--- libv4l-0.5.3/libv4lconvert/crop.c	2008-10-13 12:39:39.000000000 +0200
+++ libv4l-0.5.3_test/libv4lconvert/crop.c	2008-11-15 18:40:56.000000000 +0100
@@ -23,6 +23,29 @@
 #include <string.h>
 #include "libv4lconvert-priv.h"
 
+
+static void v4lconvert_reduceandcrop_rgbbgr24(unsigned char *src, unsigned char *dest,
+		const struct v4l2_format *src_fmt, const struct v4l2_format *dest_fmt)
+{
+	int x, y;
+	int startx = ((src_fmt->fmt.pix.width / 2) - dest_fmt->fmt.pix.width) / 2;
+	int starty = ((src_fmt->fmt.pix.height / 2) - dest_fmt->fmt.pix.height) / 2;
+	unsigned char *mysrc;
+
+	src += starty * src_fmt->fmt.pix.bytesperline + 3 * startx;
+
+	for (y = 0; y < dest_fmt->fmt.pix.height; y++) {
+		mysrc = src;
+		for (x = 0; x < dest_fmt->fmt.pix.width; x++) {
+			*(dest++) = *(mysrc++);
+			*(dest++) = *(mysrc++);
+			*(dest++) = *(mysrc++);
+			mysrc += 3; /* skip one pixel */
+		}
+		src += 2*src_fmt->fmt.pix.bytesperline; /* skip one line */
+	}
+}
+
 static void v4lconvert_crop_rgbbgr24(unsigned char *src, unsigned char *dest,
   const struct v4l2_format *src_fmt, const struct v4l2_format *dest_fmt)
 {
@@ -39,6 +62,56 @@
   }
 }
 
+static void v4lconvert_reduceandcrop_yuv420(unsigned char *src, unsigned char *dest,
+				const struct v4l2_format *src_fmt, const struct v4l2_format *dest_fmt){
+	
+		int x,y;
+		int dest_height_half = dest_fmt->fmt.pix.height / 2;
+		int dest_width_half = dest_fmt->fmt.pix.width / 2;
+		
+		int startx = ((src_fmt->fmt.pix.width / 2) - dest_fmt->fmt.pix.width) / 2;
+		int starty = ((src_fmt->fmt.pix.height / 2) - dest_fmt->fmt.pix.height) / 2;
+		unsigned char *mysrc = src + starty * src_fmt->fmt.pix.bytesperline + startx;
+		unsigned char *mysrc2;
+		
+		/* Y */
+		for (y = 0; y < dest_fmt->fmt.pix.height; y++){
+			mysrc2 = mysrc;
+			for (x = 0; x < dest_fmt->fmt.pix.width; x++){
+				*(dest++) = *mysrc2;
+				mysrc2 += 2; /* skip one pixel */
+			}
+			mysrc += 2*src_fmt->fmt.pix.bytesperline; /* skip one line */
+		}
+	
+		/* U */
+		mysrc = src + src_fmt->fmt.pix.height * src_fmt->fmt.pix.bytesperline +
+				(starty / 2) * src_fmt->fmt.pix.bytesperline / 2 + startx / 2;
+		for (y = 0; y < dest_height_half; y++){
+			mysrc2 = mysrc;
+			for (x = 0; x < dest_width_half; x++){
+				*(dest++) = *mysrc2;
+				mysrc2 += 2; /* skip one pixel */
+			}
+			mysrc += src_fmt->fmt.pix.bytesperline ; /* skip one line */
+		}
+	
+		/* V */
+		mysrc = src + src_fmt->fmt.pix.height * src_fmt->fmt.pix.bytesperline * 5 / 4
+				+ (starty / 2) * src_fmt->fmt.pix.bytesperline / 2 + startx / 2;
+		for (y = 0; y < dest_height_half; y++){
+			mysrc2 = mysrc;
+			for (x = 0; x < dest_width_half; x++){
+				*(dest++) = *mysrc2;
+				mysrc2 += 2; /* skip one pixel */
+			}
+			mysrc += src_fmt->fmt.pix.bytesperline ; /* skip one line */
+		}
+	
+		
+}
+
+
 static void v4lconvert_crop_yuv420(unsigned char *src, unsigned char *dest,
   const struct v4l2_format *src_fmt, const struct v4l2_format *dest_fmt)
 {
@@ -79,10 +152,19 @@
   switch (dest_fmt->fmt.pix.pixelformat) {
     case V4L2_PIX_FMT_RGB24:
     case V4L2_PIX_FMT_BGR24:
-      v4lconvert_crop_rgbbgr24(src, dest, src_fmt, dest_fmt);
+			if (src_fmt->fmt.pix.width <= 2 * dest_fmt->fmt.pix.width &&
+						 src_fmt->fmt.pix.height <= dest_fmt->fmt.pix.height *2 )
+				v4lconvert_reduceandcrop_rgbbgr24(src, dest, src_fmt, dest_fmt);
+			else
+				v4lconvert_crop_rgbbgr24(src, dest, src_fmt, dest_fmt);
       break;
     case V4L2_PIX_FMT_YUV420:
-      v4lconvert_crop_yuv420(src, dest, src_fmt, dest_fmt);
+			if (src_fmt->fmt.pix.width <= 2 * dest_fmt->fmt.pix.width &&
+						 src_fmt->fmt.pix.height <= dest_fmt->fmt.pix.height *2 )
+				v4lconvert_reduceandcrop_yuv420(src, dest, src_fmt, dest_fmt);
+			else			
+      	v4lconvert_crop_yuv420(src, dest, src_fmt, dest_fmt);
+			
       break;
   }
 }