Hi, I have the following problem. I have two v4l device in my box, one bttv card and a DVB (saa7146) card. When I start X and look at xvinfo, I see the expected three adapters, the DVB card (port 67), the bttv card (port 68) and the hardware scaler of my MGA G200 (port 69). When I start xawtv with -xvport 68 I get a picture, which I can enlarge to fullscreen size (1280x1024 scaled to 1280x960 because of aspect ratio). Now I start with -xvport 67 and I get a picture, but can't scale it to fullscreen. The verbose messages of xawtv are concerning xv and Xvideo are the following (grep -i xv): for dvb: main: xvideo extention... Xvideo: 3 adaptors available. Xvideo: video4linux: input video, ports 67-67 Xvideo: video4linux: input video, ports 68-68 Xvideo: Matrox G-Series Backend Scaler: input image, ports 69-69 Xvideo: using port 67 for video XV_ENCODING get set, -1000 -> 1000 XV_BRIGHTNESS get set, -1000 -> 1000 XV_CONTRAST get set, -1000 -> 1000 XV_SATURATION get set, -1000 -> 1000 XV_HUE get set, -1000 -> 1000 XV_FREQ get set, 0 -> 16000 xv: get XV_BRIGHTNESS: 32768 xv: get XV_CONTRAST: 32768 xv: get XV_SATURATION: 32768 xv: get XV_HUE: 0 xv: set XV_SATURATION: 0 xv: set XV_BRIGHTNESS: 0 xv: set XV_HUE: -1000 xv: set XV_CONTRAST: 0 Xvideo: video: win=0x1a00049, src=768x576+0+0 dst=384x288+0+0 Xvideo: video: win=0x1a00049, src=768x576+0+0 dst=1280x960+0+32 and for bttv: main: xvideo extention... Xvideo: 3 adaptors available. Xvideo: video4linux: input video, ports 67-67 Xvideo: skipping ports 67-67 (configured other: 68) Xvideo: video4linux: input video, ports 68-68 Xvideo: Matrox G-Series Backend Scaler: input image, ports 69-69 Xvideo: using port 68 for video XV_ENCODING get set, -1000 -> 1000 XV_BRIGHTNESS get set, -1000 -> 1000 XV_CONTRAST get set, -1000 -> 1000 XV_SATURATION get set, -1000 -> 1000 XV_HUE get set, -1000 -> 1000 XV_MUTE get set, 0 -> 1 XV_COLORKEY get set, 0 -> 16777215 xv: get XV_BRIGHTNESS: 35323 xv: get XV_CONTRAST: 26083 xv: get XV_SATURATION: 32505 xv: get XV_HUE: 32768 xv: set XV_MUTE: 0 xv: get XV_MUTE: 0 xv: set XV_SATURATION: -9 xv: set XV_BRIGHTNESS: 77 xv: set XV_HUE: 0 xv: set XV_CONTRAST: -205 Xvideo: video: win=0x1a00049, src=768x576+0+0 dst=384x288+0+0 Xvideo: video: win=0x1a00049, src=768x576+0+0 dst=1280x960+0+32 So there doesn't seem to be a big difference. Is there something a v4l driver has to implement, so that xv scaling will work. Both drivers deliver YUV422 and can write into video memory. Marcus
