[mythtv-users] Digital Devices Duoflex with Octopus CI

[Mike Perkins]

On 27/07/16 14:39, Hika van den Hoven wrote:
> Hoi Discussion,
>
>  Earlier this week I received my new DD duoflex C2/T2 with a Octopus
>  single CI+. I got it setup without to much difficulty, although proper
>  documentation is a bit lacking. I had to gather it from all over the
>  net.
>  http://www.digital-devices.eu/shop/de/linux-treiber
>  https://www.linuxtv.org/wiki/index.php/Digital_Devices_DuoFlex_C%26T
>  and some others. I used the dddvb driver as in the first link.
>  The kernel driver is not supporting all DD devices and you need
>  a separate driver that seems to work OK AND a not so good documented
>  option needs to be added on loading the ddbridge module:
>  adapter_alloc=3, although dd mentions fmode=3.  From what I have
>  found it has to do with unicable, any way without it both tuner and
>  the CI get their own /dev/dvb/adapter* directory and besides them
>  not being able to communicate with each other, making the CI+
>  unusable, MythTV gets unstable. It has the following possible
>  settings:
>  0: adapter0, adapter1 and adapter2
>  1: adapter0 with both frontends, adapter1 with CI+
>  2: adapter0 with both frontends, adapter2 with CI+
>  3: single adapter0 directory with both frontends and CI+
>  Any other integer gives option 2, no option gives 0.
>  Both frontends have a frontend,demux, dvr and net node
>  The CI+ has a ca0 and a ci0 node.
>
>  You should be able to switch the frontends between Cable and
>  Terrestrial mode, but I have not found how, but as they at present
>  are in Cable modus as I need them, that is no urgent problem.
>
>  If you leave it at that they work good and all channels are found,
>  however not with the CI+ although it seems to have to work almost
>  transparent and I found some vague mentioning that some got it
>  working with one tuner under MythTV and a little less vague with
>  TVheadend.
>
>  It should work by redirecting the output from one of the tuners to
>  the CI+ port and it should be transparent. (In windows you can use
>  the CI+ with both tuners, but not under Linux) In my case through:
>
>  echo "00 02" > /sys/class/ddbridge/ddbridge0/redirect
>  echo "01 02" > /sys/class/ddbridge/ddbridge0/redirect
>
>  before Mythbackend is started for either the first or the second
>  tuner as described in the second link.
>  I guess I have to disable multirec for that tuner.
>
>  If I do this that tuner becomes completely blind. I can not find any
>  channels anymore, (but I can through the other) and I can not get any
>  output. The CAM is OK as it works in my TV. If I try to watch liveTV
>  through that tuner I get a black screen and I see no errors in the
>  log. At one time the backend even kind of froze. I could not stop it
>  even with kill and when I rebooted the machine it hung.
>
>  Anybody any thoughts?
>
A minor thought. You could put the CI port in an "Input Group" with a tuner, which means that both 
are considered part of the same input and would not be used simultaneously - like some of the cards 
which have both digital and analog tuners. I'm not sure you can do this and use /both/ tuners 
though, but either alone should work like that.

I don't think you'd be able to use multirec with a CI card but without knowledge of the specific 
hardware I couldn't say. The bare tuners, yes, you should be able to assuming the multiplexes 
conform to some reasonable standard.

-- 

Mike Perkins