Fix MSE Issues (#4725)

* Don't close mse when pausing video

* Add message about MSE on iOS

web/src/components/MsePlayer.jsx

@@ -64,10 +64,11 @@ export default function MsePlayer({ camera, width, height }) {
       }
     };
 
-    video.onpause = () => {
+    return () => {
+      const video = document.getElementById('video');
+      video.srcObject = null;
       ws.close();
-      video.src = null;
+    };
-    }
   }, [url]);
 
   return (

web/src/routes/Camera.jsx

@@ -15,6 +15,7 @@ import { useApiHost } from '../api';
 import useSWR from 'swr';
 import WebRtcPlayer from '../components/WebRtcPlayer';
 import MsePlayer from '../components/MsePlayer';
+import videojs from 'video.js';
 
 const emptyObject = Object.freeze({});
 
@@ -98,6 +99,15 @@ export default function Camera({ camera }) {
   let player;
   if (viewMode === 'live') {
     if (viewSource == 'mse') {
+      if (videojs.browser.IS_IOS) {
+        player = (
+          <Fragment>
+            <div className="w-5xl text-center text-sm">
+              MSE is not supported on iOS devices. You'll need to use jsmpeg or webRTC. See the docs for more info.
+            </div>
+          </Fragment>
+        );
+      } else {
         player = (
           <Fragment>
             <div className="max-w-5xl">
@@ -105,6 +115,7 @@ export default function Camera({ camera }) {
             </div>
           </Fragment>
         );
+      }
     } else if (viewSource == 'webrtc') {
       player = (
         <Fragment>