> Starting to dig a little bit deeper than the passive use of mjpegtools, I'd > like to know what kind of image is a YUV image once piped ? > Does it fit into scalar, color or vector type of images (or none of them).
The "yuv4mpeg" format is a binary stream that starts with a text formated header describing the content (image size, aspect ratio, frame rate and interlacing information). The header is followed by frames, which all begin by "FRAME\n" followed by the frame data. The frame data are raw pixels in YUV planar format. Each pixel is described by 3 independant values: Y (luminance), U (blue chrominance) and V (red chrominance). Those values are split in 3 independant planes (you can think of a plane as an image carrying only part of the pixel - one plane for Y, one plane for U and one plane for V). The U and V planes are downsized by a factor 2 in each direction, and the 3 planes are output one after the other in the byte stream. For a 320x240 image, you get Y(0,0) Y(0,1) ... Y(0,319) Y(1,0) ... Y(239,319) U(0,0) U(0,2) ... U(0,318) U(2,0) ... U(238,318) V(0,0) V(0,2) ... V(238,318) This is called YUV4:2:0 planar format. For more information about the different YUV formats, have a look at http://www.fourcc.org. Laurent Pinchart ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
