Fix incorrect bitrate performance metric. (#5986)

* Fix incorrect bitrateperformance metric.

* Average all instances.

Author: michelinewu

app/services/streaming/streaming.ts

@@ -3525,6 +3525,10 @@ export class StreamingService
       dataOutput += instance.dataOutput;
     }
 
+    // TODO: Add UI to show bitrate by display but for now average the all instances, which is more accurate
+    // than only showing the horizontal display's bitrate in dual output mode
+    kbitsPerSec = Math.round(kbitsPerSec / Object.keys(this.contexts).length);
+
     return { droppedFrames, totalFrames, kbitsPerSec, dataOutput };
   }