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1080p not really work on htpc

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Old 07-31-2009, 06:04 AM   #1  
What is HD?
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Join Date: Jul 2009
Posts: 3
Default 1080p not really work on htpc

Hy i built an htpc at home.
The movies in 720p works fine, but in at 1080p the image are slow.
The problem is in video card, the cpu the chipset?
My pc is like that: AMD dual core 4400+, with 2 G ram, video Shapire ati radeon x1650 pro 512, MB biostar am2 . The connection with tv (1080p LG) is dvi to hdmi, and audio spdif to yahama receiver.
So the cpu is not powerfull or videocard?
I should change MB with cpu or just the video card?
Share from your experience.
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Old 07-31-2009, 07:02 AM   #2  
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Location: Katy, Texas
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My experience is with a 3.0 GHz dual core Intel processor with an nVIDIA 7600GS video card. On another HTPC it is a 3.4 Ghz hyperthread Intel processor with an nVIDIA 8500GT video card. They both will play Blu-ray from an internal drive at 1080p just fine using PowerDVD.

I don't do those "so called" 1080p downloads because most of them are crap files. The codecs vary all over the place and use different containers so you have to have a lot of filters and codecs loaded to handle them.

Are the files you are trying to play from downloads? If so we have some members here that know about playing that stuff and perhaps they will chime in.
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Old 07-31-2009, 07:28 AM   #3  
What is HD?
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yes i did download 1080p movies(1920x800 res) in mkv format. I play with kmplayer like all the other files 720(1280x720). i dodnt have any problems with 720p files but the 1080p files are slow. I will see.
Thanks for the response
Cheers from Canada
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Old 08-01-2009, 11:24 AM   #4  
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Your graphics card is fine for HD video. The x1650 has AVIVO capabilities, so it can perform hardware acceleration for HD movies to reduce CPU usage. If you WERE going to upgrade anything, it would be the CPU.

When you play .mkv files downloaded from the internet, chances are you are playing them with the ffdshow or coreavc video codecs. These are "software" codecs, and do not take use of any hardware acceleration capabilities form the graphics card. This means the CPU is trying to do all the work and your GPU is sitting on its ass and handing off the rendered product to your TV/Monitor. Your 4400+ will not be able to handle 1080p if it is doing all of the work.

In order for you to use hardware acceleration (in windows its called DxVA - direct x video acceleration) and make your graphics card share show of the workload, you must meet some requirements.
- The player you are using to play the video files must use a codec with DxVA capabilities
- The FILE you are playing must be encoded within the score to allow this. HD MKV files encoded with a profile higher than [email protected] will not work. If you are downloading mkv files from torrent sites, chances are a lot of them are not compatible.

Some useful tools for you:
- Mediainfo: this program will tell you information about ANY media file. You can see what format the video is in, regardless of the container, and also the frame rate, profile, bitrate, etc...
- Media Player Classic Home Cinema: this is a free video player that, if you want, you can download the standalone version will all of its codecs built in. Follow the steps on the site for enabling DxVA hardware acceleration and you should see your 1080p movies start working if they are encoded properly.

I think this should be sufficient information to set you on the right track to get you what you want. There are plenty of posts on other forums regarding this topic. Just so you know, if you were to plop a BluRay drive into your system and try playing BluRay discs with the included software (PowerDVD), you won't have any problems. Your computer can play BluRays easily because all BluRays undergo format restrictions, and the PowerDVD software is setup to handle hardware accel. BD-ROM drives might be as cheap as $60 or $70 now. I Netflix BluRays and play them on my HTPC.
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Old 08-05-2009, 09:17 AM   #5  
What is HD?
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Thank for the answers. With media player home cinema, is working fine 1080p. In the first time it was not working, but after couple searches on the net, i found that you should have the latesc direct x instaled on PC.
it preety coll this media player home cinema.I use the internal filter for video, and for audio spdif, ac3 filter. Is 20% CPU load, and the image crispy.
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