[linux-dvb] Re: Why no more than 3 PID filters

["Valsecchi Patrick" <patrick.valsecchi@nagra.com>]

Hi,

I've been using up to 32 filters successfully.

I've witnessed troubles after 8 filters with a full featured card.
But that can be fixed by setting the hw_sections parameter to 0
when loading the dvb_ttpci module.

Try that, it may solve your problems.

Have a nice day.

Patrick

> -----Original Message-----
> From: linux-dvb-bounce@linuxtv.org
> [mailto:linux-dvb-bounce@linuxtv.org]On Behalf Of Delaunay Christophe
> Sent: Tuesday, January 11, 2005 3:16 PM
> To: linux-dvb@linuxtv.org
> Subject: [linux-dvb] Why no more than 3 PID filters
> 
> 
> Hi all, a happy new year and many thanks to those who helped 
> me in letting my Nexus-S card run on my mandrake 10.0 box.
> 
> I finally could figure out that I could not make it work 
> because the "firmware_class" module was not loaded when I 
> tried to load the appropriate other modules for the nexus-S card.
> 
> Now, the scan and szap utilities work just fine. However, I 
> want to use the card which a special network player which 
> needs to receive full mpeg2 TS packets in order to be able to 
> decode the stream properly. In a minimal TS, I need at least 
> four PIDs as follows :
> 
> 	- At least one video PID ;
> 
> 	- At least one audio PID ;
> 
> 	- The PAT of the stream the card is tuned to ;
> 
> 	- The PMT of the service I want to play.
> 
> Since I wanted to play several services from the same 
> transport stream to different socket, I tried to use 
> "dmx_pes_filter"s, (one per PID I want to play).
> 
> For the three first filters I open, anything seems to work 
> right but the problem occurs when I try to open a fourth filter.
> 
> When I call "fd = open("/dev/dvb/adapter0/demux0", O_RDRW)", 
> the "fd" variable is set with a valid file descriptor.
> 
> Then, I initialize a "dmx_pes_filter_params" structure called 
> "pesfilter" and call "ioctl(fd, DMX_SET_PES_FILTER, 
> &pesfilter)", I receive a value which is different from -1 so 
> I suspect that the call is correct.
> 
> However, when I further want to read from "fd" into a buffer, 
> I always receive the "Bad file descriptor" error.
> 
> What happens please ? Is the demux file descriptor prematurly 
> closed and why ?
> 
> Many thanks in advance for any help. Have a nice day. Chris
> 
> 
>