AudioElement causes an error in Flex 4

Question

Greetings,
A few days ago Ryan and Brian helped me to patch the problem wtih importing video into Flex by using the 'loadForCompatibility' flag.
This morning I ran into similar problem with audio: the SWF that uses simplest OSMF player plays fine in the Flash CS5 and in the standalone FlashPlayer. Once I import the SWF into Flex 4, even with the SWFLoader flag 'loadForCompatibility' set to 'true', I get this error:
Here is the code for the simplest audio player class (by the way, for some unclear reasons getter/setter didn't work, so for the test case I had to set the variable as 'public' ):
package
import flash.display.Sprite;
import org.osmf.media.MediaPlayer;
import org.osmf.media.URLResource;
import org.osmf.elements.AudioElement;
public class LightAudioElement extends Sprite
public var audioPlayer:MediaPlayer;
public function LightAudioElement(aSource:String)
var resource:URLResource = new URLResource(aSource);
var audioElement:AudioElement = new AudioElement(resource);
audioPlayer = new MediaPlayer();
audioPlayer.media = audioElement;
audioPlayer.autoRewind = true;
And here is the code for the SWF:
import LightAudioElement;
import flash.events.MouseEvent;
var snd:LightAudioElement = new LightAudioElement('assets/Test.mp3');
snd.audioPlayer.autoPlay = false;
//Standard Button component dragged on the stage for this quick test
sndBtn.addEventListener(MouseEvent.CLICK, clickHandler);
function clickHandler(event:MouseEvent):void
if(snd.audioPlayer.playing)
snd.audioPlayer.stop();
else
snd.audioPlayer.play();
Once again, it works fine in both Flash CS5 and standalone FlashPlayer, but produces an error in Flex 4. I'm on OS X 10.6.3, the Flex SDK 4.0
Thanks in advance for any suggestions,
FTQuest

Answer 1

Hi,
First, and foremost. As Brian Riggs - who is ultimate authority on the subject - has said:
I'd advise against replacing Flex's OSMF.swc with the latest one.  The reason is that the Flex SDK integrates with OSMF APIs from a much earlier sprint, and in the latest OSMF SWC many of these APIs don't exist anymore (due to renaming).
And that's what I take seriously.
Yet, out of curiosity, and for the sake of exploration I took my chances and did replace the version of the OSMF that is shipped with the Flex 4.0 release with the latest - 0.95.
So far, all the functionality that I need - single player, multiple players, compiled in Flash, compiled in Flex, playing in synch, or alternating - seems working fine, including access to various events.
Let me repeat: this is NOT a suggestion; just mere sharing of experience, and it comes at a cost - you should use your versions of video player, i.e. built in that latest version of OSMF. The Spark VideoPlayer (or VideoDisplay) give you compile time error I mentioned before - TimeDimension.
Just FYI,
FTQuest