%YUVREAD	Read frame from a YUV4MPEG file%%	[y,u,v] = yuvread(yuv, skip)%	[y,u,v, h] = yuvread(yuv, skip)%%	Returns the Y, U and V components from the specified frame of%	YUV file.  Optionally returns the frame header h.%% SEE ALSO:	yuvopen yuv2rgb yuv2rgb2%%	Copyright (c) Peter Corke, 2004  Machine Vision Toolbox for Matlab% Peter Corke 2004% $Header: /home/autom/pic/cvsroot/image-toolbox/yuvread.m,v 1.2 2005/10/23 12:06:06 pic Exp $% $Log: yuvread.m,v $% Revision 1.2  2005/10/23 12:06:06  pic% Doco update.%%function [Y,U,V, h] = yuvread(yuv, skip)	if nargin == 1,		skip = 0;	end	while skip >= 0,		% read and display the header		hdr = fgets(yuv.fp);		fprintf('header: %s', hdr);		% read the YUV data		[Y,count] = fread(yuv.fp, yuv.w*yuv.h, 'uchar');		if count ~= yuv.w*yuv.h,			Y = [];			return;		end		[V,count] = fread(yuv.fp, yuv.w*yuv.h/4, 'uchar');		if count ~= yuv.w*yuv.h/4,			Y = [];			return;		end		[U,count] = fread(yuv.fp, yuv.w*yuv.h/4, 'uchar');		if count ~= yuv.w*yuv.h/4,			Y = [];			return;		end		skip = skip - 1;	end	Y = reshape(Y, yuv.w, yuv.h)';	U = reshape(U, yuv.w/2, yuv.h/2)';	V = reshape(V, yuv.w/2, yuv.h/2)';	if nargin == 4,		h = hdr;	end