Video in top left corner

[pBS]

after setting aac decoderr in config.xml, it still shows up as disabled...ffdshow audio decoder..works for aac normally..

aspect ratios still weird, only fill seems to work right...everything else is squeezed to top of screen..sometimes top-left...even auto..
on 16:9 source, it seems to work ok, but everything else is squished..check that, even 16:9 source is bad..

seems to only be xp as win7 looks fine all around..

[sub]

after setting aac decoderr in config.xml, it still shows up as disabled...ffdshow audio decoder..works for aac normally..

aspect ratios still weird, only fill seems to work right...everything else is squeezed to top of screen..sometimes top-left...even auto..
on 16:9 source, it seems to work ok, but everything else is squished..check that, even 16:9 source is bad..

seems to only be xp as win7 looks fine all around..

If you test with a .ts file (so the decoder choices are used), and disable hardware acceleration in the decoder, does the problem go away?

[Graham]

If you test with a .ts file (so the decoder choices are used), and disable hardware acceleration in the decoder, does the problem go away?

The symtoms that pbs describes for fiddling with aspect ratio are a good match to what happens here. I am pretty sure that my problem is nothing to do with DXVA but I'll do the tests tomorrow to be quite sure. Everything that I have tried so far was with Live TV and ith recordings made with NPVR (i.e. .ts files ... I assume).

I have no such problems with PVRX2 and I am pretty sure that it is using DXVA.

[pBS]

nope, it works fine with .ts and no accelleration [mpv decoder]
same video with ati decoder [dxva] or ffdshow[semi-dxva] looks bad on aspect...
maybe a bug in dxva + renderer in XP?

[sub]

nope, it works fine with .ts and no accelleration [mpv decoder]
same video with ati decoder [dxva] or ffdshow[semi-dxva] looks bad on aspect...
maybe a bug in dxva + renderer in XP?

Yeah, maybe.

[pBS]

doesn't happen with h264 vids tho...either mkv,m2ts or avi...?
only mpeg2 dxva...which i heard for years is broken in xp, but i always got semi-accell working fine..same behavior as in win7..
so it must be something about the new mode of displaying it that is buggy..
dxva worked fine with the old methods..

[johnsonx42]

just to clarify, I get the described problem when using NPVR for LiveTV (which is .ts of course) and for playing back .DVR-MS files recorded with GB-PVR. The same system (as per my sig) has no problem using GB-PVR with any renderer. In NPVR the problem occurs with VMR9, but not EVR, and so far seems to only occur with 1080i channels or recordings (though I've not had time to certify that absolutely).
Per my sig, the graphics card is an ATI HD4550. I'm using the same driver I've been using since I installed Win7RTM in early March. The only nVidia in the system is the mainboard chipset.

edit: oh, yes, the Fill aspect ratio (0,0,1,1) looks ok, all the others have the problem.

[sub]

edit: oh, yes, the Fill aspect ratio (0,0,1,1) looks ok, all the others have the problem.

Is it the same as pBS, with the aspect ratio working correctly with hardware acceleration disabled in the decoder you're using?

[johnsonx42]

I'm using the Microsoft DTV-DVD Decoder from Windows 7. It doesn't seem to have any configuration options? Perhaps I will try some other decoder, maybe ATI MPEG-2 from AVIVO, but the Microsoft one has always worked so well I've never had any reason to even install anything else since I went to Windows 7.

Also, to clarify the conditions under which I get the problem: HD 1080i ALWAYS. HD 720p, never as far as I've seen. SD, mostly not, but some channels seem to show a different version of the problem where the video is moved horizontally to the left but not skewed vertically; one channel even bounces back and forth between normal and skewed a couple of times per second.

I do tend to agree this has to be something between the decoder, renderer and video card driver, but why does the exact same system exhibit no problems with GB-PVR?

[sub]

I do tend to agree this has to be something between the decoder, renderer and video card driver, but why does the exact same system exhibit no problems with GB-PVR?

Because GB-PVR didnt not use the render part of the VMR9 renderer, and instead use a custom renderer, aka 'VMR9 Custom'. I was hoping to avoid adding something similar, but may have to.