I want to split a 50 seconds video from the camera and save second 10 till 40. I use the following ffmpeg command:
ffmpeg -i test1.h264 -acodec copy -vcodec copy -ss 00:00:10 -t 00:00:30 splittedvid.mp4
I get more than 2 seconds of black frames in the beginning, which is weird. When I use -ss 00:00:00 everything works just fine.