Revert "the call to checkVideoPresence was made in the first call to …

…SwitchStream, done in composeStreams. The problem is, at this specific time, no StreamProcessor has been built. The return value of this function is always false."

This reverts commit 29c0eff.

To ensure VOD is always played until end (Dash-Industry-Forum#22).
See: Dash-Industry-Forum#1901

src/streaming/controllers/StreamController.js

@@ -297,6 +297,7 @@ function StreamController() {
         if (oldStream) oldStream.deactivate();
         activeStream = newStream;
         playbackController.initialize(activeStream.getStreamInfo());
+        videoTrackDetected = checkVideoPresence();
 
         //TODO detect if we should close and repose or jump to activateStream.
         openMediaSource(seekTime);
@@ -341,8 +342,6 @@ function StreamController() {
                 });
                 playbackController.seek(startTime); //seek to period start time
             }
-        }else {
-            videoTrackDetected = checkVideoPresence();
         }
 
         activeStream.startEventController();