Cuepoints when changing video

Question

Hi,
I am making a video switching project which switches between videos, and resumes at the current time. The project requires the video to pause at certain points to display information. The cuepoints will remain the same between videos and the video length are exactly the same (videos show same scenario but at different angles).
So far I have made a working video player with one button to switch to another video. If I let the first video play throughout, all cuepoint events are triggered. If I change video before a cuepoint has fired, the cuepoints are no longer triggered throughout the whole video. Here is the code:
package
    import com.devnet.osmf.events.*;
    import flash.display.MovieClip;
    import flash.events.MouseEvent;
    import flash.events.Event;
    import org.osmf.media.MediaPlayer;
    import org.osmf.events.TimeEvent;
    import org.osmf.containers.MediaContainer;
    import org.osmf.metadata.*;
    public class OSMFComponents extends MovieClip
            private var curr:Number;
        public function OSMFComponents()
        controlBar.mediaPlayer = mediaDisplay;
        mediaDisplay.load("Scenario A.mp4");
        mediaDisplay.autoPlay = true;
        mediaDisplay.addASCuePoint(10, "Chapter 1");
        mediaDisplay.addASCuePoint(20, "Chapter 2");
        mediaDisplay.addASCuePoint(30, "Chapter 3");
        mediaDisplay.addEventListener(CuePointEvent.CUE_POINT, onCuePointEvent);
        changeVid.addEventListener(MouseEvent.CLICK, changeVideo)
public function onCuePointEvent( event:CuePointEvent ):void
    trace("Show text or graphics… name = "+event.name+", time = "+event.time);
    mediaDisplay.pause();
  private function changeVideo(e:MouseEvent):void
   curr = mediaDisplay.playheadTime;
   mediaDisplay.load("Scenario B.mp4");
   mediaDisplay.addEventListener(Event.ENTER_FRAME, changeVideoNow);
  private function changeVideoNow(e:Event):void
   if(mediaDisplay.bytesLoaded == mediaDisplay.bytesTotal) { // && mediaDisplay.cuePointsLoaded) {
               mediaDisplay.removeEventListener(Event.ENTER_FRAME, changeVideoNow);
         if(mediaDisplay.canSeekTo(curr)){
                         mediaDisplay.seek(curr);
   } else {
          trace("video not fully loaded yet");
So if changeVideo() is called, the video changes and resumes in the correct place thanks to changeVideoNow(). However, the cuePoints assigned to mediaDisplay no longer fire. Any ideas why?
I am using the tutorial from here:  http://www.adobe.com/devnet/flash/articles/osmf-media-player.html
Thanks,
hp

Answer 1

Hello Joel,
I determined that this problems happens when I change any of the camera parameters using the Mikrotron MC Control application before attempting an acquisition.  ! was able to simplify the example even more by taking out Qt and writing to the console window.  See the attached file for the new code.
Here are the results of executing the code:
Acquisition width: 1280
Acquisition height: 1024
Total acquisition frames: 30
Bytes per pixel: 1
Acquisition In Progress: 1
Waiting for first frame
Cur Frame: -1
Cur Frame Count: 0
Cur Buffer: -1
Cur Frame: -1
Cur Frame Count: 0
Cur Buffer: -1
Cur Frame: -1
Cur Frame Count: 0
Cur Buffer: -1
Cur Frame: -1
Cur Frame Count: 0
Cur Buffer: -1
Cur Frame: -1
Cur Frame Count: 0
Cur Buffer: -1
Cur Frame: -1
Cur Frame Count: 0
Cur Buffer: -1
I had to stop the execution of the application because it wasn't getting any frames at all.  As you can see I was able to get the bytes per pixel and also see that the acquisition in progress was true.  However there are no frames or buffers being captured.  What else can I try for a test?  The strange thing is that the LLGrab sample application still works after I modify camera parameters.  I can't see any differences in the function calls or order of functions or compile and build settings.
Thanks,
-brian
Attachments:
mainwindow.cpp ‏5 KB