[mythtv-users] Raspberry PI as backend slave or tvheadend as tuner ?

[John Pilkington]

On 05/06/13 12:40, Doug Scoular (dscoular) wrote:
> Hi Michael,
>
> On 5/06/13 4:46 PM, "mythtv-users-request at mythtv.org"
> <mythtv-users-request at mythtv.org> wrote:
>
>> Could try upgrading the Aerial (or adding a Mast Head amplifier to the
>> existing aerial to obtain better signal quality.
>> Another option, rather than use a Raspbery Pi, purchase a Core2 Shand
>> System, there are plenty of low cost HP SFF Desktops available on ebay
>> that work excellently as a sbe. If configured to shutdown when not in
>> use, it wont cost you a fortune in power.
>>
>
> 	I already have a mast head amplifier and a heavily researched brand new
> aerial and quad shielded co-ax. The signal is still very marginal.
> Splitting or adding yet another amplifier just aren't options.
>
> 	Also, I'd really like to do this without spending any more money (I'm
> Scottish)Š and since I have a spare Raspberry Pi and aerial I thought I
> might be in with a chance.
>
> 	I think the only problem suggested, thus far, is the throughput of the
> Raspberry Pi's USB subsystem. Since USB 2.0 is supposed to push 480Mbps
> (60MBps). Most of the channels I record are Standard Definition (SD) but
> even considering a High Definition (HD) stream my highest ever rate
> (according to the system status screen) is 15006kbps which equates to
> 9.8Mbps; so I'm hopeful it could read the data from the DVB-T PlayTV via
> USB and write the stream to the NFS share via the Raspberry Pi's USB based
> ethernet and still have some USB headroom.
>
> 	I guess I'll just have to suck it and seeŠ unless anyone has tried it
> already and knows better.
>
> 	Cheers,
>
> 	Doug
>

I still don't understand this.  You claim that an exotic antenna system 
struggles to deliver but you're proposing to use a 'spare' antenna with 
the RPi.  It may be a fun project but otherwise it doesn't really add up.

Cheers,

John P