[mythtv-users] OT: XBMC on Apple TV2 and iPad

[belcampo]

Raymond Wagner wrote:
> On 1/21/2011 15:41, Matt Emmott wrote:
>> On Fri, Jan 21, 2011 at 2:59 PM, Tom Bongiorno <tom at bongohut.com 
>> <mailto:tom at bongohut.com>> wrote:
>>
>>     On Fri, Jan 21, 2011 at 2:54 PM, Matt Emmott <memmott at gmail.com
>>     <mailto:memmott at gmail.com>> wrote:
>>
>>     > On Fri, Jan 21, 2011 at 2:13 PM, Richard Morton
>>     <richard.e.morton at gmail.com <mailto:richard.e.morton at gmail.com>>
>>     > wrote:
>>     >>
>>     
>> http://xbmc.org/theuni/2011/01/20/you-asked-for-it-xbmc-for-appletv2-ipad- 
>>
>>     
>> <http://xbmc.org/theuni/2011/01/20/you-asked-for-it-xbmc-for-appletv2-ipad-iphone4/>iphone4/ 
>>
>>     >
>>     > Holy crap, this changes everything. Full XBMC on all the
>>     devices? My head
>>     > just exploded.
>>
>>     This changes everything for what?  MythTV?  XBMC only supports up to
>>     MythTV 0.23.  Also, what would we be giving up using an XBMC 
>> frontend?
>>
>>
>> It changes everything in that, you now have a small portable device 
>> with a great front end to all your media.
> 
> This changes nothing, yet.  The published performance specs for the A4 
> chip are hardware accelerated h.264 up to Main Level 3.1.  No MPEG2, so 
> that cuts out the bulk of digital TV.  No h.264 Level 4.1, so that cuts 
> out the rest of digital TV and output from an HDPVR.  Lack of that, and 
> VC1, means no Bluray playback either.  From the published information on 
> the chip, it's still garbage requiring any content be transcoded down to 
> low quality specifically for that device.
Not LowQuality, but the same quality at a 'little higher' bitrate.
Main3.1 is as good as High3.1 with the same crf or qp settings.
Bitrate is NOT = QUALITY
Better encoder produces same quality in less bits.
I've done several BluRay encodings with qp=24, between 16 - 26, most 
people perceive this setting 'almost as good' as the original. Resulting 
bitrates drop from 32-38Mb/s to 3-7Mb/s on average.
> 
> Now the A4 uses the same graphics chip as the GMA500, which is fully 
> capable of Bluray playback, and the fact that they were even able to 
> feed a 1080p video into it means Apple is intentionally restricting the 
> capabilities of the hardware.  The XBMC guys are intentionally not 
> saying anything about the capabilities of the device, until they get the 
> code cleaned up and stabilized.  The user comments are all fairly 
> unenlightened.  Between the several dozen forum topics, and comments on 
> multiple news entries, I saw all of three posts that realized that there 
> are differences in requirements between one 1080p video and another.
> 
> The discovery and implementation of a hidden video API available for iOS 
> and OSX is certainly an impressive, and likely useful, accomplishment, 
> but hold off applause on the ATV2 until someone actually documents what 
> the device is capable of.
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