Program to join video files

[vim147]

I have some movies on 2 dvds which am using makemkv to extract.

Are there any free programs I can use to merge these 2 files into 1 movie ?

I use handbrake to compress but not sure if I can merge with that as well.

 

[mediachicken]

If they're in a format that Quicktime can open, it looks like you can combine them using that.