Hi, I'm not sure the meaning of variables in v4l2_pix_format and v4l2_plane. Especially bytesperline, sizeimage, length and bytesused. v4l2_pix_format.width = width v4l2_pix_format.height = height v4l2_pix_format.bytesperline = bytesperline [in bytes] v4l2_pix_format.sizeimage = bytesperline * buf height -> Is this right ? v4l2_plane.length = bytesperline * buf height -> Is this right ? I don't which is right. v4l2_plane.bytesused = bytesperline * (top + height) v4l2_plane.bytesused = bytesperline * height v4l2_plane.bytesused = width * height * bytesperpixel v4l2_plane.bytesused = bytesperline * (top + height) - (pixelperline - (left + width)) * bytesperpixel I assumed the following buffer. | | |<--------------------- bytesperline --------------------->| | | +----------------------------------------------------------+----- | ^ | ^ | | | | | | | | t | | | o | | | p | | | | | | | | | | V |<--------- width ---------->| | | |<-- left -->+----------------------------+ - | | | | | ^ | | | | | | b | | | | | u | | | | f | | | h | | | | e | h | | | i | e | | | g | i | | | h | g | | | t | h | | | | t | | | | | | | | | | | | | | v | | | +----------------------------+ - | | | | | | | | | | v +----------------------------------------------------------+----- Best regards, -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
