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Say I had a laptop [Correction: notebook, don't want my thighs medium rare], any OS, and it has an HDMI port build into the side. Would it be remotely possible to hack it into an input, provided it wasn't already designed for that? I would figure all video ports operate straight off the graphics chip, however, are there ways to over-ride that functionality on the driver level? Driver hacks already exist for plenty of things such as the classic example: Bluetooth adapters (so we can play with our PS3 controllers and save a buck) However, is HDMI one of these tamperable interfaces? As far as the interface standard is concerned, are HDMI ports designed to be either way or are they Input/Output specific?

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up vote 5 down vote accepted

They cannot.
The ports are only HDMI out.
I you want HDMI in, you'll have to buy HDMI capture card for laptop.

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Video capture is totally different hardware-wise from video generation. They're as different as speaking and listening. –  David Schwartz Jun 28 '12 at 7:35
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