Revisiting The SlimPort Output Of Android Devices

HDMI-SplitterA few days back I received a G+ IM from someone who had discovered my description of how to use an HDMI splitter to make the output of an Android tablet more useful. He posed a question that I think is worth sharing. He asked the following;

Dear Michael,

I just read your article about capturing video from a Nexus 7 and I have a question about that if you do not mind.

I bought a Nexus 7 (2013) to be able to give presentations and show short movies in my classroom. The thing is that most projectors still have only a VGA socket. I have a cable Slimport=>HDMI and it works perfectly well.

I also have a cable HDMI=>VGA but it does not work and I suspect it is because of the HDCP. I was wondering if the splitter and HDCP stripper you used could work in my case. If yes that would be great and would literally save my classes.

Thank your for your time and sorry again to bother you with that.

Thibaut Bailly

To begin, as a blogger, I welcome questions from readers. For the most part people blog because the want to share what they’ve discovered. As a non-professional blogger I may not always respond immediately, but I try to respond to every comment and question.

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Capturing The Video Output Of A Nexus 7 Tablet

DoorBot-in-Nexus5There are times when it would be handy to capture the video output of an Android device. This is typically what I need when writing something about an app that does something dynamic. For example, AudioTool by J.J. Bunn. As a tool for simple audio test & measurement capturing its output in real-time is the ideal way to communicate the measurement being taken. A static screen shot is fast & easy to accomplish, but video can be much more illuminating.

Both my Nexus 4 and Nexus 7 (2013) support the use of a Slimport USB-to-HDMI adapter to connect to a monitor. The output of that adapter is 1080p60. The BlackMagic Design Intensity Pro HDMI capture card that I’ve used for the past couple of years can capture streams up to 1080i60, but not 1080p60.

Quite recently I swapped out the Intensity Pro for an AVerMedia Game Broadcaster HD. This card has the ability to capture a 1080p60 stream. In so doing it drops every second frame to actually save a 1080p30 stream to disk.

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