Op Wo, 23 juli, 2008 20:00, schreef Goga777:
several questions :)
I'll try to anwser them ;)
Nope. Max is 1080i@60Hz. And for normal viewing, 1080P is still a thing in the very long future (for your information, we just got HDTV since March) and it would be only be interesting for the HDDVD and BluRay movies.
I have an AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ with AMD Cool'n'Quiet enabled. Currently it runs on 1Ghz (because of the AMD Cool'n'Quiet) and vdr has a CPU load of 15% through 25%.
I ordered it online through Reel Germany. Ordered it Thursday, payed it the same day using IBAN information and UPS delivered it yesterday :)
Niels Wagenaar
On Wed, Jul 23, 2008 at 10:52:04PM +0400, Goga777 wrote:
may be you know - does Pentium 4 3 GHz will be enough ?
Even 300MHz are enough. The CPU load is not a load that depends on CPU speed. It depends mainly on the current state of the driver which transfers the video data from the CPU over PCI without using bursts. Autonomous DMA should be possible, but is not yet finished.
On Thu, Jul 24, 2008 at 05:30:46PM +0400, Goga777 wrote:
Yes, only the TS (or ES) is transfered. Since the Decypher aborts PCI bursts (I'm not sure if it is just a config setting to circumvent some PCI erratas in the first chip version or really a HW block to "fix" them...), you end up with about 12-15MByte/s transfer rate at most. So a typical 20Mbit/s stream produces about 16% "load" almost independent on the CPU speed.
There are DMA blocks in the chip, but the documentation is a bit ...er... weak....
what about post-processing, scaling quality ? is it good ? does only easiest bob deinterlace method support ?
what about support the different h264 profiles - PAFF + spatial direct mode, MBAFF (bottleneck of ffmpeg), CABAC, CAVLC does eHD support those profiles well ? which h264 level does support eHD ?
Goga
On Thu, Jul 24, 2008 at 05:43:55PM +0400, Goga777 wrote:
what about post-processing, scaling quality ? is it good ?
Depends on who you ask...
does only easiest bob deinterlace method support ?
There is simple scaling for 576i->1080i, ie. you see ghost lines, but there are no other artifacts. There's also Bob for interlace->progressive and (in the near future) blending for all modes. There is no motion compensation, although it was inofficially mentioned at the early stages of the chip...
what about support the different h264 profiles - PAFF + spatial direct mode, MBAFF (bottleneck of ffmpeg), CABAC, CAVLC
Is supported, there were never problems on BBC HD or so. For CABAC, the (official) input rate is about 25Mb/s, for CAVLC 50.
does eHD support those profiles well ? which h264 level does support eHD ?
H.264 Main Profile and High Profile at Level 4.
ah, it's very pity Motion compensation - is the best deinterlace method.... http://100fps.com/
thanks for your answers
Goga
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derblubber -
Georg Acher -
Goga777 -
Niels Wagenaar