Op Ma, 24 november, 2008 16:50, schreef VDR User:
Only, in the US most of the HDTV transports don't use H264. At least, I heard from several people that it's HDTV through MPEG2. Over here (Europe) it's mostly HDTV through H264 (only a very small number of MPEG2 HDTV channels over here).
And H264 is the real problem over here and it all comes down to CPU decoding (FFMpeg or CoreAVC for Linux) or by using a device like the Reel HD Extension.
Currently I need to use a Core 2 Quad (Q6600 @ 2.40GHz) to get decent and stutter-free H264 decoding using software (FFMpeg SVN, Xine-lib 1.2, Xine-UI and vdr-xine plugin). With my Core 2 Duo (E7300 @ 2.53Ghz) I didn't had enough juice (stuttering, framedrops, etc).
That's why I do enjoy all this news about hardware accelerated H264 decoding on the GPU. Most of the motherboards have a GPU with this kind of features, to bad we can't use it in Linux/Xorg :(
Regards,
Niels Wagenaar
On Mon, Nov 24, 2008 at 8:05 AM, Niels Wagenaar n.wagenaar@xs4all.nl wrote:
You've been given bad information. There are _some_ HDTV channels broadcast in mpeg2 but most are h264.
You absolutely do not need a quad-core CPU and your Core 2 Duo should easily handle h264 decoding. I'd say something was misconfigured or so.
Btw, I use CoreAVC here and the cpu usage doesn't go above about 87% on that x2 4400. The h264 implimentation in ffmpeg was very unstable when I tried it although I heard it's gotten much better.
VDR User a écrit :
It's still good news to know that open-source software allowing current fanless integrated motherboards to decode HDTV at ~10% CPU is on its way...
Going from 87% of 2 cores, to ~10% of an entry level CPU is good, specially when the load is taken care of by existing chips. I'd like to have full-HDTV on a single x86 mini-ITX board. I'm now seeing this will happen soon enough, and I'll wait until then before I spend money on new hardware.
On Mon, Nov 24, 2008 at 9:46 AM, Nicolas Huillard nicolas@huillard.net wrote:
Yes, I agree. Just pointing out that you certainly do not need a quad core, that's all. Also, the price of the cpu is the same whether you're using 87% or 10% of it. ;) The point is you can already have cheap HDTV without using the new Nvidia api.
Yes it's nice! My goal is diskless, fanless, low power consumption dedicated HDTV box. Very small, very low cost!
Hi,
On Mon, Nov 24, 2008 at 08:43:14AM -0800, VDR User wrote:
And what resolution?
720p ?
I have no problems in decoding 720p, but 1080i is a bit more difficult to decode. I have also tried out CoreAVC, but ffmpeg worked better for me.
Regards, Artem
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Artem Makhutov -
Nicolas Huillard -
Niels Wagenaar -
VDR User