Viewing a video’s metadata using a Spark VideoPlayer control in Flex 4

The following example shows how you can detect when the metadata is received by a Spark VideoPlayer control in Flex 4 by listening for the metadataReceived event.

The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 trial, see http://www.adobe.com/products/flex/. To download the latest nightly build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4.
For more information on getting started with Flex 4 and Flash Builder 4, see the official Adobe Flex Team blog.

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/05/11/viewing-a-videos-metadata-using-a-spark-videoplayer-control-in-flex-gumbo/ -->
<s:Application name="Spark_VideoPlayer_metadataReceived_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/halo">

    <fx:Script>
        <![CDATA[
            import mx.utils.ObjectUtil;
            import spark.events.VideoEvent;

            private function videoPlayer_metadataReceived(evt:VideoEvent):void {
                debug.text = ObjectUtil.toString(evt.metadataInfo);
            }
        ]]>
    </fx:Script>

    <s:HGroup horizontalCenter="0" verticalCenter="0">
        <s:VideoPlayer id="videoPlayer"
                source="http://helpexamples.com/flash/video/cuepoints.flv"
                muted="true"
                metadataReceived="videoPlayer_metadataReceived(event);" />

        <s:TextArea id="debug"
                editable="false"
                height="{videoPlayer.height}" />
    </s:HGroup>

</s:Application>

View source is enabled in the following example.

Due to popular demand, here is the “same” example in a more ActionScript friendly format:

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/05/11/viewing-a-videos-metadata-using-a-spark-videoplayer-control-in-flex-gumbo/ -->
<s:Application name="Spark_VideoPlayer_metadataReceived_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/halo"
        initialize="init();">

    <fx:Script>
        <![CDATA[
            import mx.events.ResizeEvent;
            import mx.utils.ObjectUtil;
            import spark.components.HGroup;
            import spark.components.TextArea;
            import spark.components.VideoPlayer;
            import spark.events.VideoEvent;

            private var videoPlayer:VideoPlayer;
            private var debug:TextArea;

            private function init():void {
                videoPlayer = new VideoPlayer();
                videoPlayer.source = "http://helpexamples.com/flash/video/cuepoints.flv";
                videoPlayer.muted = true;
                videoPlayer.addEventListener(VideoEvent.METADATA_RECEIVED, videoPlayer_metadataReceived);
                videoPlayer.addEventListener(ResizeEvent.RESIZE, videoPlayer_resize);

                debug = new TextArea();
                debug.editable = false;

                var hGr:HGroup = new HGroup();
                hGr.horizontalCenter = 0;
                hGr.verticalCenter = 0;
                hGr.addElement(videoPlayer);
                hGr.addElement(debug);
                addElement(hGr);
            }

            private function videoPlayer_resize(evt:ResizeEvent):void {
                debug.height = videoPlayer.height;
            }

            private function videoPlayer_metadataReceived(evt:VideoEvent):void {
                debug.text = ObjectUtil.toString(evt.metadataInfo);
            }
        ]]>
    </fx:Script>

</s:Application>

This entry is based on a beta version of the Flex 4 SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex 4 SDK.