On Thu, Jul 24, 2008 at 05:30:46PM +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. > > do you mean the transfer of compressed (h264 or mpeg2) video data from dvb > card to eHD ?
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.... -- Georg Acher, [EMAIL PROTECTED] http://www.lrr.in.tum.de/~acher "Oh no, not again !" The bowl of petunias _______________________________________________ vdr mailing list email@example.com http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr