How to properly cut and join ffmpeg video?

Question

Video

There is a 10 second video.

sharing video

echo Y | ffmpeg -ss 00:00:00 -to 00:00:05 -i original_video.mp4 -c copy cut_0.mp4
echo Y | ffmpeg -ss 00:00:06 -to 00:00:10 -i original_video.mp4 -c copy cut_1.mp4

Merge video

echo Y | ffmpeg -f concat -i join_video_filelist.txt -c copy join_video.mp4

join_video_filelist.txt

file 'cut_0.mp4'
file 'cut_1.mp4'

As a result, on the combined video, "at the junction" of 4 - 5 seconds, the sound disappears. Disappears for a second and then reappears. Why is this happening and how to fix it?
How to properly cut and join ffmpeg video?

Answer 1

on the contrary, the video disappeared for me .. try specifying -ss and -to after -i
or transcoding the audio, specifying copying only for video -c:v copy