Are you looking for a program that can combine 2 video files into a 1 video file format? GensanBlog.com recommend AviDemux develop by Mean, it is free video editor program that are easy to use and allow the user to combine video files with the same quality and no quality loss in the video conversion. AviDemux is available in Linux, BSD, Mac OS X, Windows XP, Windows Vista and Windows 7.
You can download the program for free at their official website (http://avidemux.sourceforge.net/).
How to Combine 2 or more Video Format
Step 1. Open AviDemux.
Step 2. Click File > Open > Select your first Video File.
Step 3. Click File > Open Append > Select your second video file. (Repeat step 3 to add more video)
Step 4. Click File > Save > Save Video > Type your filename (ex. “Test.avi”)
Unfortunately, Combining subtitle files (.sub) is not yet possible on AviDemux..