diff --git a/web/calibrate/Light9Camera.ts b/web/calibrate/Light9Camera.ts
--- a/web/calibrate/Light9Camera.ts
+++ b/web/calibrate/Light9Camera.ts
@@ -76,6 +76,8 @@ export class Light9Camera extends LitEle
       video: {
         facingMode: { ideal: "environment" },
         frameRate: { max: 10 },
+        width: 640,
+        height: 480,
       },
     };
     const stream = await navigator.mediaDevices.getUserMedia(constraints);