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TS4215: iOS: Troubleshooting AirPlay and AirPlay Mirroring

Learn about iOS: Troubleshooting AirPlay and AirPlay Mirroring

TS4215 Why is it not full screen when mirroring ?

28635 Views 8 Replies Latest reply: Feb 5, 2014 12:01 PM by george_stephen@btopenworld.com RSS
Big G34 Level 1 Level 1 (0 points)
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Apr 6, 2013 4:29 AM

Can this be fix to fit a 42" tele ?

AppleTV 2
  • Rudegar Level 6 Level 6 (18,480 points)
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    Apr 6, 2013 4:35 AM (in response to Big G34)

    you don't mention if you mean mirror by ios device or osx

    but it's mirror and if tv is widescreen then it will never be full screen

  • vazandrew Level 6 Level 6 (13,030 points)
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    Apr 6, 2013 8:14 AM (in response to Big G34)

    There is no issue.

     

    iPad aspect ratio is 4:3

     

    Your TV is 16:9

     

    iPhone 5 will fill the screen if in landscape

  • vazandrew Level 6 Level 6 (13,030 points)
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    Apr 6, 2013 3:38 PM (in response to Big G34)

    Resizing is stretching the image to make it fit. Videos and photos are being streamed to the device via airplay, mirroring the screen is showing your device exactly as you see it on the screen.

     

    I think you are missing the point.

  • iLuvgeek Level 1 Level 1 (0 points)
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    Jul 13, 2013 2:38 PM (in response to Big G34)

    There are two culprits here. the first is pillarboxing, that's what happens when a 4x3 aspect ratio picture (like the ipad) or a 5x4 picture (like 35mm film) is displayed on a 16x9 display like a modern TV. This results in black bars on the left and right of the active picture.

     

    I think what you may be talking about is called "underscan". This results in a smaller picture surrounded by black.

     

    The HDTV standard was developed in the late 1980s and early 1990s when CRTs were used to display video. CRT displays overscan the display, because the phosphor extends past the visible edges of the display. Also, in the old analog broadcast system, the picture was transmitted in real-time, so the hidden parts of the picture contained the sync, closed captioning and other signals.

     

    Even though digital TV doesn't need it, most modern TVs still simulate overscan by stretching the picture slightly, cutting off the edges, unless you set the TV to "full" or "PC" mode.

     

    When the Apple TV gets an AirPlay signal, to keep the TV from cutting off the edges (like the status or menu bars) it apples underscan to compensate for the TVs overscan.

     

    On the AppleTV you can turn off underscan by going to Settings -> Audio & Video and set "Adjust For AirPlay Overscan" to "Off".

  • Max Cardale Level 1 Level 1 (5 points)
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    Nov 6, 2013 2:14 AM (in response to iLuvgeek)

    Excellent explaination and just the information I was looking for. Thank You!

  • george_stephen@btopenworld.com Level 1 Level 1 (0 points)
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    Feb 5, 2014 12:01 PM (in response to iLuvgeek)

    I thought this hadn't worked but the next time I used mirroring it was full screen.  Tyvm.

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