knickers

#!/bin/bash
set -e

usage() {
	echo "Usage: $0  [options]  source.ext  destination.gif"
	echo '    -c     crop output image. W:H:X:Y  Pixels from top left corner'
	echo '    -fps   output Frames Per Second'
	echo '    -s     scale output image. X:Y  ex: 480:360 or 480:-1 or -1:360'
	echo '    -ss    start time in hh:mm:ss.xxx or seconds'
	echo '    -t     duration in hh:mm:ss.xxx or seconds'

knickers

Cut video

$ ffmpeg -i input.mp4 -ss HH:MM:SS.xxx -c copy -t HH:MM:SS.xxx output.mp4

Or use -to to specify end timestamp instead of duration. Leave off the end time to go to the end of the video.

Crop video

$ ffmpeg -i input.mp4 -filter:v "crop=w:h:x:y" output.mp4

knickers

How to make multiple pull requests to a forked repository.

One-time preparation

From inside the forked repository, add a new remote pointing to the upstream repository.

$ git remote add upstream git://github.com/upstream/repo.git
$ git pull upstream master