Commonly I try options in case of skip the begin of video:
ffmpeg -i -ss 2 input.mkv -ss 4 (then 3 or 5) -codec copy output.mkv
I can split video by segments, then skip first segment and concatenate others in batch
ffmpeg -i INPUT.mkv -f segment -codec copy out%03d.mkv
then remove out001.mkv or more segments and concatenate out* to output.mkv ...
Can I just skip first or more segments in command line?