Great stuff, Ian. --- Ian Armstrong <[EMAIL PROTECTED]> wrote: > I know that some height combinations can result in > the colours becoming > slightly misaligned vertically. Would this explain > some of what you're > seeing. Set the aspect ratio to square & zoom the > height (usually 'Alt-Z') a > few times to see if the quality improves at a > particular size.
It didn't seem like it was the colors that were misaligned. The artifacts are similar to the ones I photographed before. White OSD stuff generates white artifacts. I call them double ghost-lets but that's because I don't know what I am talking about. They appear to be scaling dependent. When the video region is being stretched or shrunk, in certain circumstances these artifacts appear. They seem the best when the video's not being shrunk or stretched. I'll try the Alt-Z thing and see if it helps in xine. > > This is interesting: > > > > if I omit the -G xxxx part of the xine command, > the > > video is off-center (to the right), by about the > same > > amount as in Myth. > > ivtv-osd: Need to adjust width to src_w 720 dst_w > 768 scaled_w 676 > ivtv: master_width: 001e0b62 X-Coords: src 0 dst > 0 > > The image is placed against the left edge of the > screen, but it's being > stretched. This will give the impression of the > image being shifted to the > right, but this is only because the image is wider. OK, but there is also a black bar along the left edge. If I set Myth to not use the gui settings for tv playback, the black bar disappears and the OSD is centered better, but then I get artifacts. When I use the -G option in xine, the bar also disappears in xine. Without it, it appears in xine, too. > It also means that the > right edge of the image is being lost. If this is True, in Myth. Xine too, if I don't use the -G stuff. > xine I found a single left > click in the xine window causes the display to snap > to the correct place. By > using the -G option you prevent this error from > happening. Good. I should keep using it then. > ivtv-osd: Need to adjust width to src_w 720 dst_w > 642 scaled_w 808 > ivtv: master_width: 0023e941 X-Coords: src 0 dst > 63 > > ivtv-osd: Need to adjust width to src_w 720 dst_w > 720 scaled_w 720 > ivtv: master_width: 00200002 X-Coords: src 0 dst > 24 > > Looking at these two indicates the image is being > right shifted by 24 pixels > from where it should be. If this is Myth, check your > settings for a > horizontal offset. I don't remember what settings I used for this particular message entry, but when I changed the offsets and percentages under "overscan" in myth, it didn't change the size or position of the video, at least with "use gui size for playback" turned off. IIRC it also didn't change the position of the OSD, which it usually does. Should I turn this back on and experiment with different overscan settings? > With the new driver the destination coordinates are > now honoured. While the > previous version had the image stuck in the top > left, the image can now be > placed anywhere. So what you're now seeing may not > be a bug in the driver, > but more a case of it's now doing what it's being > told to do. That's a good thing, I think. Could you tell me which settings I should be messing with in Myth? There's so many combinations; in the past I just sort of messed with the settings until the output looked good. A case of "keep kicking it until it does what you want it to do". :D I should emphasize that the video quality looked great, was centered and fit the screan, and had low artifact level for xine when I set the geometry (-G) option and used "Auto" for the aspect ratio mode. But that was just for xine; it's harder to find such a good combination in Myth. All this centering stuff keeps me wondering if I'm doing something else wrong. Eh well. ------------------------------------------------------- This SF.Net email is sponsored by the 'Do More With Dual!' webinar happening July 14 at 8am PDT/11am EDT. We invite you to explore the latest in dual core and dual graphics technology at this free one hour event hosted by HP, AMD, and NVIDIA. To register visit http://www.hp.com/go/dualwebinar _______________________________________________ ivtv-devel mailing list ivtv-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ivtv-devel
