help to reduce avi file audio bitrate

[whateverer]

Hi,
I have to write 13 video files and some of them have audio bit rate of 135, some 123 and the rest 128 kbps.
Overall, the files size up to a total just 50 mb more than a DVD capacity.
So I think changing the audio bit rate to a uniform 128 kbps for all the files should do the trick.

Please, can someone help me step by step on how to change the audio bit rate of the files?

I want to keep the existing video bit rate of the files intact.
I searched around and found something about the program VirtualDub, but it was very old, and the instructions were not clear to me.
Aren't there programs which allow it to be done in easier steps?

thank you and help me regarding this, please

[paglamon]

Try AVIDemux.
Load your video into the program. Under Video select "copy". Under Audio select MP3(lame) and Configure it to 128 kbps. bitrate. Then save the new avi.

[whateverer]

Try AVIDemux.
Load your video into the program. Under Video select "copy". Under Audio select MP3(lame) and Configure it to 128 kbps. bitrate. Then save the new avi.

Hey, thank you so much; it worked. I am grateful to you, man.

[paglamon]

Glad to have been of help.