Setup sequence
On air & playback
Calibration & grid
Down & distance
Diagnostics & chroma
During calibration
Click 4 field landmarks clockwise from the upper-left, then Enter. To fine-tune, drag any grid handle onto the real painted intersection it belongs to — the grid deforms to pass exactly through every handle you move. A magnified loupe follows the cursor while dragging, for pixel-accurate placement.
The key is built from a Base range — one HSV range, always active — plus any number of Include colors unioned with it, and Exclude colors carved back out. A second grass shade in sun and shadow, or a green-leaning sideline tarp that needs to stay excluded, are both handled by adding a color rather than fighting one range.
Shift Click the field samples straight into Base, as long as no custom Include color has been added yet — once one exists, sampling and slider edits target whichever range is selected in the Include or Exclude list. The shared slider editor marks which one that is with a color stripe:
To see exactly what the current sliders are keying, use Show Chroma Mask in the Grass Key panel, or hold M anywhere for a momentary look without switching it on. It paints solid white, pixel-for-pixel, over everything the ranges currently include — no smoothing — so a gap in field coverage shows up at its true size while you're tuning, not softened away or exaggerated.
The Pan Mute Threshold slider (pixels moved per frame) automatically takes graphics off air the instant a camera pan outruns it — tracking can't keep the lines aligned mid-swing, so it mutes rather than show them drifting. Output fades back in on its own, a little more gradually than usual, once the camera settles.
Set to 0 to disable the safety net entirely.
Tracking drifted or lost: press R to relocalize from the saved reference view.
Calibration: auto-saves as you work, but save a named profile per venue — it won't be there next time otherwise.
Input switching: DeckLink and NDI can't run at the same time; stop one before starting the other.