I would like to suggest for a change to make it possible to select which streams you want to extract from the AVI files.
Currently your tool when right clicking allows it to extract everything. Which is all good.
However, in most cases(at least for me?) you only want to extract the non-default Streams, as the default one is decoded when using the file anyway.
And when you have recorded large file, it takes forever to extract, and to just extract an extra stream is a big waste of time.
Also, this makes me remember the other thing.
To be able to select where to extract, as currently it will extract in the same place as the AVI file, and that takes a huge time compared to extracting to another HDD.
Both of this should be fairly easy in my mind, but as it's not the "Mainstream" in your application, i can clearly understand that you don't take any priority to this.
But hope you take it into account that this is a simple thing that can decrease time spent waiting:)
//Many Thanks
http://www.letsplayforum.de/index.php?page=Thread&threadID=110277
This tool does all what you want. You can export audio with it and you can create your avisynth script with it (if you use avisynth).
The AudioStreamSplitter has this command
"C:\Program Files (x86)\Dxtory Software\Dxtory2.0\AudioStreamSplitter.exe" "%1" HKEY_CLASSES_ROOT\SystemFileAssociations\.avi\Shell\AudioStreamSplitter\command
Maybe you can set an other parameter here?