joining avi and mpeg files

ffmpegx has joint function, but not sure what kind of requirement it might have for your videos to be connected.

ffmpegx is also a sharware, but u can use for free with very few limitations.

 

This thread helped me out yesterday:
http://forums.macrumors.com/showthread.php?t=251159

Not sure about avi files, but I joined some split wmv files using iMovie. I would definately use this trick to speed up the import process in iMovie. Good luck!

 

You ...

... can use the software called "D-Vision" for joining AVI files and VOB files: http://www.objectifmac.com/ Click on the button called "Tools" for this.

Also, ffmpeg can join any MPEG files: http://homepage.mac.com/major4/ Here, proceed to theTools menu, too.

Both titles are a "Must have" for video coding stuff.