Bash function to concatenate all mp4 video file into a single mp4 file at /tmp/concat

ffconcat.sh

function vidconcat {
    TEMP=$(mktemp /tmp/temporary-file.XXXXXXXX)
    for file in "$@"
    do
        echo "file '$file'" >> $TEMP
    done
    ffmpeg -loglevel error -hide_banner -f concat -safe 0 -i $TEMP -c copy /tmp/concat.mp4
    echo "concat video file is at /tmp/concat.mp4"
    rm -f $TEMP
}

### use like ###
# $ viconcat video1.mp4 video2.mp4 video3.mp4
# concat video file is at /tmp/concat.mp4
# $ ls -l /tmp/concat.mp4
# -rw-r--r--  1 john  wheel  11342633 Jun 22 12:09 /tmp/concat.mp4