Quicktime X Airplay

PhazonUK

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Original poster
Jun 1, 2010
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Am I right in saying that Apple mentioned that 10.8 would bring Airplay to Quicktime X in a similar way that iTunes currently has it?

And if so, would that mean that I could play, for example, an AVI file in QTX using Perian and then Airplay that to my ATV? Or will it still have to be MP4 for that to work?
 

pdjudd

macrumors 601
Jun 19, 2007
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Plymouth, MN
I don’t recall Apple saying anything about Quicktime X - there is certainly nothing about such a feature on their website. They did announce Airplay screen mirroring which broadcasts your entire desktop onto a TV with Apple TV but that isn’t what you are looking for.
 

PhazonUK

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Jun 1, 2010
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I seem to remember them mentioning it when they first unveiled ML, and I also found it mentioned here.

But as you say, there is no mention of it from Apple and I haven't heard anything about it at WWDC.
 

pdjudd

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Jun 19, 2007
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even if it is "just mirroring" that includes video and audio. So technically yes it would include QT in a roundabout way.
In some way yes - I do wonder how optimized video will be when you have to include the whole desktop. We shall see when it rolls out fully I suppose.
 

Mr. Retrofire

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Mar 2, 2010
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And if so, would that mean that I could play, for example, an AVI file in QTX using Perian and then Airplay that to my ATV? Or will it still have to be MP4 for that to work?
Perian uses the "old" QT-API (not the new Mountain Lion QT-API), so i'm not sure that ML AirPlay supports Perian-decoded content. However, AirPlay encodes decoded QT-content (QuickTime X, iTunes and so on) in realtime via Intels Quick Sync hardware unit, so the source (decoded picture source) should not matter.

AnandTech said:
Source: http://www.anandtech.com/show/5771/the-intel-ivy-bridge-core-i7-3770k-review/21
Intel's latest drivers now allow for a selectable tradeoff between image quality and performance when transcoding using Quick Sync. The option is exposed in Media Espresso and ultimately corresponds to an increase in average bitrate. To test image quality and performance, I took the last Harry Potter Blu-ray, stripped it of its DRM and used Media Espresso to make it playable on an iPad 2 (1024 x 768 preset).

In the case of our Harry Potter transcode, selecting the Better Quality option increased average bitrate from to 3.86Mbps to 5.83Mbps. The resulting file size for the entire movie increased from 3.78GB to 5.71GB. Both options produced a good quality transcode, picking one over the other really depends on how much time (and space) you have as well as the screen size of the device you'll be watching it on. For most phone/tablet use I'd say the faster performing option is ideal.
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If we rely on software decoding but use Intel's hardware encode engine, Ivy Bridge is 18% faster than Sandy Bridge in this test (1080p 13Mbps output from BD source, same as above). If we turn on both hardware decode and encode, the advantage grows to 29%. More than half of the performance advantage in this case is due to the faster decode engine on Ivy Bridge.
 

gentlefury

macrumors 68030
Jul 21, 2011
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Los Angeles, CA
In some way yes - I do wonder how optimized video will be when you have to include the whole desktop. We shall see when it rolls out fully I suppose.
I have a program called Air Parrot and it lets you airplay your desktop to your Apple TV and it plays video quite well. A native implementation should technically be even better. They are bragging that you can use it to stream games to the screen.....so it has to be good...since control latency would be a major issue otherwise.
 
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