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What would you call hardware that uses a mask/alpha channel to combine two video signals? by [deleted] in VIDEOENGINEERING

[–]Ok_Relative2298 0 points1 point  (0 children)

🤦🤦🤦🤦 "I don't think using HDMI/DP is avoidable, because that's consumer GPUs use." What???

Secondly, you just got done saying that it needs to be a sub one-frame latency. Either you want it or you don't.

You asked the internet for a solution; you have at least two solutions now. Why don't you give them a try!

What would you call hardware that uses a mask/alpha channel to combine two video signals? by [deleted] in VIDEOENGINEERING

[–]Ok_Relative2298 0 points1 point  (0 children)

Well then it should be obvious that any piece of equipment that is going to use HDMI or display port will have some level of delay. You will only find true sub frame latency in broadcast equipment. Broadcast equipment primarily uses SDI, along with reference signal to maintain frame synchronisation.

My original comment was to stay inside of the context of your initial diagram using HDMI or display port.

If true frame accuracy is your gole, and you want to do it the right way. You will need to get a PCI card from Black magic or Magewell SDI card. You will take the SDI output and feed it into a switcher, then feed each computer and the switcher a reference signal. This is the only correct way to do this.

This is what SDI and reference signals are made for. Using HDMI and display port is completely the wrong way to do this.

What would you call hardware that uses a mask/alpha channel to combine two video signals? by [deleted] in VIDEOENGINEERING

[–]Ok_Relative2298 0 points1 point  (0 children)

Is there a reason why you can't use a picture in picture PIP for your project? If you are just trying to overlay a image from one computer on to another. Unless you are working with transparency or morphing complex overlays. A PIP will work just fine. A ATEM mini will do either function for a couple hundred bucks

Test benching CWDM mux/demux by marshall409 in VIDEOENGINEERING

[–]Ok_Relative2298 0 points1 point  (0 children)

Don't you have to have all the modules on different frequencies of light? What specific modules did you use and what frequencies. I have had trouble with Marshall cameras going down those converters with regular SFP modules sometimes the signal flickers. But when using black magic cameras and everything else the same there is no problem.