Quinn Buchanan created FLEX-34437:
-------------------------------------
Summary: Underlying Components of Spark:VideoDisplay control enter
invalid state after losing focus
Key: FLEX-34437
URL: https://issues.apache.org/jira/browse/FLEX-34437
Project: Apache Flex
Issue Type: Bug
Components: Spark: VideoPlayer
Affects Versions: Apache Flex 4.12.1, Apache Flex 4.12.0, Apache Flex 4.13.0
Environment: Windows 8.1 x64 8GB I7 IntelliJ, Flex 4.12.1
Mac OS X 10.9, 4GB I5 Intellij Flex 4.12.1
Reporter: Quinn Buchanan
When using the spark:VideoDisplay control in Flex versions above 12.0, with
stage video fix applied:
OSMFSettings.enableStageVideo = false;
an error is received once the video player is minimized, hidden, or loses focus
for a period of time. It appears that one of the components enters and invalid
state ( OSMF?) and reports a state of loading / buffering even though video is
finished. When cleanup is run or new source added the error listed below
occurs. Workaround is to manually clear the video when the screen is hidden /
transitions - code snippet provided below that may help.
Error / Exception Received:
TypeError: Error #1009: Cannot access a property or method of a null object
reference.
at org.osmf.media::MediaPlayer/getTraitOrThrow()
at org.osmf.media::MediaPlayer/play()
at Function/<anonymous>()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at org.osmf.media::MediaPlayer/updateTraitListeners()
at org.osmf.media::MediaPlayer/onTraitRemove()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at org.osmf.media::MediaElement/setLocalTrait()
at org.osmf.media::MediaElement/removeTrait()
at org.osmf.elements::LightweightVideoElement/processUnloadingState()
at org.osmf.media::LoadableElementBase/onLoadStateChange()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at org.osmf.traits::LoadTrait/loadStateChangeEnd()
at org.osmf.traits::LoadTrait/setLoadState()
at org.osmf.traits::LoadTrait/onLoadStateChange()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at org.osmf.traits::LoaderBase/updateLoadTrait()
at org.osmf.net::NetLoader/executeUnload()
at org.osmf.traits::LoaderBase/unload()
at org.osmf.traits::LoadTrait/unload()
at org.osmf.media::MediaPlayer/set media()
at
spark.components::VideoDisplay/setUpSource()[/Users/aharui/flex-sdk-4.12.1/frameworks/projects/spark/src/spark/components/VideoDisplay.as:1717]
at spark.components::VideoDisplay/set
source()[/Users/aharui/flex-sdk-4.12.1/frameworks/projects/spark/src/spark/components/VideoDisplay.as:1081]
at
view.activities::FullScreenVideo/setupFromContentMap()[C:\Users\Quinn\projects\dpa\DPA\workspace\dapApplication\src\view\activities\FullScreenVideo.mxml:32]
at view.components::ActivityBase/set
contentMap()[C:\Users\Quinn\projects\dpa\DPA\workspace\dapApplication\src\view\components\ActivityBase.as:83]
at
view::ContentView/handleShowScreen()[C:\Users\Quinn\projects\dpa\DPA\workspace\dapApplication\src\view\ContentView.mxml:86]
at
view::ContentView/___ContentView_State10_enterState()[C:\Users\Quinn\projects\dpa\DPA\workspace\dapApplication\src\view\ContentView.mxml:128]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
Code Snippet with workaround: ( hope it doesn't look as nasty as it does in the
entry box )
protected override function setupFromContentMap(map:Object):void {
super.setupFromContentMap(map);
if (map != null) {
// not sure I like how they have this setup
if( videoPlayer.source != null )
{
videoPlayer.stopAllMovieClips();
}
if (playVideoInstruction.video != null) {
videoPlayer.source = playVideoInstruction.video;
nextButton.visible = false;
}
if (playVideoInstruction.screenText != null) {
screenText = playVideoInstruction.screenText;
if (screenText.length > 0) {
textBkg.visible = true;
textArea.visible = true;
try {
textArea.textFlow =
TextFlowUtil.importFromString(screenText);
}
catch (e:Error) {
// need to popup something telling you the error
textArea.text = "Text Formating Error: " +
e.message;
}
}
else {
textBkg.visible = false;
textArea.visible = false;
}
}
else {
textBkg.visible = false;
textArea.visible = false;
}
}
else {
}
}
protected function videoPlayer_completeHandler(event:TimeEvent):void {
// TODO Auto-generated method stub
nextButton.visible = true;
}
protected override function nextButton_onClicked( me:MouseEvent ):void
{
// uncomment next two lines to work around issue
// videoPlayer.stopAllMovieClips();
// videoPlayer.source = null;
super.nextButton_onClicked(me);
}
]]></fx:Script>
<!--<s:BitmapImage id="videoBkg" x="81" y="79" width="100%" height="100%"
source="{AssetLibrary.FLV_PLACEHOLDER}" />-->
<s:BorderContainer top="52" left="0" right="0" bottom="64"
backgroundColor="black" borderVisible="false">
<s:VideoDisplay id="videoPlayer" width="100%" height="100%"
scaleMode="letterbox" autoRewind="false"
complete="videoPlayer_completeHandler(event)"/>
</s:BorderContainer>
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