I would like to convert avi or iso farmat to MP4 formt would anyone know what is the best and easy solfware to do it. Please help. Thanks:mad:

Need more info, what exactly are you trying to do? Besides the conversion

Basically an ISo is an image of a pgrogram that can be burned to a cd, or you have the option of extracting the iso to a folder on your PC to be able to work with the files that are inside of the iso.

Here is a brief descriptin of an iso file
What is an ISO image? - Knowledge Base

You can always find information on iso by going to Google and typing "what is an iso"

Now an AVI file is a video file, such as a movie or a concert. Are you trying to get just the music or sound from the AVI?