multiple audio codecs?



Thanks for replying

[Budman1]

razell2
Generally codecs only change how sounds encoded in audio or audio/video files such as an AVI, mp4, mp2, mp3, flv, etc are decoded. These videos or audios such as songs are compressed to save space as files and shorten downloads and upload times over networks. They then need DEcompressed, hence the name COmpressorDECompressor. They may, and probably will, alter which ones are used for certain audio so some songs MAY not play any longer that used to be ok.

On the other hand, I HAVE had programs such as converters, muxers, editors and other programs that come with their own codecs mess up my sound. It's not the codecs so much as the fact they can alter certain computer settings to make the most use of their function. This doesn't happen too often but, with the dozens of programs and utilities I've installed, it has happened mabybe 4-5 times. The latest was after installing a Creative sound card firmware update, I no longer had sound from my speakers with headset plugged in. That is just a setting that I could change, but the fact is it DID change my audio setting.

The biggest thing codec do is fill up your computer with multiple codecs used for the same format organized in a certain order. Since your computer usually uses the one with the highest 'Merit', the others are just cluttering you computer UNTIL you deinstall some, in which case they become higher and are used again.

Codec packs in general are known to be bothersome because there are so many, good and bad, so be sure you download ones you have researched and checked reviews for. I have my favorite that is updated regularly and has not failed me. It's the only one I install to keep the quantity at a minimum.

Thanks
Budman1

[razzell2]

razell2


The biggest thing codec do is fill up your computer with multiple codecs used for the same format organized in a certain order. Since your computer usually uses the one with the highest 'Merit', the others are just cluttering you computer UNTIL you deinstall some, in which case they become higher and are used again.

Codec packs in general are known to be bothersome because there are so many, good and bad, so be sure you download ones you have researched and checked reviews for. I have my favorite that is updated regularly and has not failed me. It's the only one I install to keep the quantity at a minimum.

Thanks
Budman1

Thank you Budman1, for replying to my question.
I appreciate your explanation on the installation of audio codec's and how they are used.

I ask because, after installing a particular codec for Virtualdub, (one of the codec's recommended here in this forum... Xvid Video Decoder), every time I play an .avi an icon pops up in my taskbar, a big blue X, and I assume that my audio is now using that codec to decompress my audio, or play my audio.

I am not having any problems with any of my sounds, my audio, my music, etc, but it would appear that whatever codec I was using before has been supplanted by the Xvid codec. I'm not sure if that's a good thing, or a bad thing

I had previously, long ago, downloaded an ac3 filter codec and, also long ago, the L-Lite pack. So I am not sure which audio codec my computer was using, but I see that it is now using the Xvid decoder.

So, I was just curious

(If I uninstall the Xvid codec, my virutual dub probably wont work. I cant find any settings in the Xvid decoder pack that would let me disable it, or any way to pick and choose codec's. If that is even possible, or needed. I should leave it alone, do you think, Budman1?)

Again, thank you m8

Actually, now that I look at it, this would appear to be the Video codec in the Xvid pack that is being used.
I just double clicked on that big blue X in my taskbar and it opened an Xvid MPEG 4 Video Codec settings box. LOL
Perhaps the Xvid decoder is being used for both audio and video. Wow. I am really confused now.

By the way, I run Windows Vista. Just thought I would mention that

[Budman1]

Razzell2
That Blue X sounds like the Xvid MPEG-4 Video Codec icon and it shows whenever you need that codec to decode the video format used in the video (most likely MP4 Xvid). It shouldn't show for other formats such as AVC type videos. You also said you had downloaded 'L-LITE"? I'm not familiar with that one but I assume you meant K-lite. If that is the case I understand since I also use K-Lite and XVID for Virtualdub because it gives me the capability to encode in Xvid format in Virtualdub.

This is another problem with codecs. You probably installed Xvid codec AFTER K-lite and it installed it with a higher "Merit" than the one K-Lite uses to decompress Xvid formats. If you had installed K-Lite last, it would have said it had a newer version and asked if it should remove your old one (I usually say no). You can adjust what is used for what but unless you really wish to, and if everything is working, I'd just leave it as is. K-Lite has a built in codec tweak tool and It's not too hard if you understand the process but can be difficult otherwise.

BTW what level XVID did you install?
Thanks
Budman1

[razzell2]

Yes, I'm sorry, I mis-typed. The K-lite pack is the one I installed some time ago. And yes, the blue X is for the Xvid MPEG 4 decoder, that I downloaded and installed from a link here...I think right here in this thread?
It only seems to be used when I watch an xvid .avi movie I have downloaded. I am not even sure if it is the one being used for my Virtualdub, lol.
By "level" do you mean version #? It is the Xvid 1.3.2. From Xvid.org.
I am almost certain that I followed a suggestion in this forum thread to get that... I think
I also grabbed the AC3 ACM codec. To be perfectly honest, I am not even sure that I need this Xvid codec. But all of these codec downloads were to get my Virutaldub to load the movie, and then load the sound as well.

I think you are right. Everything is working fine...my .avi movies are playing as they always did, only now they seem to be using the Xvid codec to decompress the video. I guess I could uninstall the Xvid codecs and see if everything still works? Including Virtualdub. And if I lose my video or audio in VD I could just reinstall them.

