[vdr] Digital Devices (Linux 4 Media) 4 port (8 tuner) octopus/Duoflex experiences

Füley István aironet at tigercomp.ro
Mon Nov 26 12:54:04 CET 2012


I'm not using such a card, but I use a multituner (4 tuner) VDR setup, 
and I really like this 8 tuner/1slot idea.
I have two major problems with my setup;
1. Using PCI cards I'm limited to a maximum of 5 tuners, and I also need 
to use a PCI gigabit network adapter, so I have 4 tuners. I had bad 
experiences with USB DVB-S2 adapters (random restarts, bad signal 
locking, etc).
2. My 4 tuners are not from the same manufacturer and/or model, so I 
have to use different driver modules for them. But all of my card's 
drivers has some issues. For example one of the cards can't lock on SR 
30k, I have to use 29999 in channels.conf. So, if I have a line in 
channels.conf, I'm not 100% sure, that ALL of my tuners will work on 
that channel. This leads to the conclusion, that for multituner setup is 
highly recomended to use ONLY one kind of card with the suitable driver.

In conlcuision I'm also interested, maybe someone can share some 
experiences with Duoflex modules. If they are reliable, having stable 
drivers, it could be an interesting solution for multituner setup.


On 2012.11.26. 11:13, Oliver Schinagl wrote:
> Hey VDR friends,
> I'm thinking of getting into the whole satellite thing (DVB-T user for
> now) and was searching for interesting DVB-S2 tuners. I found that the
> l4m octopus/duoflex-s2 a very interesting device. While expensive you
> can connect up to 8 tuners! to a single PCI-e 1x lane (Bandwith should
> be more then enough). While I know there is a octopus mini-pcie device,
> I heard that there where some PCB issues so decided on getting the PCI-e
> version.
> I have tried googling for some up to date linux! information but found
> very little. Are there any l4m/dd octopus/duoflex DVB-S2 (or even
> CAM/DVB-C/DVB-T) users here that can share their current (and past)
> experiences? The tuner (only 1 dualtuner board and the octopus) will set
> you back a good 200Euro so I want to be sure that the devices is
> properly supported.
> Thanks,
> Oliver
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> vdr at linuxtv.org
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