Step a frame at a time and read off exactly which source frame is wrong.
The timeline under the video shows what the pipeline knew about each sampled frame.
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Source frame—the number the overlay prints
Clip time—
Calibration—
Players placed—
Ball—
on or near a pin1–2 s from a pinover 2 s from a pinno homography — nothing can be placedbar height = players placed
copied
←→ one frame ·
Shift+arrow ten · Space play/pause ·
G next problem frame · C copy reference
What the colours can and cannot tell you. Distance from a solved pin is
the measured accuracy predictor on this footage: about 0.46 m of ground error
two seconds from a pin, 3.55 m at four. So red means suspect, not wrong.
The reverse is the real caveat: a homography that is confidently wrong while
sitting on a pin reads here as the best possible frame. This narrows where to
look; it certifies nothing. Grey frames have no homography at all, so no player
can be placed in metres and the pitch panel is genuinely empty there.