There was another option mentioned here for VD, and I think that was called the ffcshow codec? Perhaps I should have grabbed that one. LOL

[Budman1]

Razzell2
Yes, almost the same setup I have. Virtualdub uses VFW filters and the later K-Lites only contain VFW filters if you install the Mega pack. Thats a lot of filters if you do not need. I mention this for the below explaination because if you do not show an entry under your ffdshow program for VFW decoders then VFW filters were not part of the codec pack installed.

K-Lite comes with a codec for XVID decompression included in FFDShow. Before you uninstall XVID, go to Programs )(x86 if windows 7)-->k-lite configuration-->FFDshow--> VFW Interface codecs, these are the ones used by Virtualdub. In the list there should be XVID and drop down with choices of disable, Libavcode, and XVID(since you have it installed). This is where you tell which codec Virtualdub will use to decode XVID videos. It really makes no difference which you choose if our instance since we have XVID installed and it will take care of it if you disable it also. However, If you select the video tab at top of Virtualdub and choose compression, you should see XVID as one of the choices you can compress in. That is what will most likely go away if you uninstall XVID codec separately meaning you can no longer compress in XVID format thru Virtualdub alone.

With the latest Virtualdub, it is very easy to use AVISynth to load a video into Virtualdub using the existing Windows 7 Directshowfilters but you would still need the XVID codec to compress in that format.

Thnaks
Budman1

[razzell2]

Budman...

Well, I never did install the ffdshow codecs. So I don't have to worry about where those are located or whether or not they have any effect on my codec situation.
Other than that, the codecs I did install.... the AC3 ACM Decompressor and then the Xvid Video Decompressor, have allowed my Virutaldub to operate smoothly and correctly, as I have already used it to crop two .avi's together, and to edit out some superfluous video in a movie I downloaded from the web.
And, as I mentioned, everything else works properly, nothing has been changed or stopped as a result of those downloads.
So, unless and until something stops working or I lose audio or the ability to watch my .avi's and/or my xvid's and video's, I think I will just leave it be and let everything remain the same

I am grateful to this forum for providing me with the information and the links to get the necessary audio and video codecs to make Virutaldub work correctly, and I thank you personally for taking the time to help, and instruct, and inform me about codecs and decompression, and some other information I did not know about these things

Thanks Budman1, and thanks Videohelp. Much appreciated

Razz

[Taurenlord]

I'm trying to edit my mp4, and it comes up with the audio decompressor error, although I installed ffdshow, AC3, AC3ACM, everything I can find. And I think it may be making it worst. Still same error. :/ It works perfectly if I remove audio. But kind of need it.

[Baldrick]

Edit: Or wait...I doubt your mp4 has ac3 audio. What is the audio the in mp4? Identify with mediainfo if you don't know.

[Taurenlord]

I have ffdshow installed, with the AAC codec enabled. So :/

[Budman1]

The easiest way to get MP4 with AVC Video and AAC Audio to play in VirtualDub is go to http://codecpack.co/download/FFInputDriver.html and download the FFinputDriver.vdplugin filter. The download link (32 bit) is near bottom of page:


Unzip contents and place the contents in the Plugins32 folder of Virtualdub:


You probably don't need the .svn folder but it came with the zipped files so I put it in anyway. I did a test with those as the only files in my VirtualDub Plugins32 folder to be sure those are the ones needed and MP4's plays fine. Be sure to set your Audio and Video compression formats when you save as AVI since this plugin decompresses to RGB video and PCM (Raw) audio. If you don't, your video will be very large.

[El Heggunte]

ffdshow does not decompress audio in VirtualDub, because VirtualDub uses the ACM API.

Get the latest AAC ACM from http://gral.y0.pl/~fcchandler/

Hope this helps.

[Taurenlord]

Absolutely Nothing is working. MPEG-2 Virtual Dub audio doesn't work with MPEG-2. Gives me the audio decompressor BS... Already have LAME, AC3, AAC Codecs installed... not sure what else :/

[Taurenlord]

ffdshow does not decompress audio in VirtualDub, because VirtualDub uses the ACM API.

Get the latest AAC ACM from http://gral.y0.pl/~fcchandler/

Hope this helps.

I swore I download AAC ACM, but I guess they all look the same to me after trying to figure this out for several hours. :/

Anyways, thanks man! Btw, does AAC ACM work for MPEG-2? Cause I was having the saving problem with MPEG-2s...

Yea, trying to edit mpg isn't work for the audio

[El Heggunte]

Absolutely Nothing is working. MPEG-2 Virtual Dub audio doesn't work with MPEG-2. Gives me the audio decompressor BS... Already have LAME, AC3, AAC Codecs installed... not sure what else :/

Do you mean VirtualDub MPEG-2

If the answer is "yes", then drop it, and start using "the real thing" (together will ``all the other´´ input plugins).

If the answer is "no", then I don't know what to suggest.

P.S.: The MPEG-2 plugin should work with .MPG and .M2V files. Transport Streams are a different beast, and if I were you, I'd rather remux them to MKV before trying to do anything else.

[Taurenlord]

I tried both. Weird that it isn't working, I think some codec isn't registering right. I might have to kill my entire computer one day and start fresh.

MPEG264 and MPEG plugins right? For regular VirtualDub and VirtualDub64? So weird :/ it's not working...