Enable smoothing on VideoDisplay

Question

Hi,
When playback a video in Flex air application, the video looks pixel and the edges is not smooth. I have do some searching for example, but all examples are for Flex 3 with MX videodisplay, not spark videodisplay. I tried it and I get the error message "Error exist in the project: SWF Loader". I don't have SWF loader in that project.
Here is my code:
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
                       xmlns:s="library://ns.adobe.com/flex/spark"
                       xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:custom="custom.*">
    <fx:Script>
        <![CDATA[
            import mx.controls.Alert;
            import org.osmf.events.TimeEvent;
            protected function videodisplay1_completeHandler(event:TimeEvent):void
                Alert.show("The Video Playback completed.");
        ]]>
    </fx:Script>
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <!--<s:VideoDisplay source="video/00_02_setup.mov" complete="videodisplay1_completeHandler(event)" right="0" left="0" top="0" bottom="0"/>-->
    <custom:SmoothVideoDisplay source="video/00_02_setup.mov" smoothing="true"/>
</s:WindowedApplication>
package custom { 
    import mx.controls.VideoDisplay;
    import mx.core.mx_internal;
    use namespace mx_internal;
    public class SmoothVideoDisplay extends VideoDisplay
        private var _smoothing:Boolean = false;
        public function SmoothVideoDisplay()
            super();
        [Bindable]
        public function set smoothing(val:Boolean):void{
            if (val == _smoothing) return;
            _smoothing = val;
            videoPlayer.smoothing = _smoothing;
        public function get smoothing():Boolean{
            return _smoothing;
How can I solve the problem?  How can I have the good video quality playback in flex? Thanks.

Answer 1

See this article to improve the scaled video quality in flex by enabling the smoothing property. Here the videoDisplay component is extended to expose the smoothing and deblocking property.
http://askmeflash.com/tutorial/8/how-to-smooth-resized-video-in-videodisplay-component