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BLIND-CROP(1)		    General Commands Manual		 BLIND-CROP(1)

NAME
       blind-crop - Extract subframes for all frames

SYNOPSIS
       blind-crop [-s |	-S | -t] width height left top

DESCRIPTION
       blind-crop reads	a video	from stdin and prints a	cropped	version	of the
       video to	stdout.	The new	 video	with  have  the	 specified  width  and
       height,	and  will  have	the same length	as the input video.  The left-
       most pixels of the subvideo will	be left	pixels rightward of the	 left-
       most  pixels  of	 the  input video. The top-most	pixels of the subvideo
       will be top pixels downward of the top-most pixels of the input video.

       The selected subvideo may not extend beyond the input video.

OPTIONS
       -s     Instead of resizing the video, set alpha (and all	colour parame-
	      ters) to 0 on each pixel outside the selected region.

       -S     Instead of resizing the video, set alpha (and all	colour parame-
	      ters) to 0 on each pixel inside the selected region.

       -t     Instead of changing the width and	height of  the	output	video,
	      put  the	subvideo side-by-side.	The subvideo's left-most pixel
	      will be positioned left pixels rightward of the  output  video's
	      left-most	pixel, and the subvideo's top-most pixel will be posi-
	      tioned top pixels	 downward  of  the  output  video's  left-most
	      pixel.

REQUIREMENTS
       blind-crop  requires  enough  free  memory to load two full frames into
       memory, one of the size of the source video's frames, and  one  of  the
       size  of	 the target video's frames. However, if	-s or -S is used, only
       memory for one full frame, of the size of the  source  video's  frames,
       are  required. A	frame requires 32 bytes	per pixel it contains.	blind-
       crop has	not been optimised for memory usage, but instead for code sim-
       plicity.

SEE ALSO
       blind(7), blind-extend(1), blind-translate(1)

AUTHORS
       Mattias AndrA(C)e <maandree@kth.se>

				   blind 1.1			 BLIND-CROP(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | REQUIREMENTS | SEE ALSO | AUTHORS

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