Getting the Best out of an Ivy Bridge HTPC: Windows 8, madVR and More..
by Ganesh T S on January 20, 2013 3:00 PM EST- Posted in
- Home Theater
- Intel
- HTPC
- Ivy Bridge
- Windows 8
- Passive Cooling
HTPC Decoding and Rendering Benchmarks: EVR / EVR-CP
In our Ivy Bridge HTPC review, we had covered the CPU / GPU utilization during playback of various types of clips. In the Vision3D 252B review, we had graphs of CPU and GPU loading with various renderers and codecs. Unfortunately, AMD doesn't provide similar data / sensors for use with their APUs. Hence, we had to resort to power consumed at the wall along with GPU loading in the Trinity HTPC review. In order to keep benchmarking consistent across all HTPC reviews, we started adopting the Trinity HTPC review methodology starting with the review of the ASRock Vision HT.
The tables below present the results of running our HTPC rendering benchmark samples through various decoders when using the Enhanced Video Renderer / Enhanced Video Renderer (Custom Presenter) (EVR / EVR-CP). Entries in bold indicate that there were dropped frames which indicate that the unit wasn't up to the task for those types of streams. Fortunately, none of the streams presented any problem to the system and there were no dropped frames. The recorded values include the GPU loading and power consumed by the system at the wall when playing back the streams using MPC-HC v1.6.5.6366 and LAV Filters 0.54.
Enhanced Video Renderer (EVR)
The Enhanced Video Renderer is the default renderer made available by Windows 8. It is a lean renderer in terms of usage of system resources since most of the aspects are offloaded to the GPU drivers directly. EVR is mostly used in conjunction with native DXVA2 decoding.
| LAV Video Decoder (DXVA2 Native) + EVR | ||
| Stream | GPU Usage % | Power Consumption |
| 480i60 MPEG-2 | 24.05 | 35.04 |
| 576i50 H.264 | 21.38 | 36.06 |
| 720p60 H.264 | 26.13 | 36.6 |
| 1080i60 H.264 | 28.9 | 39.95 |
| 1080i60 MPEG-2 | 28.19 | 37.06 |
| 1080i60 VC-1 | 31.23 | 45.57 |
| 1080p60 H.264 | 30.11 | 37.09 |
The GPU is not taxed much by the EVR despite hardware decoding also taking place. Deinterlacing and other post processing aspects were left at the default settings in the Intel HD Graphics Control Panel (and these are applicable when EVR is chosen as the renderer)
Enhanced Video Renderer - Custom Presenter (EVR-CP)
EVR-CP is the default renderer used by MPC-HC. It is usually used in conjunction with MPC-HC's video decoders, some of which are DXVA-enabled. However, for our tests, we used the DXVA2 mode provided by the LAV Video Decoder.
| LAV Video Decoder (DXVA2 Native) + EVR-CP | ||
| Stream | GPU Usage % | Power Consumption |
| 480i60 MPEG-2 | 26.69 | 38.78 |
| 576i50 H.264 | 24.43 | 37.88 |
| 720p60 H.264 | 32.76 | 40.4 |
| 1080i60 H.264 | 40.16 | 42.02 |
| 1080i60 MPEG-2 | 39.75 | 41.62 |
| 1080i60 VC-1 | 40.99 | 48.45 |
| 1080p60 H.264 | 41.33 | 42 |
In addition to DXVA2 Native, we also used the QuickSync decoder developed by Eric Gur (an Intel applications engineer) and made available to the open source community. It makes use of the specialized decoder blocks available as part of the QuickSync engine in the GPU.
| LAV Video Decoder (QuickSync / DXVA2 Copy-Back) + EVR-CP | ||
| Stream | GPU Usage % | Power Consumption |
| 480i60 MPEG-2 | 27.16 | 38.42 |
| 576i50 H.264 | 25.26 | 38.05 |
| 720p60 H.264 | 36.84 | 41.6 |
| 1080i60 H.264 | 44.2 | 43.41 |
| 1080i60 MPEG-2 | 44.32 | 43.02 |
| 1080i60 VC-1 | 43.56 | 43.26 |
| 1080p60 H.264 | 48.28 | 45.13 |
In general, using the QuickSync decoder results in a higher power consumption because the decoded frames are copied back to the DRAM before being sent to the renderer. Using native DXVA decoding, the frames are directly passed to the renderer without the copy-back step. The odd-man out in the power numbers is the interlaced VC-1 clip, where QuickSync decoding is around 5W more efficient compared to 'native DXVA2'. This is because there is currently no support in the open source native DXVA2 decoders for interlaced VC-1, and hence, it is done in software [Clarification: This restriction is only on Intel GPUs. On both AMD and NVIDIA cards, DXVA2 native decode acceleration is supported for all VC-1 streams]. On the other hand, the QuickSync decoder is able to handle it with the VC-1 bitstream decoder in the GPU.
