GNU/Linux Desktop Survival Guide by Graham Williams
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Video PNG Stills

20200924 We can extract a particular section of a video using avisplit and convert that to a sequence of png files (screenshots) using mplayer: This generates about 100 png files.

$ avisplit -i a.avi -t 0:9:14.0-0:9:16.0
$ mplayer -vo png a.avi-0000

An alternative is to use the Take Screenshot option under Edit in totem.