On 9/21/05, <b class="gmail_sendername">Lee</b> <<a href="mailto:mythtv@varga.co.uk">mythtv@varga.co.uk</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
> >><br><br>> > >> > System specs:<br>> > >> ><br>> > >> > Myth 0.18<br>> > >> > Nvidia FX5200, 7667 drivers<br>> > >> > 2x HD-3000 capture card
<br>> > >> > 800x600 through TV-out over s-video.<br>> > >> ><br>> > >> > I had my Myth system setup and everything was working<br>> > great...until
<br>> > >> the fan on the video card went bad and the system started<br>> locking<br>> > >> up.<br>> > >> ><br>> > >> > I was using a Nvidia 6200 AGP video card but I replaced
<br>> it with a<br>> > >> fanless FX5200 card. After I replaced the video card and<br>> rebooted,<br>> > >> the Myth interface looked exactly the same as before,<br>> filling the
<br>> > >> screen with very little overscan. I then attempted to<br>> playback some<br>> > >> recorded TV and discovered that on 16:9 material, at least<br>> > 10-15% of
<br>> > >> the picture is missing on the right side. 4:3 material<br>> seems to<br>> > work<br>> > >> fine.<br>> > >> ><br>>
> >> > This did not happen with the
6200 card. I didn't change any<br>> > settings<br>> > >> in .nvidia-settings-rc or in XF86Config-4, so I don't<br>> know what's<br>> > >> causing this. Does anybody have any ideas?
<br>> > >><br>> > >> Different video cards sit the screen in slightly<br>> different places,<br>> > >> it's just a fact of life. You'll need to tinker with the
<br>> > modeline in<br>> > >> the XF86Config-4 file, just take it slowly.<br>> ><br>> > > I don't think that's the problem. The X desktop and the<br>> Myth UI both
<br>> > > look correct. Neither of them is getting 10-15% of the<br>> picture<br>> > chopped<br>> > > off on the right side. I only see the problem during 16:9<br>> video
<br>> > > playback. I have Myth configured to use the same video<br>> mode for<br>> > the GUI<br>> > > and for playback, so it isn't that either.<br>> ><br>
> > Are you definitely running your desktop in the same 16:9 mode?<br>> > Do you have any other modelines defined?<br>> ><br>> ><br>> > I really appreciate the help.
<br>> ><br>> > My desktop is definitely running at 800x600. This is a 4:3 mode.<br>> > There are other modelines defined, but as I said before I didn't<br>> > change anything in XF86Config-4 when I switched video cards. I'll
<br>> > delete everything besides 800x600 to see if it makes a difference.<br>> > The Myth UI is running full screen.<br>> ><br>> > Let me try to clarify the problem.<br>> >
<br>> > Desktop resolution is 4:3, displaying on my TV via s-video.<br>> > I'm recording OTA HD.<br>> ><br>> > 4:3 shows that were broadcast with 16:9 aspect ratio display<br>> with grey
<br>> > bars on the sides. Changing Myth to 16:9 Zoom aspect ratio makes it<br>> > use the full screen. This is the behavior I expect.<br>> ><br>> > 16:9 shows that used to take the full width of the screen with
<br>> black<br>> > bars at the top and bottom now have 10-15% of the picture pushed off<br>> > the right hand side of the screen. Regardless of what aspect<br>> ratio I<br>> > tell Myth to use for display, some of the picture is always lost.
<br>> > 16:9 stretch seems to be the closest to keeping all the<br>> picture. With<br>> > my old video card, I could leave the myth aspect ratio set to<br>> > "default" and I wouldn't lose any picture.
<br>> ><br>> That's exactly my point, 16:9 goes off the screen, it doesn't<br>> matter if<br>> it's the desktop or Xine.<br>> All s-video out graphics cards generate an analogue signal, just
<br>> because<br>> you're using the same modeline with the new card as with the old one<br>> doesn't necessarily mean that the picture will appear in the same<br>> place<br>> on the tv/monitor. The modeline controls the pixels x-y, the physical
<br>> width-height and the x-y positioning on the screen, but it's all<br>> relative due to inconstancies in the hardware.<br>><br>> Remove all the modelines apart from the ones you need, find a good
<br>> modeline explanation on Google and start tinkering.<br>> Adjust them a little at a time and with a bit of work, you'll be<br>> able to<br>> tweak it so it's perfect.<br>><br>><br>>
<br>> I understand what you are saying, but could you please explain to me<br>> how or why Myth is switching to a different modeline during video<br>> playback? It shouldn't be doing that should it? The modeline I'm
<br>> running is 4:3, and the picture doesn't go off the screen when viewing<br>> the X desktop or the Myth UI. Why would it suddenly switch to a<br>> different modeline for video playback? Shouldn't it just scale the
<br>> 16:9 video to fit the 4:3 modeline?<br><br>Is it the Myth video player or Xine? As I understand it, if you try and<br>view 16:9 content it will change resolution, rather than rescale the video.<br>Your modelines say that's OK, so that's what it's doing... If you don't
<br>want it to do that, then remove the modelines (except the 800x600) and<br>it won't be able to...<br><br><br></blockquote></div><br>
This was happening when watching shows I had recorded using Myth and playing back using Myth.<br>
I switched from 800x600 to 640x480 and that fixed the problem. I have
no idea why though.<br>
Anyway, thanks to everybody for the help.<br>