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philipma1957 - Sunday, January 20, 2013 - link
WELL I don't think that I am obsessed.I record Jay Leno, David Letterman, Jimmy Fallon , Craig Ferguson and I record Saturday Night Live. That is about 21.5 hours of tv a week. Now Sometimes they are repeats and sometimes they are lousy . So I don't watch 21.5 hours each week. They also run at 1130 pm to 130 am and they compete for time.
The bottom line is I need 2 tuners and 2 dvrs to do this. Why is that> I use 100 percent free tv with an antenna. So my cost is that of a pair of mac minis and a pair of eyetv tuners.
Watching these via the net results in poor quality video due to my net connection . No matter what I would pay for a net connection the best is that of optimum online 15 down 2 up speed . Now if I buy the cheapest cablevision for tv my 50 dollar net fee bundles with cable tv basic . I go to 64 plus 6 for each box is 76 plus 6 for each dvd is 88. So to be able to time manage my tv via cable it is 38 a month. vs 0 I have had some type of dvd/vcr for 20 years do the math. more then 9000 saved.
NeBlackCat - Monday, January 21, 2013 - link
You're describing a media server there mate, not an HTPC. We're about at the point now where an HTPC needs to be nothing but a cheap networked ARM box.truprecht - Monday, January 21, 2013 - link
Raspberry Pi? Not quite there yet... maybe next gen.The12pAc - Tuesday, January 22, 2013 - link
Was SOOO close to getting on last weekend, just to mess around with..... Cool idea.Golgatha - Monday, January 21, 2013 - link
Not to mention Cinavia will eventually make your ripped media streaming life a living hell Fx1. Enjoy not being able to tinker with the hardware and software. Also, good luck getting updates for all those apps once Panasonic exits the market. Microsoft and open source programs; not going out of the market anytime soon.Fx1 - Tuesday, January 22, 2013 - link
No Cinavia on Panasonic. I am literally playing Blu rays off a HDD.dcaxax - Monday, January 21, 2013 - link
A) The scaling capabilities of your TV are what they are. I'm sure they're quite OK and I'm sure they don't come close to MadVR, but of course if youre happy that's all that counts.\B) Your TV doesn't manage and play all your media including your m4a's, Flac CD Rips etc, and if it does I'm sure the quality is awful unless iof it bitstreams which is unlikely.
C) It also doesn't play any non-typical audio/video formats. Maybe you don't care about that but others do.
D) Your TV may or may not show you your photos or give you skype or any bunch of other things that an HTPC does.
E) Others have made the point about DVR capabilities better.
F) Regardless of any of the above the UI on your TV doesn't come close to XBMC which itself doesn't come close to MediaBrowser (WMC plug-in)
HTPC's were never about playing pirated content. They are intended to provide a single hub for all digital content.
The fact that you are happy with your TV doing that for you, means that you have no need not bother with articles like this. Or indeed post on them.
Fx1 - Monday, January 21, 2013 - link
The TV has a dual core ARM CPU which seems to get the job done and the best 2D image money can buy. I really only try and use HD content.When i download my content i have enough choice between x264 Divx and other popular formats. If i really need to use an odd format any Phone or laptop or PC can stream directly to the TV via DNLA and realtime encode.
Skype, Youtube Netflix and other stuff is baked right into the TV with even a store to buy games.
My Galaxy S3 can use an app to share video pictures and Web pages direct to the TV and the TV can use these features without the phone too. I can play a HD movie directly off my phone in 2 clicks with the picture being perfectly good as i had used the HDD.
Im sure you can find stuff that i cant do that you can do on a HTPC but lets face it the costs are adding up and for what?
jabber - Monday, January 21, 2013 - link
Kind of agree with you there. I used to know quite a few folks that ran HTPC boxes but over the past few years they have all got rid of them and just switched to off the shelf options instead.I even had a go back in the day but more trouble than it was worth.
This is UK based too.
WeaselITB - Monday, January 21, 2013 - link
How do you watch independent or third-party shows on websites NOT on YouTube or Netflix? PBS documentaries, indy web-original content, etc.You state that you use a phone/laptop/PC to stream via DNLA ... well, then what's the point of your super-TV when you can have a dumb TV and an HTPC and accomplish everything without needing to stream off another box? If a vast majority of the online content you watch is via Netflix/YouTube, then sure, I'll bet that the super-TV works great. If it isn't (as is my case), then a separate HTPC is the better bet.
-Weasel