How to join 2 audio tracks inside a XVID avi video (on MAC)?

[sharkattack]

Hi I'm new here and this is my first post,

How do I join 2 audio tracks (both MP3) inside an XVID avi video, one that starts at 0:00:00.00 and ends at 2:07:40.70 with another that starts at 2:07:40.70 and ends at 4:15:33.45, into 1 single audio track that starts from 0:00:00 and ends at 4:15:33.45?

I got this after I did the copy and pasting 2 XVID video in Quicktime 7 Pro.

Thanks for any help.

[live4ever]

You should join the two avi files together. I like D-Vision's tools but I think ffmpegX also has an avi joiner (haven't tried it though).

http://www.objectifmac.com/dvision.php

[sharkattack]

^ I've joined the 2 XVID avi videos already using the copy and paste method in Quicktime. Please read the original post.

It's the two MP3 audio tracks that I'm have problem with. Any MAC tools/softwares that can help me join the tracks together would be best.

And no, ffmpegX does not have the tool that I need for joining those two tracks.