[mythtv-users] Raspberry Pi as a slave backend server

[Bert Haskins]

On 3/21/2015 4:09 PM, jrh wrote:
>
>> On Mar 21, 2015, at 12:56 PM, Dave MythTV <dave.mythtv at gmail.com 
>> <mailto:dave.mythtv at gmail.com>> wrote:
>>
>>
>>
>> On Fri, Mar 6, 2015 at 8:22 PM, jrh <jharbestonus at gmail.com 
>> <mailto:jharbestonus at gmail.com>> wrote:
>>
>>     I have experimented some using the raspberry pi as a slave
>>     backend server and have had generally good results with caveats.
>>
>>     Configuration:
>>     Raspberry Pi Slave backends running v 27.4(dated in November)
>>     NFS mount to the Master backend for the mythtv directories.
>>     Hauppauge USB HVR-950Q tuner(1 only ) (configured only 1 virtual
>>     tuner so only 1 recording)
>>     I did not configure the analog side of the tuner, only the
>>     digital part.
>>
>>     Using a Raspberry Pi model B and B+:
>>
>>     Able to record Standard Definition mpg video stream.
>>     When attempting to record 720p or 1080i streams, there would
>>     consistently be TFW taking to long errors.
>>
>>     Using a Raspberry Pi 2 model B: (the quad core version)
>>
>>     Able to record Standard Definition mpg video stream
>>     Able to record both 720p and 1080i streams up to 15mbps!
>>
>>     In summary, for 1 stream and a USB TV stick The RPi 2 is a viable
>>     masterbackend with the above conditions. I didn’t try multiple
>>     streams off the same real channel, but I suspicion the Pi 2 would
>>     be able to handle it.
>>
>>     Note that I did not try analog recording as there are no analog
>>     NTSC Over the air broadcast stations in the area and so I didn’t
>>     even try to configure the analog side.
>>
>>
>>
>>
>> Thanks for sharing this information!
>>
>> A few quick questions for you:
>> 1) Which Linux distribution are you using?
>> 2) I'm assuming this testing was with a wired network (and not a USB 
>> wireless adapter)?
>> 3) Do you have any thoughts on the source of the TFW errors on the Pi 
>> 1?  Such as, whether the TFW errors with the Pi 1 were related to the 
>> CPU loading, pushing the data out across the network, or a limitation 
>> of the USB system?  (Since it kept up OK with standard definition 
>> streams, I'm wondering if the Pi 1 might be sufficient as a 
>> high-definition slave backend if it recorded directly to a small 
>> local USB hard drive, or even to its own SD card, and then did a 
>> non-realtime NFS data transfer back to the master backend when the 
>> tuner was idle?)
>>
>>
>> Keep us posted on how things go if you try multiple streams or 
>> multiple tuners on the Pi 2!
>>
>> Thanks
>> - Dave
>>
>
> I am using raspbian off the noobs image.
>
> You are correct, I just used wired network. I didn’t even want to try 
> going wireless.
>
> I didn’t even try experimenting using a local usb drive as that 
> wouldn’t fit my usage scenario, so are still all good questions.
>
> I will be staying with a single USB tuner for my needs, and Since I 
> started using the RPi 2 configured as above, I have had no TFW errors 
> since starting to use it!
>
> I have no plans whatsoever to try to use an RPi of any kind as a 
> frontend, however, they are very insteresting as a remote backend like 
> I am using. The pi 2 plus the hauppauge USB tuner are only using 
> around 7 watts while recording!
>
> By the Way, I noticed I goofed above when I said it was a viable 
> master backend. I meant to say it is a viable SLAVE backend.
>
> An experiment I might try sometime in the future is to have an RPi as 
> a masterbackend ONLY with no tuners(just define a dummy recorder). No 
> immediate plans to try that tho yet.
>
> Regards
Has anyone managed to get mythweb running on the Pi?
>
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://lists.mythtv.org/mailman/listinfo/mythtv-users
> http://wiki.mythtv.org/Mailing_List_etiquette
> MythTV Forums: https://forum.mythtv.org

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mythtv.org/pipermail/mythtv-users/attachments/20150321/570f0dbb/attachment.html>