cello | A tool to measure video latency in a SDI workflow

cello is a C++ library. cello has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Cello - A tool to measure video latency in a SDI workflow. Imagine a workflow, a black box. It has a SDI input and a SDI output. For example, a video encoder -> video decoder workflow. The tool used the blackmagic decklink DUO2 four port SDI card to create and monitor video entering and leaving the blackbox. Specifically, the physical ports on the rear of the DUO2 card, left to right are: REF A B C D. Cello receives normal HD video (720p or 1080i) signal on input A. This can be anything you like, a product feed, a debug feed, colorbars, whatever. Cello burns in video metadata into the input signal, and outputs this on port C. Feed port C to the input of the blackbox workflow. The blackbox workflow eventually outputs SDI video, connect this to port D. Cello analyzes the video differences between port C and D, extracts metadata and calculates the video latency between these two points. Cello outputs the statistics to the console. Cello outputs a copy of the port D signal on Port B, and burns into the signal additional information, including the measured latency.