Re: [Rockies-Edu] iPad HDMI Mirroring Scaling Issue
Re: [Rockies-Edu] iPad HDMI Mirroring Scaling Issue
- Subject: Re: [Rockies-Edu] iPad HDMI Mirroring Scaling Issue
- From: "Michael T. Scott" <email@hidden>
- Date: Thu, 07 Sep 2017 11:39:24 -0600
Hi Dan,
It’s always striking to see the iPad in windowbox, aka underscan, what it’s
called when you have black bars on top and on bottom, when mirrored.
If you ever want an official answer to a specific and reproducible issue like
this, I encourage you to contact AppleCare who can directly support you, it’s
always comforting to have a final word on what you can and cannot support.
AppleCare Education: 1-800-800-2775 option 3.
iOS supports several resolution modes while mirroring. You’ve probably seen
iPad mirror fullscreen video in the native resolution and ratio without
windowboxing, through AirPlay or the lightning HDMI adapter. That said home
screen mirroring and default mirroring for apps behaves a little differently,
typically displayed in windowbox (apps may use a custom view/resolution when
mirroring, hence fullscreen video playback). Part of this is the challenge in
being able to mirror the home screen and apps in portrait and landscape modes
on the fly.
The most recently updated support article I found around this topic is this:
About overscan and underscan on your Mac, Apple TV, or other display (August
2017)
https://support.apple.com/en-us/HT202763
Just before that this one was updated:
About Apple Digital AV Adapters for iPhone, iPad, and iPod touch (July 2017)
https://support.apple.com/en-us/HT202044
Neither precisely addresses what we're talking about here but help provide
Apple perspective.
Let me know if I can help any more.
-Mike
Michael Scott, Systems Engineer
Apple Education
Apple Inc.
(720) 346-3871
www.apple.com/education
> On Sep 7, 2017, at 10:28 AM, Dan Miller <email@hidden> wrote:
>
> Good morning. Over the last year, we have converted most of our classrooms to
> HDMI-only inputs to their projectors. We have discovered a problem with
> connecting the iPads via the HDMI dongle, where the displayed image is much
> smaller than the overall viewable area of the projector. Teachers are
> understandably not happy with this, and want their VGA input back (which
> projected the iPad at full-size). The iPads in question are primarily Airs
> and Air II’s assigned to the teachers, there may be a few iPad 4’s from our
> one-to-one program as well. I have read through a bunch of related threads
> online about this, but haven’t found anything remotely definitive. Some
> reference the aspect ratio, some using Apple TV, etc., but nothing really
> seems to address the issue directly. Has anyone else experienced this, and/or
> have a fix?
>
> Thanks,
>
> Dan Miller
> Technology Specialist
> Telluride School District
> (970)-369-1235
>
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