新Apple TV(第3代)上的Airplay用于第二屏，而不是1080p [英] Airplay on new Apple TV (3rd gen.) for second screen not at 1080p

问题描述

我正在开发一个应用程序，该应用程序使用Airplay镜像进行第二次显示，其内容与iPad本身不同.我使用的是iPad3和ATV3(即2012年3月发布)，它们通过HDMI可以连接到分辨率为1920x1080的LCD上.

I am working on an app that uses Airplay mirroring for a second display that has different content to the iPad itself. I'm using an iPad3 and ATV3 (i.e. released March 2012) attached to an LCD capable of 1920x1080 via HDMI.

通过Airplay镜像，第二个屏幕的 UIScreen 可通过 [UIScreen screens] 数组使用.通过将 overscanCompensation 设置为3，我可以消除黑色边框，但是我只能显示1280x720的图像.显示器的工作频率为1920x1080(即在其菜单中选中，设置为"Just Scan"(Just Scan)，其余的Apple TV接口为1080p).

With Airplay mirroring, the second screen's UIScreen is available through [UIScreen screens] array. I was able to get rid of the black borders by setting overscanCompensation to 3 but I can only display a 1280x720 image. The monitor is working at 1920x1080 (i.e. checked in its menu, set to "Just Scan", and the rest of Apple TV interface is at 1080p).

当我从 UIScreen 返回 availableModes 数组时，它只有一项"1280x720"！

When I return the availableModes array from UIScreen it only has one item "1280x720"!

这是否意味着iOS 5.1在新的Apple TV上仅支持1280x720的airplay镜像，而不支持1080p ！?还是我做错了事.

Does this mean that iOS 5.1 only supports 1280x720 on the new apple tv for airplay mirroring and not 1080p!? or am I doing something wrong.

推荐答案

Airplay本身仅支持720p的流媒体.这是一些聪明的人为解决这个问题所做的，但是您需要组装一些硬件.

Airplay itself only supports streaming in 720p. Here is what some clever guys did to get around it but you need to assemble some hardware.

http://appadvice.com/appnn/2011/03/airplay- 1080p格式

编辑，糟糕，您可以流式传输1080p，但只能镜像720p(内存不足?我不知道)

EDIT Oops, apparently you CAN stream 1080p, but you can only MIRROR 720p (not enough memory?? I don't know)

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