How to splice sections of a video with avconv?

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http://unix.stackexchange.com – I have figured out so far that you can cut a section from a video with avconv with a command like this (cuts from 1:00-3:00): avconv -ss 00:01:00 -i "input.avi" -t 00:02:00 -c:v libx264 -crf 23 "output.mp4" But how would I cut two (or more) sections from the video and combine them into one video? For example, taking 1:00-3:00 as above, plus 8:00-10:00, making a final 4 minute video. I guess I can do them separately then concatenate them, but is there a simpler way? (HowTos)