定时器清理

src/features/OnlineExam/Examing/FaceMotion/FaceMotion.vue

@@ -867,6 +867,9 @@ export default {
             resolve();
             clearInterval(interval);
           }
+          if (document.getElementById("inputVideo") === null) {
+            clearInterval(interval);
+          }
         }, 300);
       });
       console.log(videoEl.readyState, faceapi.nets.tinyFaceDetector.params);