port fix

frontend/ang_dvrip/src/app/components/stream/stream.component.ts

@@ -34,7 +34,14 @@ export class StreamComponent implements OnInit {
   getStreamUrl() {
     this.http.get(`api/dvrip/stream/${this.recorder_index}/${this.channel_index}/${this.selected_stream}`).subscribe(
       (r:StreamUrlResponse|any) => {
-        const url = `${location.protocol}//${location.hostname}:${r.port == 0?+location.port:r.port}/${r.route}`;
+        var port;
+        if (location.port.length == 0) {
+          port = "";
+        } else {
+          port = `:${r.port == 0?+location.port:r.port}`
+        }
+
+        const url = `${location.protocol}//${location.hostname}${port}/${r.route}`;
         this.url = this.sanitazer.bypassSecurityTrustResourceUrl(url);
         this.unsafe_url = url;
       }