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Old 13th January 2012, 01:37   #8141  |  Link
Andy o
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Quote:
Originally Posted by SamuriHL View Post
I know the AMD crowd is itching for hardware assisted decoding to use with madVR.
Is that true anymore, for most? I know it's not for me, deinterlacing was the last piece of the software-decoding puzzle and madVR has fixed that beautifully. It's been a few years since H.264 progressive was very demanding on current CPUs.
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Old 13th January 2012, 01:39   #8142  |  Link
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Is that true anymore, for most? I know it's not for me, deinterlacing was the last piece of the software-decoding puzzle and madVR has fixed that beautifully. It's been a few years since H.264 progressive was very demanding on current CPUs.
Yes. It's one of the most asked for things. Does it TRULY matter to most? Probably not. For my laptop it'd make a big difference. For my HTPC, not really. For a lot of people, it's something they want. Notice, I didn't say NEED.
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Old 13th January 2012, 01:47   #8143  |  Link
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Oh, I don't doubt it's a good thing, just wondering if people that think they need it (or even want it) are a bit misguided, cause for instance, system efficiency (was evidenced in VipZ's for instance) can suffer in many cases, contrary to popular belief that GPU decoding is always more efficient. You don't need a super powerful GPU for that to be true, either.
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Old 13th January 2012, 01:52   #8144  |  Link
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My laptop and my bedroom HTPC would not be able to play video without GPU decoding. My laptop I've been able to work around the issue as it's faster than my bedroom HTPC, but, it definitely benefits from GPU decoding. Any modern CPU, however, is more than sufficient, yes. Some day I'll be getting a new laptop and rebuiding both HTPC's, but, until that happens......
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Old 13th January 2012, 02:17   #8145  |  Link
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Originally Posted by nevcairiel View Post
Too bad, i would've hoped for faster.
Here is a second try:
http://files.1f0.de/lavf/LAVFilters-...-perftest2.zip
ATI HD 5750: ~51,2 fps (CrowdRun 1080p50)
Also, crashes with Hi10P material (instead of falling back to software decoding)
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Old 13th January 2012, 10:58   #8146  |  Link
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Nev, if you get DXVA2 working for AMD cards, will it work for nVidia cards too? If so, what are the advantages/disadvantages compared to CUVID?


By the way I get 57 FPS on average with software decoding on a Core 2 E8400 with CPU usage at ~95%. When using DXVA2 on an AMD Radeon HD3400, I get 59 FPS but CPU usage is still at ~95%. Such a poor GPU (this is an office PC) is probably useless for DXVA2.

Last edited by DragonQ; 13th January 2012 at 11:15.
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Old 13th January 2012, 11:12   #8147  |  Link
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Mobility HD4650
AVG 52.3325fps
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Old 13th January 2012, 11:12   #8148  |  Link
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Quote:
Originally Posted by DragonQ View Post
Nev, if you get DXVA2 working for AMD cards, will it work for nVidia cards too? If so, what are the advantages/disadvantages compared to CUVID?
Compared DXVA2 to CUVID:

Pro:
- Uses potentially less power because CUVID forces max performance mode

Con
- No deinterlacing
- Marginally slower
- Requires D3D interaction (cannot use it with a secondary card)
- No VC-1 interlaced support (unless i manage to fix that)

Note that i also have plans for a "native" DXVA2 mode for people running EVR, which would behave similar to all other DXVA decoders out there.
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Old 13th January 2012, 11:17   #8149  |  Link
DragonQ
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Quote:
Originally Posted by nevcairiel View Post
Compared DXVA2 to CUVID:

Pro:
- Uses potentially less power because CUVID forces max performance mode

Con
- No deinterlacing
- Marginally slower
- Requires D3D interaction (cannot use it with a secondary card)
- No VC-1 interlaced support (unless i manage to fix that)

Note that i also have plans for a "native" DXVA2 mode for people running EVR, which would behave similar to all other DXVA decoders out there.
Thanks. Lower power consumption would be nice, especially for an HTPC, but hardware deinterlacing is a must IMO.
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Old 13th January 2012, 11:18   #8150  |  Link
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If you use EVR or madVR, just let them deinterlace.
It was more important when madVR did not do deinterlacing yet.
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Old 13th January 2012, 12:24   #8151  |  Link
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What deinterlacing does EVR use though? It famously has no options in most media players and the highest quality vector adaptive deinterlacing within CUDA is easily the best I've tried.
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Old 13th January 2012, 13:16   #8152  |  Link
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It should use exactly the same. Its easy enough to compare with some artificial tests like the Cheese Slice test. Differences in the algorithms are clearly visible there.
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Old 13th January 2012, 20:14   #8153  |  Link
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GT240 CUVID
72.2765

GT240 DXVA2
71.8401

M HD4650
52.3325


http://forum.doom9.org/showthread.ph...87#post1548287
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Old 13th January 2012, 20:18   #8154  |  Link
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Quote:
Originally Posted by nevcairiel View Post
It should use exactly the same. Its easy enough to compare with some artificial tests like the Cheese Slice test. Differences in the algorithms are clearly visible there.
Nev already a idea what goes wrong with dirac playback (slowmo) on the promos ?

Btw i find it nice to have now the possibility to switch between Yadif and Render Deinterlacing on the fly seeing the different in Realtime is cool how the GPU utilization goes up when the renderer does the deinterlacing and how it goes down when Yadif does it (and cpu therfore goes up) also comparing is cool this way doing everything Realtime now has such great possibilities for Encoding i love it
Though the Interface to the options is still to hard to reach some should start implementing those possibilities directly in the Player GUIs without needing to click 1000 times to get to them :P
Also using Lav Video + Av Splitter has some great potential it mostly has the same bugs though as Lav Splitter (Mp4 playback) but it allows to switch channels on the fly (.ts) and seems to work equally good with Lav Video (also it has the tray icon control many crave for, though personally i find it useless better is direct Player integration instead of this tray icon control stuff)
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Old 13th January 2012, 22:12   #8155  |  Link
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Good news everyone!

I managed to implement VC-1 interlaced DXVA decoding.
That sure was a bitch, and locked up my GPU driver quite often while testing (thank god Win7 can recover from that), but now it seems to work just fine with both Frame Interlaced and Field Interlaced content!
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Old 13th January 2012, 22:14   #8156  |  Link
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Nev, you rule!
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Old 13th January 2012, 22:17   #8157  |  Link
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Damn, man, that's awesome.
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Old 13th January 2012, 22:28   #8158  |  Link
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Yeah you are the best
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Old 13th January 2012, 23:09   #8159  |  Link
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Is there a reason you skipped DXVA1 for DXVA2?
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Old 13th January 2012, 23:12   #8160  |  Link
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Well, DXVA is only useful for XP users since XP doesn't support DXVA2. Otherwise, DXVA2 is superior, so why not use it?

Supporting a ten year old OS is silly, IMO.
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