Extract video section

ffmpeg -i input.MP4 -ss 0030 -to 0042 -c copy output.mp4

Meaning

• -i: select input file
• -ss: start second
• -to: end second
• -c copy copy all streams as original (audio, video, subs)
• end with file name of final file

Remove audio from clip

ffmpeg -i input.mp4 -an -c copy output.mp4

Meaning

• -i: select input file
• -an: remove audio stream
• -c copy: copy every other stream as original
• end with file name of final file

Concat two clips

Create concat.txt file with input files

file 'input-1.mp4'
file 'input-2.mp4'

and then run

ffmpeg -f concat -i concat.txt -c copy output.mp4

Meaning

• -f concat: use concat ffmpeg function
• -i: select input file
• -c copy copy all streams as original (audio, video, subs)
• end with file name of final file