The starting and ending timestamp can be set manually. By default the whole video will be processed (except the last minute, see below).
Use -f (--from) to set the starting point for captures.
Use -t (--to) to set the ending point for captures.
The usual format for time strings is accepted, see Time / Interval syntax.
The end offset is an amount of time from the end of the video that is ignored. In a way it is the reverse to --to.
By default this value is 5.5% of the video length.
Use -E (--end-offset) to set this value. The usual time-string format is accepted, see Time / Interval syntax, percentages are also accepted (and recommended) to adapt its value to the video length.
It will be ignored if set too high.