how to combine mp4

I have a directory of mp4 i would like to combine into a single mp4. what is the easiest way to do that. I duel boot so it can be a windows solution or snow leopard.

iMovie?

i couldnt figure imovie out. all the things i could see had to do with adding your own stuff like special intros and stuff. I didnt want to deal with that. after some searching i figured out i needed to look for a joiner program. there is many i tried 4 or 5 of them and some worked others didnt. the best one that worked 100% was a windows program called Free Video Joiner. it does it properly by decoding each one first and then it encodes to the format you choose. the others mostly just tried to jam the files together and often failed. bootcamp saves the day again.

Open iMovie. Import your mp4s. Create New Project. Drag mp4s from Events to New Project. Share/Export as required. No need for "adding your own stuff like special intros and stuff".

If I recall correctly I have done this using MPEG Streamclip. Early versions had a join command. The current version doesn't seem to have that but here's the solution if I remember correctly:

1, Move target files into a folder and get them into the order you want them. I temporarily renamed some so they would appear on the right order in Streamclip's open file list

2. Launch Streamclip and choose to open files.

3. Select all files in the list and they should open in sequence.

The files should open in sequence in one file. Chosse Save As or one of the export options to save the files.