what software do you recommend to extract the audio part of a video MPEG-4 file so I can listen it on my Iphone?

The software that comes to my mind to extract the audio track of an MPEG-4 file is Quicktime Player 7. Open the file with QP7 and choose File>Export and then choose Audio to Aiff, Wave, or AU from the popup menu next to Export. Quicktime player (the default in Snow Leopard) doesn't have this feature, but if you installed the Quicktime Player 7 (that's an option when installing Snow Leopard and will then be in your utilities folder), you should be able to do this. I don't know if this is a feature solely in Quicktime Player 7 Pro or not; I think not, but not sure.

Another app worth looking at is Amadeus Pro. If you open the MPEG-4 file win Amadeus, it will open the audio track and you can then save it out in any audio format you like. Amadeus Pro has many other audio editing features as well.

A third (open source) app is Audacity. It has many of the same features as Amadeus Pro, but I find it less stable. Still, it will open an MPEG-4 file and save out the audio portion as an mp3.

Many thanks!

I second the Amadeus Pro recommendation. I've used it myself for years for these types of audio conversions. However, I assumed you were looking for a free solution. I wasn't sure about Audacity since I've never used it.


Bob C.