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AppleDApp

macrumors 68020
Jun 21, 2011
2,413
45
Apple has just demoed a new AirPlay Mirroring feature that can be used to easily push 1080p content wirelessly to your TV from your Mac running the upcoming OS X Mountain Lion. This means no more fiddling with an HDMI cable to get the same result. Audio can also be mirrored this way to AirPlay-enabled stereo systems and speakers.

Correct me if I'm wrong. So you still need the computer in near the TV? seems like a pain for Apple Desktops.
 

GermanyChris

macrumors 601
Jul 3, 2011
4,185
5
Here
Correct me if I'm wrong. So you still need the computer in near the TV? seems like a pain for Apple Desktops.

I don't know? I was thinking it'd be cool to keep it on the couch and stream to the TV in the living room, In my case thats about 8'. The really cool implementation would be Mac Mini streamin wirelessly to the TV from the wireless connection to the NAS. You could put the mini on the shelf and just connect the power cable. :D
 

AlanShutko

macrumors 6502a
Jun 2, 2008
804
214
I laughing know do you know how much computational effort need to encode AVC Intra 1080 which i edit every day and you tell me about ultra high compressed amateur h.264 probably you don't know.

For AirPlay, you WANT ultra-compressed h.264 because you are probably sending it over a wireless network to a device with hardware h.264 decoding. You would not be using an intermediate codec at a nominal 50 Mbit/s.

So yes, it does take more computation to get a good looking 1Mb/s stream than a 50Mb/s stream.
 

iThinkergoiMac

macrumors 68030
Jan 20, 2010
2,664
5
Terra
And second two posts later I said that I wasn't talking about 1080p but was going to try anyway. You folks are the one insisting on 1080.

You'd have to be able to transcode h.264 1080p faster than realtime in order to make Airplay work, which is why we're insisting on 1080p. In addition, you'd have to be able to do so with extremely little impact on the speed of the computer in doing other tasks.

I just did 720p downloaded from You Tube with kigo 2:35 video 46 seconds to MP4 but it was webm..

What's kigo? MP4 doesn't matter since h.264 is the format Airplay uses. If you're going to do a test, use the same format...

Hack=Hackintosh

I'm supposed to know this how?

Airplay won't work on anything less than the H67 chipset which dates from Jan 2011

You need to research this stuff.

Why do you think I don't know this? I've given you plenty of evidence I do.
 

AppleDApp

macrumors 68020
Jun 21, 2011
2,413
45
I don't know? I was thinking it'd be cool to keep it on the couch and stream to the TV in the living room, In my case thats about 8'. The really cool implementation would be Mac Mini streamin wirelessly to the TV from the wireless connection to the NAS. You could put the mini on the shelf and just connect the power cable. :D

In my case my imac and tv are no where near each other.
 

JohnDoe98

macrumors 68020
May 1, 2009
2,488
99
AirPlay mirror really needs the fastest hardware possible. Think about it, it requires encoding a video stream, transmitting the stream through the network, and finally decoding the stream and sending it to the TV.

Not quite. It has to encode and send it through the network, but the Apple TV will do the decoding of the encoded stream, just like it works when you currently airplay a video through iTunes. It just sends the video and the Apple TV decodes it. That's why the Apple TV 2 will only mirror up to 720p because it can't decode any higher.
 

JohnDoe98

macrumors 68020
May 1, 2009
2,488
99
Well, yes but still i think it could be optimized to work with the pre 2011 models somehow.

Based on what? Wishful thinking? What makes you think pre 2011 models can work any better than Air Parrot? And if they could, why hasn't Air Parrot optimized their software? Don't you think they could make more money if they offered a better product?
 

ixodes

macrumors 601
Jan 11, 2012
4,429
3
Pacific Coast, USA
Apples secret plan is becoming apparent.

They began with the iToyz model of proprietary mobile devices that are largely sealed. ie: non replaceable batteries, no expansion card slot or USB port, etc.

Next they are in the midst of the iOS - OS X convergence.

The mostly unserviceable, high end, expensive MBPr is released.

Followed by the even more iOS like, OS X 10.8 Mountain Lion.

Then the Q4 release of the iOS 6 Equipped iPhone 5 (or whatever they name it).

Next up, the pricier Retina equipped MBA's, followed eventually by a complete abandonment of upgradeable computers running the central all powerful, eye candy laden iOS across all products.

All users locked into iCloud, and Apple Financial via their proprietary iPayments.

Just like Disneyland, you gain access to AppleLand via your money, and the promise you'll never leave the compound :)
 

Senseotech

macrumors 6502a
Nov 23, 2009
785
28
NC
Apples secret plan is becoming apparent.

They began with the iToyz model of proprietary mobile devices that are largely sealed. ie: non replaceable batteries, no expansion card slot or USB port, etc.

Next they are in the midst of the iOS - OS X convergence.

The mostly unserviceable, high end, expensive MBPr is released.

Followed by the even more iOS like, OS X 10.8 Mountain Lion.

Then the Q4 release of the iOS 6 Equipped iPhone 5 (or whatever they name it).

Next up, the pricier Retina equipped MBA's, followed eventually by a complete abandonment of upgradeable computers running the central all powerful, eye candy laden iOS across all products.

All users locked into iCloud, and Apple Financial via their proprietary iPayments.

Just like Disneyland, you gain access to AppleLand via your money, and the promise you'll never leave the compound :)

I really do fear for you conspiracy quacks, eventually you're going to completely lose touch with reality.
 

NewbieCanada

macrumors 68030
Oct 9, 2007
2,574
38
Have you honestly not read a SINGLE post in this thread?

