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HDMI or High-Definition Multimedia Interface is a proprietary audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from one device to another.

More information on HDMI specifications can be found on the official website:


Aximmetry supports a variety of capture cards that allow you to capture multiple HDMI signals from any device that has an HDMI output. 

Aximmetry does not have any restrictions when it comes to HDMI usage, meaning you can use as many input ports as your hardware allows. At the time of writing this article, there is no capture card on the market with HDMI 2.1 support. That is why the highest input setting possible currently is 4K60. So, if your production requires 8K resolution, you should use SDI


Aximmetry will treat any device that is recognized as a display on Windows as an Output. This means that all the HDMI ports on the back of a graphics card can be used as HDMI output. If the installed GPU(s) support HDMI 2.1, we can get an output up to 8K60.

Capture cards that have HDMI-Out ports are supported as well.

Aximmetry does not have any restrictions on the number of HDMI outputs. You can use as many ports as your hardware allows. 


HDMI can also carry Audio. HDMI offers up to 32 uncompressed digital audio channels in the case of HDMI 2.1 and 2.0 and 8 uncompressed channels in the case of HDMI 1.4. Keep in mind that Aximmetry is able to process up to 16 channels of Audio.

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