Camtest
Camtest (styled camtest in its address) is a test page on the website of Molecular Reality Corporation that shows the two cameras pointed at its laboratory bench side by side, under the heading "Lab Camera Feeds". The cameras are a basic model that reports itself as "USB2.0 Camera" and an "EMEET SmartCam C950 4K". The same two cameras appear, labelled "Microscope" and "Fluidics", over the current trace of the company's live molecular stream. When they are off, the stream page's two panes read "no live view", and the archive's viewer, which shows stills from them, reads "no camera".[1][2]
Molecular Reality added the page in June 2026. Stills from both cameras are kept with every recording in the Streams archive.[3]
Operation
A laptop at the bench sends each camera's picture with the open-source program FFmpeg to a media server, which passes it on to browsers as low-latency HTTP Live Streaming, played in the page by the hls.js library. A status line says whether both feeds have connected ("2/2 live") or names the camera that failed.[1][3]
Over the videos sit quality buttons, four for the EMEET camera, from 480p up to 4K, and two for the other, 480p and "Native". Both cameras start at 480p, the lowest setting offered, the 4K model included; the basic camera's own picture is 640 by 480 pixels.[3] Pressing a button sends the bench a request and leaves the picture alone. The page replies, for instance, "emeet → 1080p requested. Restart cam watcher to apply." The new setting arrives when someone at the bench restarts the program that watches the cameras.[1]
History
In June 2026 the stream page showed no cameras at all, while Camtest showed one. A debugging note kept in the company's code repository traced the difference: the stream page was asking a content-delivery network for video that the network did not carry, and Camtest asked the company's own server. Its recommendation was to copy Camtest: "Option A for now. CDN can come later if needed."[3]
The same note explained why the second camera was blank on both pages. It was "held by another application", and the advice was to close "OBS or any browser tab using the camera" and start the video program again.[3]