780G HD video always Studders

[BigMoose]

Why 64bit... I wish I could remember!! A geeky mate suggested it since I have a copy of ultimate that came with both. Said it might come in handy one day. Although I'm a big enough geek to ignore him! That said, I've never had any compatibility problems with 64bit once I sussed out how to register the 32 bit filters (ie put them anywhere other than the system32 folder). When I rebuilt a few weeks ago I didn't really think about going 32 bit. Which was possibly a mistake as I do get BSODs from the ATI driver from time to time. I really like vista for the hw accelerated EVR. I could never get VMR9 to work perfectly in XP but EVR in Vista is spot on.

[feilh]

Thanks for everyone's suggestions. I'm running VMR9 exclusive. I never get a good picture with EVR.

I tried. MPC - Mpeg Splitter (Gabest). Everything went in slow motion. I forgot to mention that MPV decoder does give me smooth picture, but the deinterlacing looks so bad I prefer the studder of Microsoft MPEG2.

I tried changing the CCC ATI deinterlacing to WEAVE. Its hard to tell if its better or not without more observation, but its still not the flawless look I get outside of GBPVR.

For all you FFDSHOW fans out there. Which version of FFDSHOW do you recommend. The latest 2009 beta or the 2006 production version. I'm running the 2006 production version, and I'm not sure I see all the options you mention. I did set it it just nv12 and some of the deinterlacing boxes I've tried several options. The picture is always worse Microsoft MPEG2.

I still need to find some time to try the above mentioned ATI scripts.

[pBS]

you should look for the ffdshow tryouts versions...
the latest stable is beta 6 i believe...
http://ffdshow-tryout.sourceforge.net/
[download button on right]

that version adds the necessary stuff to send deinterlace info to video card properly...
[auto-progressive or interlaced]
settings below should also work for nvidia cards 9xxx+

[mikeh49]

OK, I think it's time for the PCH NMT, especially with the latest improvements from Martin. This 780G is just an endless chase. My limited testing with FSE indicates that my 9600Pro was better on HD material. Anyone think that a sub $100 video card will fix it? HD4xxx, Geforce 9xxx? Is the shared memory of the 780G the underlying problem?

Not a happy camper.

[feilh]

I have often wondered if a another card would help. I feel like because I can get flawless picture outside of GBPVR, and from comments from others in this thread that more hardware may not fix anything. At least not more ATI hardware. As someone earlier said there seems to be something lost between GBPVR and the way other application are using the direct show filters.

So Nvidia card or a Popcorn hour device may solve the challenge. So might Windows 7 Media Center.

[sub]

At least not more ATI hardware. As someone earlier said there seems to be something lost between GBPVR and the way other application are using the direct show filters.

In general you'll get exactly the same behaviour in GB-PVR as other apps when you use the video decoders and video renderers. GB-PVR doesnt do the playback itself. It just askes the directshow video decoders and renderer to all that side of things. One small difference from other apps that can exist though is that apps that display no OSD graphics often configure the video renderers to use 'non-mixing' mode, which is a little easier on the videocard. Since GB-PVR needs OSD graphics, the video renderers are used in 'mixing mode'. Its possible your 780G video device or drivers just does a bad job in this mode.

In general, I've read a lot of bad comments about these motherboards with embedded ATI graphics. You'd probably find a nvidia or even ati video card will perform a lot better.

[mikeh49]

Thanks for the insight, Sub. Good info. Would this mixing mode difference explain why the same graph (such as, lastgraph.grf from GBPVR) plays better in Graphedit than in GBPVR?

[sub]

Would this mixing mode difference explain why the same graph (such as, lastgraph.grf from GBPVR) plays better in Graphedit than in GBPVR?

I dont know if a grf file retains configuration of the renderer, with things like mixing mode etc.

The other thing that can improve playback is using YUV mode (between decoder and renderer), but again this option isnt available when you've configured the renderer for doing OSD graphics.

[BigMoose]

While my mpeg2 playback is flawless in both 720p and 1080p, the OSD causes major stutters while it's displayed when in 1080p. In 720p it's flawless/smooth when OSD is up... Assume there's nothing I can do about that.

I personally think the lack of usable H264 codecs is an issue (although I appreciate it's not an easy one to solve). Since I can get pretty perfect 1080p playback with Blurays using FFDSHOW or MPC but cant use either in GBPVR for 1080i tv. That said, maybe they'd struggle with 1080i content too and that's where the issue is. It's a shame that CoveAVC is so close, but isn't really useable for sport. It cant cope with the quick panning, which I assume is a system limitation of mine. I would however love to see if either FFDSHOW or MPC work with 1080i broadcast content.

[pBS]

yea, i'm thinkin it's the memory...are you running 800mhz dual mode? [=1600]
it was always real tight with 800 mhz mem cards, but 1000 mhz seems to be just right...
so i'd think you'll have to run dual channel mode 800mhz or dual 667 to get it to run full out...
i think i read somewhere dual channel memory was a 'requirement' for good blueray decode on these...
and cards with actual memory,[as opposed to 'Hyper-Memory'] are always better...
[780g is supposed to be better than those, tho]
on hypermemory cards, in ccc it shows that card's mem speed is tied to main mem speed..
[it changes with changes to main memory speed]

i've started leaning more towards the nv9300 intel-cpu mb's thesedays as that chip has a lot more horsepower..[tho a bit pricey, but made up for by fact i have lots of intel procs lying around]

i still wish i had one of those 780g's to play with...[i love a challenge..LOL]
some people have had great results, who knows, theyhad lots of trouble with monitor/edid so that may just be your issue if 720p looks good...