Concatenate two mp4 videos into one file

Question

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How can I merge or concatenate two or more MP4 files creating another MP4 file?

I recently ripped my DVD collection to play them on my media center PC, and several of them are two-disc movies (i.e. The Lord of the Rings). Since I ripped each DVD individually, that gives me two video files for some movies.

I am using Ubuntu Linux - how can I concatenate these two MP4/H.264 videos into a single MP4 video file? Preferably from the command line, and without re-encoding everything during the process (although I can try figuring out a video editor like Pitivi if that's the only solution.)

Answer 1

There are two ways you can do this.

1. Using Mencoder

mencoder file1.mp4 file2.mp4 -ovc copy -oac copy -of lavf format=mp4 -o output.mp4

2. MP4Box

MP4Box -add file1.mp4 -cat file2.mp4 output.mp4 

Note the use of '-add' for the first file and '-cat' for second file; if you mistakenly use '-add' for the second file - you will lose the first file's content.

Answer 2

Hunt down or build mp4box for your system. It's cli. I don't know of any linux guis for it, but I'm sure some exist.

Install MP4Box

sudo apt install gpac