When I runfor i in $(ls *mp4);    do ffmpeg -i $i -ss 0 -t 720.0 -vcodec copy -acodec copy $i-part1.mp4;    ffmpeg -i $i -ss 720.0 -vcodec copy -acodec copy $i-part2.mp4;done;in a directory of some mp4-files I get a ~3 second black screen with audio at the beginning of the part2 clips, how can I fix this? Am I missing something in my script?
Black screen when splitting media files
ffmpeg;media