[linux-dvb] Re: video + net with Nexus

["Augusto Cardoso" <augusto@carhil.net>]

Hi!

I may have miss the point here, however, I have run the skystar2 cards at 38Mbps IP payload speeds without dropping any packets for more than 24 hours. With the FCII/FCIIB the maximum speed that I got is about 41Mbps. With FCIII I have tested it at 78Mbps and simulated it at 120Mbps. (Note this tests were done at B2C2 with B2C2's drivers).
When I used to work at B2C2, we focus on data applications. That is the main reason the B2C2 Windows driver is a NDIS driver and the B2C2 Linux driver is a network driver. Unfortunately, the B2C2 drivers are proprietary and very cumbersome.

We did developed a software package for testing data in Unicast and Multicast. We also run the data in the same transponder that we run the video/audio. We tested receiving all IP data and video/audio without any problems.

I haven't done much data tests with the linuxtv.org drivers, mainly because my use is for video/audio MPEG2 data.

Can this be a latency issue in the driver? How are you testing? What type of applications/protocol? What's the service provider?

	Augusto

*********** REPLY SEPARATOR  ***********

On 12/19/2003 at 6:00 PM Ralph Metzler wrote:

>Steffen Barszus writes:
> > For me the crashes are gone, but you can sure forget to try dvb/ip over 
> > a nexus. I get data rates of 3-4 kB over the nexus and 120 over a 
> > skystar2. If this could be fixed it would sure be nice, but from 
> > current discussions i read that the card "is not designed to work" for 
> > this task and i have it understood, that this issue wont be fixed. 
>
>The 120 kB itself are not the problem. The provider is probably
>sending more than 10-15 Mbit over one PID. At that point the card will
>start losing data. Neither the internal hardware filters nor the
>software filters (only because the whole PID has to be moved over the
>dual-ported RAM in this case) will work properly.
>
>
>Ralph
>
>
>
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