Extracting audio from an avi movie?

CD holds 700MB, DVD 4700MB.
Your AVI will fit easy on 1 CD (could fit 9 of them on DVD).
Just burn, like data. File on disk, no worries :^)
Re-sizing AVI is bad plan, lots of time/work, poor results w/ further degradation for the tiniest size change.
You could if you wanted (it's a bad plan) but you COULD make a smaller AVI video-portion, then simply reattach the audio from the original AVI.
This would achieve the great majority of the shrinking.
To further compress the audio would be lots of work and degradation, and save only coupla lousy megabytes...

Don't mess with this audio file; just use it 'as-is'. NanDub will work with it 'as-is' and happily reattach it to another video file if you so desire :^)
L8R

 

The_OGS is right. If you were just removing the last item you needed before you make a clean install, just burn it to a CD-R. I say that because if it's important, then you should make it on something that won't be erased by accident by someone, or you need the CD-RW. Keep the file size as it is.

Anyway, sorry I got somewhat irratible in earlier posts, I didn't know the full extent of what you were doing. Also, I didn't put the instructions for using VDM right, which would have made you confused, I suppose. I said that in Streams>Stream list, to save the MP?, I said "Save As", which should have been "Demux", which is the proper term used there.

Yes, backup the file to a CD-R, at that size, you should have more than enough space, and you should use that space to backup any item that might be worth saving that you didn't have space to put on the site, like your favorites, ect. (just making small talk.

Good luck!

 

Thanks, I hadn't thought about the favorites and such.

 

mordath_1. i had the exact same problem but virtualdub, full processing on audio did the job for me. Thanks for all the usefull info tho guys.

 

hey Rikoshay,

I tried using VirtualDubMod v. 1.5.10.2 to open up an avi file. GSpot tells me its 4CC is wmv3 (windows media codec?) and the audio is ACC (recognized by VDM). now when i 1st open the file i get the same error mordath1 had at the beginning of the post. also one further error on the video:
"couldn't locate decompressor for format "VMV3"(unknown).
VirtualDub requires a Video for Windows(VFW) compatible codec to decompress video. DirectShow codecs, such as those by Windows Media Player, are not suitable. Only 'Direct stream copy' is available for this video"
since i'm trying to extract the audio i dont worry about this. i go to streams to try and extract the acc audio to a wav file in full processing mode but get this error:
"No audio decompressor could be found to decompress the source audio format"
If I can play the avi file in WMP with no problem, shouldn't I have the codec alreadY? i notice the FFDShow audio decoder in the task bar as the video plays.
Any suggestions?

 

Uhhh...I don't think that technique will work with VDM. At a very early version, it was said that anything encoded with Windows Media is not supported by Virtual Dub.

Here's what you can do:

Just go back to VDM, and if you get this error message:



Then just forget it and ask someone for another program to remove the audio. Or you could look for Virtual Dub v1.3c and try to see if you could do something with that.

If not, then just ignore that popup by pushing OK, then just go to Streams>Streamlist>Save WAV to save the audio file (which I think you meant AAC) to .wav.

Tell me if that works.

 

hey Rikoshay,

I don't get the error that you have there, just the errors i mentioned earlier. I am able to extract the audio to wav file without using the full processing mode but it is a very small file, around 23Mb. I'm assuming its still compressed and not an actual wav file. I'm sure of this because i try playing hte wav file in Winamp and i get an error:

"Missing codec, unable to open file"

i tried using BeSweet as suggested in the TMPGEnc forums, but had no luck. I finally was able to extract the audio using AVIMUX-GUI since it supports AAC audio extraction. The output was an .aac file. Now I'm looking for programs to convert from .aac to mp2 or AC3 so i can make my dvd. I've been looking into using GraphEdit. if i have any luck i'll post it here. I've have been asking for a transcoding software to convert aac files to ac3,mp2 or wav in this thread

http://forums.afterdawn.com/thread_view.cfm/1/267438#1510558

please feel free to post

Thanks

 

hey Rikoshay,

I finally got it working...posted it here
http://forums.afterdawn.com/thread_view.cfm/267438

thanks for the help!

 

Well, that's good. I'm glad you were able to fix the problem. I think you could have also used CDex from this site to convert to .wav, then .ac3 (not sure about .ac3). You could really use anything to make a decent .wav file, since Wave is a lossless format, so it doesn't loose quality. The only real difference from .mp2 and .ac3 is mainly AC3 usually supports multi-channel encoding, like 5.1 audio and stuff.

Good luck with the DVDs!