NOTE: times given by the 2nd -ss option and the -to option are relative to the time given by the first -ss option. So this outputs a 3 min 10 sec long clip (5:10 - 2:00). ffmpeg seeks fast to the 1 min mark (the first -ss 00:01:00), then starts looking for key frames, and outputs a clip from 3 mins into the clip (given by the second -ss option) to 6 mins
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