On Mon, 14 Feb 2005, Brian Foddy wrote:
On Monday 14 February 2005 05:08 am, Cory Papenfuss wrote:OK... that's one rippin' P3 system. I've got a dual 933 PII that I was maybe hoping to use with HD. Just out of curiosity, how much (%cpu) is used for:Unfortunately, my little-old P3 can just barely do HD with XvMC, that's why I need it; otherwise I'd try and live without it.
Brian
So a P3 is capable of doing HD if you're using XvMC? I thought that even with XvMC it took a beefy machine. How fast of a P3 are you using? How much of an (NVidia) card is needed to make XvMC go reasonably?
Thanks -Cory
I run a P3-1400 Tulatin (slightly more cache than normal). The machine has 4 tuner cards, 3-PVR250's and 1 Air2pc. 768MB ram, Nvidia 5600, 4 SCSI (10K, 80MB/sec) disks in software raid 0. It is able to record all 4 streams and play the HD stream at the same time (frontend/backend). CPU load runs about 70-80%. In general, it will not skip frames, but its not out of the question. Any fast forward or something will cause about 5 seconds of frame skipping while it catches up on its cache.
backend
frontend
X
.... that determines how well dual CPU will help. My experience has been pretty good with mythtv on duals. I used an old BP6 (Dual celeron 300->450) with a software card that was useable at 352x480 capture size. The capture (mythbackend) itself took 95% of one cpu, but playback was split between frontend and X and only burned up about 60% of the other.
-Cory
************************************************************************* * Cory Papenfuss * * Electrical Engineering candidate Ph.D. graduate student * * Virginia Polytechnic Institute and State University * *************************************************************************
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