fix抓拍上传失败，摄像头冻住

src/components/FaceRecognition/FaceRecognition.vue

@@ -142,6 +142,7 @@ export default {
         context.drawImage(video, 0, 0, 220, 165);
 
         canvas.toBlob(resolve);
+        video.play();
       });
     },
     async uploadToServer(captureBlob) {