New ATI 785g [HD4200 onboard]

[BigMoose]

How do you get ffdshow to do smooth pans on 1080i content? Looks pretty horrible when I've tried. Works great on 1080p Blurays. This is on my 780G HD3200. Only smooth looking pans on sport I can get is using PDVD7/8. It's not CPU bound though when I try with ffdshow or CoreAVC, so maybe I have something set wrong?

[pBS]

ffdshow smooth only for mpeg2 video...for 264 it's pretty taxing...
to get hw deinterlace for either, set *only* NV12 colorspace, and check the interlace flag below that..
even works on Intel IGP, NV12 is default colorspace for dxva says Microsoft..

oh and mind you i'm using a real 3450 card, so may not be as good on yours, tho it should be close...

i must add however, that this 4650 handles blurays with perfection with only MPC Video Decoder, and the 3xxx's wouldn't, only cyberlink worked perfectly..both VC1 and H.264..

now, i get full streaming mode on bd without going thru that big install, or putting on MS vc1 codecs..
the 34xx/32xx just weren't up to it.. 36xx ok tho..

[BigMoose]

Hmm, annoyingly CoreAVC was already set to use NV12 and hardware deinterlacing. But it looks awful on H264 sport pans. I've not tried playing with ffdshow cause gbpvr cant use it for live TV or recorded playback... When i last played in Graphstudio ffdshow was similar to CoreAVC.

The latency prog posted above said my machine has no problems and should be fine. The stutters are few but annoying none the less (and only on H264, not mpeg2, SD news tickers are perfect).

Would I be right in thinking that if I stick a HD4650 in the problems would go away? Are they better than nvidia cards? The machine is only used for GBPVR but I am annoyed I cant get perfect HD playback. It's so so close, but the few stutters really annoy me!

[pBS]

yep, so far the 4650 is liquid smooth...not a single stutter on h264 yet... not even a hint..
and mpeg2 is great with ati codec, and ffdshow looks great on mpeg2 also..[but isn't full accell]
i'd bet even 4350's are good too as they have twice the stream processors[80] as the 34xx series, and they were just slightly off..
4350 benchmarks seem to be higher too..the bump to 80 seems to have been where they skimped too much on the previous models..

to use ffdshow for tv, [if it's mpeg2] you have to set mpg2 codec as libmpeg2 instead of avcodec as avcodec doesn't work for livetv for some reason...[libmpeg2 also allows it to be used for dvd decryption, but you have to add it to config.xml as supported dvd decoder yourself] and use beta6 or better of ffdshow tryouts...

for my 3450s, ffdshow does best smooth mpeg2 even tho it's not accelerated..
[leading me to believe that uvd isn't quite up to decoding hd]
but then i haven't tried latest drivers on it yet, still using 8.11 as they worked properly..

seems like they stopped driver development for sub HD-xxx cards at 9.3...!!
so far i'm really liking the 9.7 drv on hd cards..[includes 780g]

i found out dxva streaming is pretty simple for the codec...basically just a colorspace change to NV12, and set output fourcc to "DXVA" and send it all to renderer...the card does the rest...[if it can handle it]
card has to have a VLD [variable length decoder] to do streaming, and i haven't seen any mpeg2 vld cards yet, but ati codec does full accell for mpeg2 fulll hardware decode in xp..mpeg2 needs card specific tweaks to do dxva...that's why MPC decoder doesn't have mpg2..

so it would seem if your card can't play well with MPC 264 decoder then it just can't do it, without 'tweaks' like the cyberlink codec does...
[i think they just rearrange the output to limit stream procs needed]

[BigMoose]

After getting annoyed with the 780G just not quite delivering (it was so close!) and seeing that 4650s were under 50 quid I decided to get one. It's fantastic! Does 1080i H264 with the OSD up perfectly. Not a single stutter. Everything displayed at 1080p. Still using PDVD8 H264 as I still cant get CoreAVC to deinterlace nicely on fast sport. But since the PDVD8 codec looks fantastic I'm not complaining.

Did you say earlier that these cards help with encoding into H264? What do you use to do that? Thanks for your help as I am now very happy with perfect HD playback (which is what I bought the 780G for in the first place :mad

[pBS]

yea, i was surprised at how effortless it was...i even got a low profile card
with nearly 10 times the stream processors, it seems to have room to spare now instead of straining to get by....

to get the accelerated ENcoding, you can use built-in avivo video converter[it's in 'basic' mode ccc] but i use A's video converter from a guy in Japan...
http://bluesky23.hp.infoseek.co.jp/en/index.html
same guy who makes dxvachecker..[a totally invaluable tool!]
or there are other commercial apps starting to show up on scene, cyberlink and arcsoft have one out already...

oh and try out the MPC video decoder, on 4650 it should be effortless as well and even lower cpu than cyberlink!
tho it probably won't work for livetv if you have h264 tv formats..

oh and with the excellent cooler on my 4650, it seems even cooler than my 3450...and doesn't seem to require much more power either...

[pBS]

oh yea, new drivers available [before release..lol]
http://blogs.amd.com/play/2009/08/14/wha...econ-blog/
down at bottom...
Cat 9.8...fresh from QuakeCon....
Enjoy

[shaunpatrick77]

Just on the original thread topic, I eagerly bought a 785G as the specs seemed to suggest it would easily cope with 1080i, but try as I might I just could not get this sucker to fly properly, even with an amd 250 behind it. Stuttering was the norm with high cpu use in GBPVR. Both the ATI and 9 series cyberlink codecs acted the same way (using 9.9 catalyst)

Strangely it it seemed a lot happier when I tested it graphstudio, using the graphs that GBPVR created. Weird.

In frustration I dropped in my old nvidia 7600GS and the problems went away, although with a slight drop in picture quality.

Has anyone managed to get a 785G/4200 to drive a full HD lcd in 1080p or 1080i successfully. Or is on board video, even with a 4200HD not the way to go?

[BigMoose]

You should be able to get it to run with low CPU usage (at least I never had problems with my HD3200 on my 780G). If you're getting it to do it in graphstudio you should be able to do so in GBPVR. I found that despite playing with graphstudio and merits, often it'd ignore what I'd set as higher merit and pick the wrong codec in GBPVR. Have you checked the graph GBPVR produces is as you'd expect?

[liteswap]

I find with a 780G and an ATI 3200 that I can view 1080p without difficulty and with CPU use around 30-40% for HD, about half that with SD. I'm using ffdshow throughout.