Combining MP4 Files

I want to programatically combine MP4 files. I have seen many options for combining files using a gui but that will not work for my application. Does anyone know of an SDK or something that i can tie into (preferably from within .NET) and access some functionality that will allow me to combine multiple MP4 files into one file?
Thanks!

Steve Grisetti covers this well in his Basic Training Series on Muvipix.com.
First, you will want to start with a New Project, that matches this source footage 100%.
Import the MP4's (for VHS tapes, a better format would have been DV-AVI Type II)
Drag the two files to the Timeline, in the order that you want them
As you play the Clips in the Timeline View Mode, you can use either the Scissors/Razor Tool, or Ctrl+K to Cut the areas, that you wish to remove
Rt-click on the areas to be deleted, and choose "Delete and Close Gap"
If desired, you can add Transitions
Add any music, etc., using PCM/WAV 48KHz 16-bit (not MP3)
Export/Share to the format desired for delivery
Good luck, and happy editing,
Hunt

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