Discussion Forums > Technology
Video playback on a netbook
sapsa:
I made a little test
Set both acording to this site: http://imouto.my/
results are like this (used same video):
DXVA - 12% - 20% + 1 once 40%
CoreAVC 1.9.5.0 - 13% - 25% + once 61%
CoreAVC 2.0 - 15% - 21% + once 69%
Video used:
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Muxing mode : Container profile=Unknown@4.1
Codec ID : V_MPEG4/ISO/AVC
Duration : 1mn 29s
Bit rate : 13.3 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.267
Stream size : 142 MiB (95%)
Writing library : x264 core 0000000000000000
So acording to CPU use, DXVA is better but
--- Quote ---But there are limitations with the DXVA method, and they are (amongst others):-
* Only certain renderers can be used depending on operating system (overlay mixer and VMR9 for Windows XP, Enhanced Video Renderer for Windows Vista/7).
* Cannot decode videos that was encoded with numbers of reference frames that exceed certain levels.
* Cannot have any intermediate filters (such as ffdshow Video Decoder or DirectVobSub) between the video decoder and the video renderer.
--- End quote ---
first *, is not problem
** can be a problem ?! (or not?)
*** not sure if its a problem ? - why do i need something in between ?
namaiki:
--- Quote ---But there are limitations with the DXVA method, and they are (amongst others):-
* Only certain renderers can be used depending on operating system (overlay mixer and VMR9 for Windows XP, Enhanced Video Renderer for Windows Vista/7).
* Cannot decode videos that was encoded with numbers of reference frames that exceed certain levels.
* Cannot have any intermediate filters (such as ffdshow Video Decoder or DirectVobSub) between the video decoder and the video renderer.
--- End quote ---
There are three limitations and there are also only three things you have to do to meet conditions for DXVA to work; unfortunately that guide has some misplaced settings which can cause stuttering:
All you needed to do (on Windows Vista or 7) was:
1: Select an EVR video renderer (EVR-CP if you need subtitles)
2: Select a DXVA video filter (either mpc-hc's internal one or the MS DTV-DVD video decoder)
3: Tick auto-load subtitles.
Windows XP:
1: Select Overlay Mixer video renderer (VMR9 renderless if you need subtitles)
2: Select a DXVA video filter (generally only mpc-hc's internal one is available)
3: Tick auto-load subtitles.
--- Quote from: sapsa on May 19, 2010, 07:35:28 PM ---first *, is not problem
** can be a problem ?! (or not?)
*** not sure if its a problem ? - why do i need something in between ?
--- End quote ---
** can be a problem, but you can't help it. if an encode is not compatible you will have to re-encode it, or try a compatibility workaround which may show artifacts
*** should not be a problem. usually there is a filter in between to show subtitles, but with auto-load subtitles or with ffdshow dxva filter (don't use on intel GPUs from what I have tried) the subtitles can be placed in a different way.
Then again, with CoreAVC there is no restriction on * or ***, but ** should still apply.
vuzedome:
If you're on nVidia, it can go all the way up to ref=16.
sapsa:
--- Quote from: vuzedome on May 20, 2010, 01:07:20 AM ---If you're on nVidia, it can go all the way up to ref=16.
--- End quote ---
Need a explain here :)
--- Quote from: namaiki on May 19, 2010, 11:00:51 PM ---unfortunately that guide has some misplaced settings which can cause stuttering:
--- End quote ---
Aww, not good I will need to reset settings then
--- Quote ---All you needed to do (on Windows Vista or 7) was:
1: Select an EVR video renderer (EVR-CP if you need subtitles)
2: Select a DXVA video filter (either mpc-hc's internal one or the MS DTV-DVD video decoder)
3: Tick auto-load subtitles.
--- End quote ---
Will try :)
--- Quote ---** can be a problem, but you can't help it. if an encode is not compatible you will have to re-encode it, or try a compatibility workaround which may show artifacts
--- End quote ---
But none of the POPULAR fan/subgroups do that right ? (encoded with numbers of reference frames that exceed certain levels)
--- Quote ---*** should not be a problem. usually there is a filter in between to show subtitles, but with auto-load subtitles or with ffdshow dxva filter (don't use on intel GPUs from what I have tried) the subtitles can be placed in a different way.
Then again, with CoreAVC there is no restriction on * or ***, but ** should still apply.
--- End quote ---
Never saw video with filter in between, is that popular, or can i get sample of that kind of video?
lapa321:
Just got the u230 (YAY!) and it's running the Kanon 1080p demo at around 40-50% CPU. Zero stuttering. 100% smooth.
Haruhi Suzumiya 720p video runs at 20-30%.
However, when i try running the non standard videos (The Planet Earth 1080p Video), i'm getting the artifacts again. I CAN'T REMEMBER HOW I FIXED IT ON THE DESKTOP!!! Help please! I was randomly changing things on the desktop and it somehow got fixed, i don't know what i did!
I tried installing the new drivers but the catalyst icon isn't showing up in the taskbar so i'm not sure if it got updated!
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