Merge several video files into one without compression?

Question

Video

Hi all. fotik shoots video for 30 minutes maximum. how to merge 2-3 mp4 (FullHD) video files into one without transcoding and so on??

Answer 1

ffmpeg -f concat -i list.txt -c copy output
Where in list.txt are lines like
file 'VIDEO1.mp4'
file 'VIDEO2.mp4
'
Etc.

Answer 2

tell me what is the problem?