ffmpeg -i input.mp4 -filter_complex "[0:v]trim=duration=5[av];[0:a]atrim=duration=5[aa];
[0:v]trim=start=5:end=10,setpts=PTS-STARTPTS[bv]; [0:a]atrim=start=05:end=10,asetpts=PTS-STARTPTS[ba];
[av][bv]concat[cv];[aa][ba]concat=v=0:a=1[ca];
[0:v]trim=start=10:end=15,setpts=PTS-STARTPTS[dv];
[0:a]atrim=start=10:end=15,asetpts=PTS-STARTPTS[da];
[cv][dv]concat[outv];[ca][da]concat=v=0:a=1[outa]" -map [outv] -map [outa] output.mp4

ffmpeg -i input.mp4 -ss 00 -t 10 -vcodec libx264 -acodec libfdk_aac -f mpegts segment0.ts

printf "file '%s'n" ./*.ts > mylist.txt

ffmpeg -f concat -i mylist.txt -vcodec copy -bsf:a aac_adtstoasc output.mp4