Hi, Roland: NV's Xv also just converts planar yuv (YV12) to packed yuv (VYUY) for display. ( I have had a glimpse of nv_video.c in Xorg6.8.2/7.1.) And that consumes CPU a lot, especially when I use nv's blitter ports to play 16channels X CIF YV12 video stream which each is created as an XvImage and played with XvShmPutImage. Is there any existing patch for this? (I use nv 9550, and it should support planar yuv hardwarely.) If no, would you please provide any suggestion on playing multiple channels of video? <div>On 12/2/06, Roland Scheidegger <<a href="mailto:sroland@tungstengraphics.com">sroland@tungstengraphics.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Roland Scheidegger wrote: > Anyway, the driver really should support planar yuv natively instead of > converting to packed yuv. Not only would it be faster, it would also > need less memory (as the common planar yuv format has the cr and cb > subsampled both vertically and horizontally while packed yuv has it only > subsampled horizontally). Ok, here's a newer version which applies cleanly to git head. It has most problems ironed out, with the exception that moving a video window beyond the screen border still causes ugly things (bogus video if moved to the left, bogus video and segfaults if moved to top). I'm wondering why and how that can work for the other formats... Roland _______________________________________________ xorg mailing list <a href="mailto:xorg@lists.freedesktop.org">xorg@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/xorg">http://lists.freedesktop.org/mailman/listinfo/xorg</a> </blockquote> </div> -- leal @ <a href="http://www.leal.cn">www.leal.cn</a>