Blackmagic Intensity Pro Input Latency

I’ve wanted to measure this for a while, and since I was asked about it today I finally got around to doing it.

The question is this: how much latency does the BMD Intensity Pro Hardware/Software stack add to the captured stream? The answer I arrived at is 48 to 62 milliseconds, with an arithmetic mean of 56. This is on a 720p60 stream.

I measured this by mirroring my PC’s GPU output and feeding it directly to my monitor as well as to the BMD card via HDMI. Then I opened PtBi, disabled all postprocessing, and took a lot of screenshots like this:

Then it’s just a matter of subtracting the 2 numbers, removing the known latency introduced by PtBi (just a few ms) from that, and repeating the measurement.