[mythtv-users] Latest thoughts on small silent frontends

[Greg Thompson]

On Mar 9, 2014, at 9:24 AM, Stephen Worthington <stephen_agent at jsw.gen.nz> wrote:

> On Sun, 9 Mar 2014 08:42:51 -0400, you wrote:
> 
>> 
>> 
>>> On Mar 9, 2014, at 8:29 AM, Stephen Worthington <stephen_agent at jsw.gen.nz> wrote:
>>> 
>>>> On Sat, 8 Mar 2014 18:30:47 -0500, you wrote:
>>>> 
>>>> 
>>>>> On Mar 8, 2014, at 4:30 PM, Chris Lewis <chrislewis915 at gmail.com> wrote:
>>>>> 
>>>>> Hi
>>>>> 
>>>>> I'm about to dedicate my current combined BE/FE to being a BE only. I want to add a couple of dedicated frontends to the system.
>>>>> 
>>>>> So what are the options for small cheap silent hd capable devices?
>>>>> 
>>>>> Has any work been done on getting the raspberry pi to work? Or some other arm based system?
>>>>> 
>>>>> If not what's best at the moment
>>>>> 
>>>>> Chris
>>>> I have 3 of these and they work great. 
>>>> 
>>>> http://www.asus.com/EeeBox_PCs/EeeBox_PC_EB1033/
>>>> 
>>>> Greg Thompson
>>> 
>>> I would have thought that the Nvidia 610 in one of those was not
>>> sufficiently capable of doing 1080i.  I know that when I got my Nvidia
>>> 220, Nvidia 210s were not able to do 1080i properly, and I thought
>>> that same pattern of the cheapest chip(s) in the range not being able
>>> to do proper deinterlacing of HD continued through all the subsequent
>>> generations of Nvidia chips.  Most video hardware options now will
>>> handle 1080p and all the non-interlaced formats just fine.  But for
>>> 1080i HD you need something capable of doing advanced 2x
>>> deinterlacing, and that seems to need more (or better) shaders than
>>> you get in the lowest Nvidia chips.  If the main CPU can handle the
>>> deinterlacing, or you can get your TV to do it, then it would work
>>> fine.  But an Atom CPU is not that capable.  So I think at least an
>>> Nvidia 630 is what is required.
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>> It handles all the interlacing options at 1080p just fine. 
> 
> Yes, that is exactly what I said - a 610 will do progressive modes
> just fine.  Progressive modes such as 1080p are not interlaced.  So
> progressive modes do not use lots of the hardware in an Nvidia
> chipset, as they are easy to display, despite having higher bandwidth
> than the matching interlaced display.  It is the deinterlacing that is
> the problem.  My understanding is that the deinterlacing is done
> (under driver control?) using the shader hardware.  The shader
> hardware is not used for progressive video output.  And on a 610,
> there is not sufficient shader hardware to do the advanced 2x
> deinterlacing that is needed for a fully smooth 1080i HD display.
> 
>> See card status on this page. 
>> https://github.com/OpenELEC/OpenELEC.tv.git
> 
> I could not find any card status on that page.
> 
>> 
>> Greg Thompson
> 
> Perhaps you do not record any 1080i programs, so you never have met
> the deinterlacing problems?  There are places in the world where 1080i
> is not used.
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Sorry I meant to say I can run 1080i with advanced 2x de-interlacing with no issues whatsoever…

No hiccups, just buttery smooth all the time.

Greg

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