Devin Heitmueller wrote: > On Wed, Nov 25, 2009 at 12:59 PM, Dale Pontius <[email protected]> wrote: >> Using hvr-1600 capture cards on the NTSC side. All works well, but when >> playing back, or especially on live TV (In MythTV) the image centering >> is a bit off - down and to the right. In addition, the top line of the >> image is "itchy", flickering and so forth. >> >> Are there knobs somewhere to recenter the image? >> >> I presume the itchy top line has something to do with interlacing... >> It is present in MythTV, but disappears after transcoding. Is this >> something the right de-interlacer would fix? What should the >> de-interlacing situation be when I'm using NTSC TV-Out on the video card? >> >> Should this question really be asked on the MythTV list, also? I know >> the re-centering question is probably more appropriate here, and moving >> the image up might hide that top line, but perhaps the interlacing >> issues are better asked there. >> >> Thanks, >> Dale Pontius > > I can comment better if you provide a screen capture of the issue. > However, it sounds like you are seeing the VBI information at the top > of the screen, which is usually hidden by a television's "overscan" > area. > I'll have to look into how to get a screenshot. I normally run fullscreen, which makes using screenshot tools (which I don't often do anyway) kind of tough to use. But that's also why I was mention looking for a knob to recenter the image. There's black to the left and top of the image, and it flows all the way to the right and bottom sides. Seems to me a little recentering plus a little overscan could take care of it just fine. But with the image shifted down as it is, enough overscan to take out the "itchy line" takes out too much else.
Quantitatively, the down-right shift is on the order of the width of the typical single-height taskbar of the typical window manager. (In the current case, xfce - taskbar on top.) I'll find the time to look harder at the screenshot issue. When I've needed to do it before, I've used "xv" - I just don't do it often. Thanks, Dale Pontius _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
