Trim the input so that the output contains one continuous subpart of the input.

This filter accepts the following options:

start

Specify time of the start of the kept section, i.e. the frame with the timestamp start will be the first frame in the output.

end

Specify time of the first frame that will be dropped, i.e. the frame immediately preceding the one with the timestamp end will be the last frame in the output.

start_pts

Same as start, except this option sets the start timestamp in timebase units instead of seconds.

end_pts

Same as end, except this option sets the end timestamp in timebase units instead of seconds.

duration

Specify maximum duration of the output.

start_frame

Number of the first frame that should be passed to output.

end_frame

Number of the first frame that should be dropped.

start, end, duration are expressed as time duration specifications, check the "Time duration" section in the ffmpeg-utils manual.

Note that the first two sets of the start/end options and the duration option look at the frame timestamp, while the _frame variants simply count the frames that pass through the filter. Also note that this filter does not modify the timestamps. If you wish that the output timestamps start at zero, insert a setpts filter after the trim filter.

If multiple start or end options are set, this filter tries to be greedy and keep all the frames that match at least one of the specified constraints. To keep only the part that matches all the constraints at once, chain multiple trim filters.

The defaults are such that all the input is kept. So it is possible to set e.g. just the end values to keep everything before the specified time.

Examples:

• drop everything except the second minute of input

  ffmpeg -i INPUT -vf trim=60:120

• keep only the first second

  ffmpeg -i INPUT -vf trim=duration=1