[mythtv-users] OT: DVB-T2 projects UK based

John Pilkington J.Pilk at tesco.net
Wed May 11 12:25:04 UTC 2011


On 11/05/11 12:18, David Watkins wrote:
>> what's the spec of the system you're testing on?
>> I want to help but am concerned that my little FE/SBE system may not be
>> powerful enough to cope with HD.
>> Its an AOPEN MP45-DR with Intel P8400 2.26Gz and GM45GPU
>
> I'm using a Zotac ION based system running Fedora FC14.
>
> At the moment I'm just trying to capture a recording and, as I
> understand things, system performance isn't an issue for that.
>
> If and when I manage to get something recorded I'll start worrying
> about being able to play it :-)
>
>> This all looks quite promising.  I'd be happy to start some testing on some
>> spare hardware I have, my frontend is an Acer Revo which copes with HD
>> admirably, and my backend is a good quad-core system.  How hard is it to
>> build the drivers and keep the system up-to date?
>
> Building the drivers wasn't hard because the script provided here
>
> http://git.linuxtv.org/media_build.git
>
> does it all.
>
> I had to install the kernel-devel package which meant kernel and
> nvidia updates.  The script then asked for a couple of other packages
> and a perl module to be installed.  Probably pretty straightforward if
> you know what you're doing, but it took me a while to figure out.
>
> The script builds loads of stuff as well as the cxd2820r driver, and
> took a while.
>
> #make install
>
> to install the drivers and, on a reboot the cxd2820r was automatically loaded.
>
> I'm running MythTv 0.24 fixes from a couple of weeks ago which I
> compiled myself, but wondering if I should be running trunk?
>
> In MythTV setup the 290e is detected both as a DVB device and as a V4L
> device.  I chose DVB.
>
> I went through the rest of the setup and did a channel scan which
> found 65 DVB channels and 2 MPEG channels.  I don't remember seeing
> MPEG channels before (could these be HD channels?)
>
> I downloaded some listing data from tv_grab_uk_rt. The DVB channels
> had callsigns and channel information in the database from the channel
> scan, the other two channels didn't so I fudged listing data for them
> copied from other channels.
>
> I started a frontend to tried and set up a recording...which is where
> things started to go wrong :-(
>
> I couldn't get a successful recording on any channel (I didn't try
> them all but I tried a few).  The frontend displayed the recordings as
> "being tuned" rather than "being recorded".  At first glance the
> backend log looked OK, with a "Started Recording" message, and no
> errors.
>
>
> Now it might just be I have a poor signal.  I'm using the little
> spring thing that came with the USB tuner for the aerial.  I'll move
> my test system tonight and plug it into my roof aerial.
>
> Otherwise I'm going to:
>
> 1)    Try the V4L option on the capture card setup.
> 2)    Enable more detailed logging on the backend
> 3)    Look up the transmitter parameters for Crystal Palace and look
> at the Transport settings in the database.
> 4)    Fiddle with the tuning parameters in mythtv-setup
> 5)    Do some more Googling
>
> Experience from others would definitely be useful.
>
> D

I would give priority to using the roof aerial, unless you're in the 
same postcode as Crystal Palace.  Your other box should have good 
starting transport parameters, and setup has a 'look for other 
transports' setting.  Good luck.

John P



More information about the mythtv-users mailing list