Input video, output audio?

[Jmmsbnd007]

This sounds like a real noob question (well, I guess it is...)... I need some way to script (with avisynth, or any other program) a sequence that opens a video file and saves the audio as a seperate .WAV file (better yet, encode them to MP3, but I can do that with LAME I suppose). I have a couple hundred little clips that I recorded merely for the audio, and doing this by hand would be ridiculous. Please help, thank you.

[Guest]

What kind of "video file" are you talking about?

[Jmmsbnd007]

Just a standard .avi compressed with a lossless codec with stereo uncompressed WAV sound.

[mg262]

If you wanted to do it with AVISynth, you would create a batch file that took a file name and

1. Created a one line AVISynth script file, consisting only of AVIsource
2. Called something like this on the script file just created: http://webjory.tripod.com/avisynth/avs2wav.htm

You could then use the for command in the interpreter to invoke that batch file once for each file that you have. (See http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ntcmds_shelloverview.mspx )

For the batch file and AVISynth are rather redundant in this case... if you can find a command-line-supporting program that takes one AVI and extracts the audio from it, you can call it directly using the for command. (Unfortunately, I don't know of something like this.)

Edit: http://agrgic.tripod.com/avi2wav/

[sh0dan]

Have a look here:

http://66.249.93.104/search?q=cache:OKTg6c8RlrkJ:www.avisynth.org/BatchScripting+site:avisynth.org+avisynth+batch&hl=da&client=firefox-a

(avisynth.org is down, so you are getting a google cache)

For the AVS Script field, use:
AviSource("%filename.avi")

For the Batch File, use something like:
Avs2Wav "%filename.avs" "%filename.wav"

For the Dir Listing, use something like this:
file1
file2
file3
....insert all your files
- with NO extensions.

Press Generate, and you'll be able to download a zip file containing all your AVS files, and a batch file.

Avs2WAV here: http://www.blainehelmick.com/AVS2DVD/

[mg262]

If you're going with sh0dan's method, you might find it useful to open up the command prompt, go in to the directory with all your files and type

dir *.avi /b > directory.txt

(alternatively from the start menu select run and then type

dir c:\mydirectory\mysubdirectory\*.avi /b > c:\mydirectory\mysubdirectory\directory.txt

changing the directory as appropriate)

Now you can open up the file directory.txt in any text editor and it will have a list of all your video files. You can then use the search and replace to remove the extensions.

[Firesurfer]

I'm sorry to break this conversation on AviSynth, but isn't the right tool for Jmmsbnd007 something like BesweetGUI in batchmode? It handles avi conveniently and produces high quality mp3s. This would then be the wrong forum of course.

Besweet Homepage (http://dspguru.doom9.net/)

Download Besweet, BesweetGUI and the VobInput plugin for avi support.

Use wizard mode in GUI and enable batch-mode. Drag all your files to the GUI-window, make your settings and go.

for more info you should read the Audio Encoding (http://forum.doom9.org/forumdisplay.php?f=11) forum, especially the BeSweet-FAQ.

[Jmmsbnd007]

AVI2WAV worked out for me... thanks guys.