[mythtv-users] OT: XBMC on Apple TV2 and iPad
belcampo at zonnet.nl
Fri Jan 21 22:45:49 UTC 2011
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:
>> > 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
>> 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.
> mythtv-users mailing list
> mythtv-users at mythtv.org
More information about the mythtv-users