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to enOehT
Re: [OS X] AIRPLAY not showing up in Mountain LionI think it's the hardware H.264 encoding that is enabled on the Sandy Bridge and newer platforms. That's what I was told anyways. |
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Razzy
Member
2012-Jul-28 8:45 am
Then how come iPads and iPhones are able to do it? |
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Riamen Premium Member join:2002-11-04 Calgary |
Riamen
Premium Member
2012-Jul-28 11:34 am
said by Razzy:Then how come iPads and iPhones are able to do it? The iPhone doesn't do AirPlay mirroring. The new iPad and iPad 2 have hardware encoders to mirror the display to Apple TV. As for AirPlaying video, if the video plays on an iPhone/iPad it's already in a format that will play on the Apple TV so there's no need to encode it. |
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The A4 and A5 have hardware H.264 acceleration built-in. |
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Count Zero |
to Riamen
My iPhone 4S can do mirroring. |
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Riamen Premium Member join:2002-11-04 Calgary |
Riamen
Premium Member
2012-Jul-28 1:55 pm
My mistake, I have iPhone 4, it doesn't. Seems like devices with an A4 can't do the needed encoding for mirroring. |
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Guess you're right. I could check with my wife's iPhone 4 when she gets home but perhaps it is just limited to the iPad 2 and the iPhone 4S with their A5s for video mirroring. |
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Riamen Premium Member join:2002-11-04 Calgary |
Riamen
Premium Member
2012-Jul-28 2:07 pm
said by Count Zero:Guess you're right. I could check with my wife's iPhone 4 when she gets home but perhaps it is just limited to the iPad 2 and the iPhone 4S with their A5s for video mirroring. Are we talking about the same thing? I can AirPlay videos from my iPhone 4, I'm talking mirroring what's on the iPhone screen to an Apple TV including the launchpad icon screen. |
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The Dv8orJust call me Dong Suck Oh, M.D. Premium Member join:2001-08-09 Denver, CO ARRIS TG862 Cisco 2811 TP-Link Archer AX10
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said by Riamen:said by Count Zero:Guess you're right. I could check with my wife's iPhone 4 when she gets home but perhaps it is just limited to the iPad 2 and the iPhone 4S with their A5s for video mirroring. Are we talking about the same thing? I can AirPlay videos from my iPhone 4, I'm talking mirroring what's on the iPhone screen to an Apple TV including the launchpad icon screen. 4S does full mirroring, 4 does not. |
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said by The Dv8or:said by Riamen:said by Count Zero:Guess you're right. I could check with my wife's iPhone 4 when she gets home but perhaps it is just limited to the iPad 2 and the iPhone 4S with their A5s for video mirroring. Are we talking about the same thing? I can AirPlay videos from my iPhone 4, I'm talking mirroring what's on the iPhone screen to an Apple TV including the launchpad icon screen. 4S does full mirroring, 4 does not. This. When you stream video you aren't mirroring the video - it's just sending the datastream to the AppleTV for processing and viewing. When you mirror your iPhone or iPad creates a data stream in H.264 format of what you're seeing on your screen and sends that to the AppleTV. That's why hardware encoding is so important - sending a raw, uncompressed datastream would be too demanding on the network and using the general CPU to do the encoding would hit system performance greatly. |
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