There are lots of call outs of source vs sink, but page 38 will perhaps convince you. It shows the sink is the input to a differential op-amp, while the source

There are lots of call outs of source vs sink, but page 38 will perhaps convince you. It shows the sink is the input to a differential op-amp, while the source is a current source. The same lines are connected to different circuits, depending on if you're a source or a sink. EDIT: This looks like an interesting little box, if somebody does need the ability to read HDMI. You would still need to save it and then re-stream it, I think, to get it to your monitor. https://www.blackmagicdesign.com/products/h264prorecorder https://www.blackmagicdesign.com/products/h264prorecorder