Join multiple GoPro MP4 files to single one
GoPro 'chapters' are footage around 4 GB - The camera starts a new file every ~ 10 minutes.
If you have media files with exactly the same codec and codec parameters you can concatenate them quite easily.
Fastest way, that I found, is use ffmpeg with concating function,
but there is one unnecessary step with mylist.txt, the list of all files, you want to have concatenated.
for f in *.MP4; do echo "file '$PWD/$f'"; done > mylist.txt
If your shell supports process substitution (like Bash and Zsh), you can avoid explicitly creating a list file and do the whole thing in a single line:
ffmpeg -f concat -safe 0 -i <(for f in *.MP4; do echo "file '$PWD/$f'"; done) -c copy output.mp4
Here is also nice bash function, that can be put to your .bash_profile:
function video-concat() {
ffmpeg -f concat -safe 0 -i <(for f in ${@:1:${#}-1}; do echo "file '$PWD/$f'"; done) -c copy $_
}
Then you can call video-concat function as follow:
video-concat *.MP4 output.mp3