The following example shows how you can display an FLV file with alpha channel transparency in an MX VideoDisplay control in Flex 3 by setting the backgroundAlpha style to 0.
Full code after the jump.
<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2010/01/21/displaying-a-semi-transparent-flv-file-in-an-mx-videodisplay-control-in-flex/ --> <mx:Application name="VideoDisplay_backgroundAlpha_test" xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" backgroundGradientColors="[#FF0000,#0000FF]"> <mx:VideoDisplay id="vidDisp" source="walking.flv" backgroundAlpha="0.0" width="80%" height="80%" horizontalCenter="0" verticalCenter="0" complete="event.currentTarget.play();"/> </mx:Application>
The walking.flv can be found at the “Introducing True Alpha Video in Flash 8″ article in the Adobe Flash Developer Center.
