[mythtv-users] More than one backend?

Mitch Gore mitchell.gore at gmail.com
Mon Apr 16 19:31:31 UTC 2007

Slave backends are basically a full blown backend except they share the
database from the main backend.  This allows you to add more tuners to the
entire system.  It works quite well.

But i do notice some issues with you install/list of parts.

The backend you described with the 1.8ghz will be fine for hardware encoding
cards and digital TV recording.  But putting a frame grabber on the system
is going to really tax it if its doing other things such as commflagger,
transcoding or recording multiple shows.  I dont understand why you really
want this?  I am not familar with this Adaptec card but before you buy make
sure it is supported on linux.  The PVR-150,350,500 are by far the most
common tuners and therefor have much more support.

Also an Athlong 2000+ pry wont handle HDTV/DT shows.  Plan on atleast
3.ghzthe more the better.  You may get by with the 2000+ if you use
XvMC with a
Nvidia card but it may have some frame bufer problems.


On 4/16/07, Rob Beard <rob at esdelle.co.uk> wrote:
> Hi folks,
> I was hoping someone could help a MythTV newbie with a query about
> multiple back ends?
> In the next couple of days I am having a satellite dish with Quad LNB
> and new digital aerial installed.  Now I have been planning on setting
> up a MythTV box to record from digital free to air satellite and digital
> terrestrial TV.
> My original idea was to have a combined front end and back end to handle
> recording and playback.  I was also hoping to fit an Adaptec PCI MPEG2
> encoder card (same sort of thing as the Hauppage PVR-250 I think) and
> also a standard BT878 TV capture card to handle capture from video (to
> transfer all those old video tapes to DVD).
> To run all this I was thinking of using an Athlon 64 3000+ with a Serial
> ATA hard drive, 512MB (or possibly 1GB) memory under Ubuntu 7.04 (when
> it is released).
> On reading through the Ubuntu Edgy MythTV documentation noticed it
> mentions slave back ends.  This got me thinking, would it be possible to
> have a main back end system based on something a bit lower spec like a
> Pentium 4 1.8GHz, 512MB memory and the DVB-T and DVB-S cards to live TV
> and scheduled recording and then have a combined front end/slave back
> end system downstairs plugged into the main TV based on something like
> an Athlon XP 2000+ with 512MB memory to playback recordings, view live
> TV and also record/view video from the MPEG2 encoder card and BT878 TV
> card?
> Is anyone else using multiple back ends with one (or many) front ends?
> Thanks in advance.
> Ta,
> Rob
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