Read yes. Understood????

----------

Apples secret plan is becoming apparent.

They began with the iToyz model of proprietary mobile devices that are largely sealed. ie: non replaceable batteries, no expansion card slot or USB port, etc.

Last time I checked you're still allowed to buy whatever brand of hardware you like.
 

matbal

macrumors newbie
Jul 8, 2012
7
0
New Mexico
Not quite. It has to encode and send it through the network, but the Apple TV will do the decoding of the encoded stream, just like it works when you currently airplay a video through iTunes. It just sends the video and the Apple TV decodes it. That's why the Apple TV 2 will only mirror up to 720p because it can't decode any higher.

I understand that, guess the way I put it was unclear. Just implying that any latency saved through the whole process (encoding with QuickSync in this case, which saves a ton of time) plays a huge role in the implementation and performance of AirPlay.
 

GermanyChris

macrumors 601
Jul 3, 2011
4,185
5
Here
You'd have to be able to transcode h.264 1080p faster than realtime in order to make Airplay work, which is why we're insisting on 1080p. In addition, you'd have to be able to do so with extremely little impact on the speed of the computer in doing other tasks.



What's kigo? MP4 doesn't matter since h.264 is the format Airplay uses. If you're going to do a test, use the same format...



I'm supposed to know this how?



Why do you think I don't know this? I've given you plenty of evidence I do.

How many times do I need to state that I care very little about 1080p because I don't own any 1080p video. I'm going to try to convert some 1080p today to see if it transcodes faster than real time. It doesn't need to do it with very little impact on the speed of the computer it needs to be able to do it and share it's screen. Again 1080 is only relevant if you have the new Apple TV.

H.264 is a Codec it's how you get to MP4 (MPEG-4) which is one the formats that Apple TV uses..it's called h.264 it's the standard for compressing HD video to include BluRay bluray players need to decode H.264. There are other ways to compress HD video and no the Apple TV won't read them. You can and do use H.264 to compress regular movies also. H.264 is what you use to rip DVD's into you iTunes library also it's is the codec most popular converters use of which Handbrake and Kigo use. http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC

Your supposed to figure out things by looking at them in context.

Your second comment shows this should be explained.


http://www.apple.com/appletv/specs.html
H.264 video up to 1080p, 30 frames per second, High or Main Profile level 4.0 or lower, Baseline profile level 3.0 or lower with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats
MPEG-4 video up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats
Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format

I've spent enough time in timeout recently so this is the last post of yours I'm going to respond to becasue I'll no longer be able to remain polite.
 
Last edited:

Senseotech

macrumors 6502a
Nov 23, 2009
785
28
NC
How many times do I need to state that I care very little about 1080p because I don't own any 1080p video. I'm going to try to convert some 1080p today to see if it transcodes faster than real time. It doesn't need to do it with very little impact on the speed of the computer it needs to be able to do it and share it's screen. Again 1080 is only relevant if you have the new Apple TV.

H.264 is a Codec it's how you get to MP4 (MPEG-4) which is one the formats that Apple TV uses..it's called h.264 it's the standard for compressing HD video to include BluRay bluray players need to decode H.264. There are other ways to compress HD video and no the Apple TV won't read them. You can and do use H.264 to compress regular movies also. H.264 is what you use to rip DVD's into you iTunes library also it's is the codec most popular converters use of which Handbrake and Kigo use. http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC

Your supposed to figure out things by looking at them in context.

Your second comment shows this should be explained.


http://www.apple.com/appletv/specs.html
H.264 video up to 1080p, 30 frames per second, High or Main Profile level 4.0 or lower, Baseline profile level 3.0 or lower with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats
MPEG-4 video up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats
Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format

I've spent enough time in timeout recently so this is the last post of yours I'm going to respond to becasue I'll no longer be able to remain polite.

None of this matters at all since you have yet to show us conclusively that your G5 can encode the contents of your screen (likely running at a resolution close to the raw pixels found in 1080p) faster than real-time. AirPlay mirroring doesn't care if you "only have 480" content, because its going to mirror the ENTIRE display, be that 1920x1080 (scaled down to 720p if your aTV or TV set are limited) 1440x900, or anything else. Standard Airplay (that is, sending a specific media file to your AppleTV from a Mac) and Airplay Mirroring are two separate beasts; one simply sends data over the network for the aTV to decode and play back, the other is going to have to encode your entire display in its full resolution to something compatible with an aTV, and then send that for decoding and play back.
 

CyBeRino

macrumors 6502a
Jun 18, 2011
744
46
How many times do I need to state that I care very little about 1080p because I don't own any 1080p video.

Yet when you're encoding your entire screen, that's exactly (well, maximally) what you're sending. The size of a video you're playing on said screen does not matter.

Surely you don't still work with a 1024x768 or smaller screen.

If all you're interested in is airplaying videos as opposed to your entire desktop, any mac can do that given the source is h.264 already. Because then it's just streaming pre-existing data.
 

mattmcguire

macrumors newbie
Jul 9, 2012
2
0
So you're telling me that my 12 core Mac Pro with 64 gig of ram can't handle something a piddley Mac Mini can do? This is ridiculous.
 

CyBeRino

macrumors 6502a
Jun 18, 2011
744
46
So you're telling me that my 12 core Mac Pro with 64 gig of ram can't handle something a piddley Mac Mini can do? This is ridiculous.

Well in fairness your 12-core Mac Pro could probably do it. But then there'd have to be an entirely separate implementation of the feature just for the tiny, tiny amount of people who have Mac Pros with 12 cores. Not worth it.

Just use AirParrot.
 
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