Video playback on slow CPUs (like Atom)

What is the highest quality video that can be played back in real time on an Atom 230 or 330 entirely in software (i.e., without offloading any to the GPU like with VDPAU or similar)?
Put another way, what is the wimpiest (slowest, cheapest?) CPU that can decode 1080p H.264 in real time?
Basically, I'm trying to determine the viability of using one of the common "nettop" boxes with a 64-bit Atom and the crappy Intel 945GC chipset as a primary desktop. My most demanding usage watching an occasional fansub, usually in not-so-good quality. It'd be a shame to not be able to take advantage of such cheap, power-efficient hardware.

I do have Arch installed on D945GCLF2 with Atom 330 and so far it play 1080p video files without a problem using coreavc codec and mplayer from windows. There are few threads about how to compile mplayer with coreacv support at forums already. It's preety painfull for CPU, using all 4 (including HT) cores at around 60% but works. The only problem i have is with flash, for both low-quality and hd videos if i use full-screen mode (which scales it to 1920x1200), can't get over it so far.
Another solution would be to find some cheap nVidia PCI graphic card with VDPAU support, but my case is too small to even try that ;-)
Last edited by Arcain (2009-06-17 15:09:24)

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Slow video playback in Photoshop Elements 11

Playback of videos directly in Photoshop Elements Organizer is very slow. Video is stuttering.
Playing the same video outside of PSE11 with Windows Media Player is much better. Video plays without any stuttering.
Looks like the internal video player of PSE11 is very poor and provides slow performance.
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I use Windows 7 64 Bit (8 GB RAM) with a Intel Core i3 (2330). This CPU has enough power to playback HD or Full-HD videos without any stuttering!!!
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The videos I use are created with different devices.
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ZBOXHD-ID34BR-U
Assembly Configuration
All-in-one + Optical Drive (no OS)
CPU Integrated
Intel Atom D525 1.8 GHz Dual-Core
Chipset
Intel® NM10 Express
Cooler Type
Fan (Single Slot)
Onboard Video
Next Generation NVIDIA® ION™ (w/512MB DDR3 memory)
Onboard Audio
Onboard analog stereo high-definition audio/ 7.1-Channel LPCM digital audio (HDMI)/ Optical Digital S/PDIF audio output
Onboard LAN
10/100/1000Mbps, WiFi 802.11n/g/b
Memory Size
1 x 2GB Installed (Up to 2 x 2GB)
Memory Slots
2 x 200-pin SO-DIMM
Memory Type
DDR2 800 SO-DIMM
FSB
800 MHz
OS Name
Microsoft Windows 7 Home Premium
Version
6.1.7601 Service Pack 1 Build 7601
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Browser : Firefox 25.0.1

Can you say even more about what it is you want to do? I mean, what will the application do, not what are the technical aspects of how it will work?
For a point of comparison, look at this thing I did:
http://www.cartoonnetwork.com/mixit/
If you try out the Make page, both the template ones and the from scratch one, as well as the View page to see the playback unit in action. Is what you're going to do anything like that?
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I was having this same problem, and found one cause.
I have an extensive library on a Drobo FS. None of the AppleTV's in the house have any problem streaming full 1080p from it, but my new iMac does. Choppy / laggy video play. Movies and TV shows right from the iTunes store. I can have 3 TV's streaming, and even a 4th laptop, all streaming from the iMac iTunes using the Drobo. They all have zero issues. No lag, no choppy, nothing. iMac has the issue even when nothing else is running. Every time.
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But, as I said, I found the root cause in my case. I can turn off Timemachine backups while I'm watching a movie on the iMac, or I can move where I write the Timemachine backups to (going to try this over the weekend to be sure it works). If moving the Timemachine backup to a different drive doesn't work, it's a bigger problem.
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