Dear John, Thank you for your reply. I'm not sure that there is anything wrong with my X environment. The application "tvtime", for instance, is able (with the same environment) to display flicker-free video with menus and channel information overlaid. I'm still hoping for a better clue. Thanks, Justin <div class="gmail_quote">On Wed, Jun 4, 2008 at 9:37 AM, Bridgman, John <<a href="mailto:John.Bridgman@amd.com" target="_blank">John.Bridgman@amd.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;"> >>From: "Justin Anderson" <<a href="mailto:justin@rayonix.com" target="_blank">justin@rayonix.com</a>> >>I'm trying to resolve a thorny issue. I'm working on an application built with C/X/Motif in which we have a window where the feed from a video camera is put. We also draw a set of "cross-hairs" (simply two lines) which can be moved with the mouse to target a point on the video feed (for user's visual reference). We add the video with the "XvPutVideo" command. Everything worked OK until the 6000 series of nVidia graphics cards (as well as ATI cards around-about that time). Since then, the cross-hairs are overdrawn by the video. If you move the mouse pointer over the video feed, the video flickers as you move around and, simultaneously, the crosshairs appear. When you stop moving, the crosshairs disappear and the video stops flickering. Accorging to the MythTV website, nVidia cards stopped having a Chroma Key feature with the 6000 series. I'm not sure if that has something to do with it. This makes sense. ATI cards also switched from using overlay-based video to shader-based video (aka TexturedVideo) rendered into the frame buffer, starting with the X1xxx discrete and RS6xx IGP parts. >>I think I can resolve the problem of the cross-hairs being overdrawn by the video feed if I add a Pixmap ClipMask which is black (0) where the cross-hairs are located and white (1) everywhere else. However, the video flickering is still present. My first thought is moving to a composited environment where (hopefully, maybe) the cross-hairs could be composited over top of the rendered video. Not sure, just a thought. The main issue is that the video image is now drawn directly into memory (allowing it to work with a compositing manager) rather than floating over the video memory and being composited via hardware. _______________________________________________ xorg mailing list <a href="mailto:xorg@lists.freedesktop.org" target="_blank">xorg@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/xorg" target="_blank">http://lists.freedesktop.org/mailman/listinfo/xorg</a> </blockquote></div> -- Justin Anderson Software Engineer Rayonix, LLC (formerly mar-usa) <a href="mailto:justin@rayonix.com" target="_blank">justin@rayonix.com</a> 1880 Oak Ave. Ste. 120 Evanston, IL 60201 PH:847.869.1548 FX:847-869-1587