NAME
	sketch - sketch images

SYNOPSIS
	sketch [ -p ] [ -i iter ] [ -l len ] [ -s sec ] file ...

DESCRIPTION
	Sketch uses lines of random length, orientation and
	color to approximate input images. The line colors are
	randomly selected from a palette of all the colors in
	the input image.

	If no arguments are given, sketch will process
	incrementing input filenames, starting with
	input001.png. This number can be changed using the
	-1 option.

OPTIONS
	-1 num
	      offset of first frame (default 1)
	-P    parallelize (slower on short lines)
	-i iter
	      number of iterations (-1 for infinite) (default
	      5000000)
	-l len
	      line length limit (default 40)
	-n frames
	      number of input frames to sketch
	-p    remove duplicate colors from palette
	-s sec
	      interval between incremental saves, in seconds
	      (default -1)
	-t sec
	      statistics reporting interval, in seconds
	      (default 1)

EXAMPLES
	ffmpeg -i input.webm input%03d.png
	sketch input*.png
	ffmpeg -i frame%03d.png -c:v vp8 output.webm