Concatenate videos

Concating several video files with ffmpeg is very straightforward if they all share the same container and codec. Add all input files to a text file listing their relative or absolute paths.

file 'file1.mp4'
file 'file2.mp4'
...

Run the following.

$ ffmpeg -f concat -safe 0 -i input.txt -c copy output.mp4

-safe 0 can be omitted if the filepaths are relative.