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Video Capture Card diagnostics

Test what the browser can see. Know when it cannot.

Test whether the capture card appears as a browser-visible camera/video device before changing OBS, streaming or USB configuration.

Run these first

Relevant live checks

Webcam TestOpen your webcam locally to verify that the browser can access and display a live camera stream.
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Webcam Resolution TestCheck the active video track resolution your browser receives from the camera.
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Webcam FPS TestEstimate the actual delivered webcam frame rate.
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First diagnostic sequence

Do the high-signal checks before risky changes

  1. 1

    Select the capture card in DeviceOK webcam test

  2. 2

    Confirm source device is outputting video

  3. 3

    Compare OBS/streaming app only after browser video works

What DeviceOK/browser can help check
  • Open UVC-compatible capture devices as cameras
  • Report active resolution/frame rate
What this browser page cannot prove
  • Test HDMI source electronics
  • Read HDCP state reliably
  • Repair capture-card firmware