Steve Haynal (steve@xxxxxxxxxxxxxxxxxx): > I have an ATI TV wonder card (regular, not value) that works fine > except for one problem -- the picture does not quite fill the width of > the window when running Xawtv or Zapping. Vertically, the picture fits > fine. But horizontally, about 5% of the left side and 3% of the right > side are black. Also, the picture looks slightly squeezed when > compared to running under Windows. I see the same problem when running > full screen or not full screen and even when starting xawtv with > -noxv. I have tried versions 0.96, 0.7.105 and 0.7.100 of the bttv > driver and see no difference. I have verified that the various bttv > versions do load from the kernel logs. I am running kernel 2.4.20 on > an i815 motherboard. I am in the US and am using NTSC. I have tried > various tuner configurations via insmod with no luck. I suspect that > there is some width calculation that is slightly off for NTSC. If > someone could give me some good ideas of where to fiddle in the > source, I can try to fix it on my end. The calibration is not off. The first few pixels on the left and right sides of the active area are transitional samples that ramp up from black. You don't see this on a TV because it is in the overscan area. In my TV app, tvtime, we have a new mode to detect the transitional samples and skip them, I call it the scanline length bias amount, but it's hard to get this right since it depends on the channel. I'm not sure whether to actually set different bias per channel or not. Also, in the next version of tvtime we have an overscan mode, where you can focus in on the center part of the image just like a television does. Both of these features are in the CVS version of tvtime, and will be included in the 0.9.7 release we will post tomorrow: http://tvtime.sourceforge.net/ -- Billy Biggs vektor@xxxxxxxxxxxx
