適用於iOS的AS3 AIR - StageVideo無法正常工作

Question

我想讓StageVideo在我的應用程序中工作，但我遇到了問題。 我需要一個接一個地播放一系列視頻，第一個視頻總是播放正常，但其他視頻只播放音頻，StageVideo將顯示第一個視頻的最后一幀。

這就好像StageVideo已經凍結並正在播放視頻但我看不到它（只聽到它）。 我在這里發布了完整的代碼：

我正在使用Adobe Air 3.2 beta在iPad2上進行測試，但也測試了3.1和相同的結果。

這是我的視頻課程：

package  {

    import flash.display.MovieClip;
    import flash.text.TextField;
    import flash.text.TextFormat;
    import flash.events.Event;
    import flash.media.StageVideo;
    import flash.events.StageVideoEvent;
    import flash.events.StageVideoAvailabilityEvent;
    import flash.media.StageVideoAvailability;
    import flash.net.NetStream;
    import flash.net.NetConnection;
    import flash.geom.Rectangle;
    import flash.events.NetStatusEvent;

    public class SVideo2 extends MovieClip {

        public static const VIDEO_FINISHED:String = 'videoFinished';

        private var debugPanel:TextField;
        private var addedToStage:Boolean = false;

        private var videoFile:String;

        private var hwaEnabled:Boolean = false;

        private var video:StageVideo;
        private var ns:NetStream;
        private var nc:NetConnection;

        public function SVideo2() {
            addDebugPanel();

            addEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
        }

        private function onAddedToStage(e:Event) :void{
            output('ADDED TO STAGE');
            addedToStage = true;
            stage.addEventListener(StageVideoAvailabilityEvent.STAGE_VIDEO_AVAILABILITY, onAvail);
            removeEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
        }

        public function playVideo(videoFile:String) :void{
            output('playVideo: '+videoFile);
            if(addedToStage){
                this.videoFile = videoFile;
                if(hwaEnabled){
                    startPlaying();
                }
                else{
                    output('HWA NOT AVAILABLE');
                }
            }
            else{
                output('NOT ON STAGE');
            }
        }

        private function onAvail(e:StageVideoAvailabilityEvent) :void{
            output(e.availability);
            if(e.availability == StageVideoAvailability.AVAILABLE){
                output('VIDEO AVAILABLE');
                hwaEnabled = true;
            }
        }

        private function startPlaying() :void{
            output('STARTING TO PLAY');
            video = stage.stageVideos[0];
            video.addEventListener(StageVideoEvent.RENDER_STATE, onRender);

            nc = new NetConnection();
            nc.connect(null);
            ns = new NetStream(nc);

            ns.addEventListener(NetStatusEvent.NET_STATUS, onNetStatus);

            ns.client = this;

            video.attachNetStream(ns);
            ns.play(videoFile);
        }

        private function onRender(e:StageVideoEvent) :void{
            output('onRender');
            video.viewPort = new Rectangle(192, 50, 640, 480);
        }

        private function onNetStatus(e:NetStatusEvent) :void{
            output(e.info.code);
            if(e.info.code == 'Netstream.Play.Stop'){
                output('VIDEO STOPPED');
                dispatchEvent(new Event(VIDEO_FINISHED));
            }
        }

        private function addDebugPanel() :void{
            var tFormat:TextFormat = new TextFormat('Arial', 14, 0x000000, true);
            var tField:TextField = new TextField();

            tField.setTextFormat(tFormat);
            tField.multiline = true;
            tField.border = true;
            tField.borderColor = 0x000000;
            tField.background = true;
            tField.backgroundColor = 0xFFFFFF;

            tField.x = 0;
            tField.y = 568;
            tField.width = 1024;
            tField.height = 200;

            this.debugPanel = tField;
            addChild(debugPanel);
        }

        private function output(what:String) :void{
            debugPanel.appendText("\n"+what);
        }

        public function onXMPData(info:Object) :void{}
        public function onMetaData(info:Object) :void{}
        public function onCuePoint(info:Object) :void{}
        public function onPlayStatus(info:Object) :void{}

    }

}

這是我在框架中使用的代碼：

import flash.display.Sprite;
import flash.events.MouseEvent;

var vid:SVideo2 = new SVideo2();
addChild(vid);

var btn:Sprite = new Sprite();
btn.graphics.beginFill(0x333333);
btn.graphics.drawRect(0, 0, 100, 40);
btn.x = 462;
btn.y = 518;
btn.width = 100;
btn.height = 40;

addChild(btn);

btn.addEventListener(MouseEvent.CLICK, onClick);

function onClick(e:MouseEvent) :void{
    var rand:String = String(Math.floor(Math.random() * 37));
    vid.playVideo('mp4/result_'+rand+'.mp4');
}

Answer 1

在與這個bug斗爭並完全重寫代碼后，我發現原因是因為我沒有清除附加到StageVideo的netStream引用，即; StageVideo.attachNetStream(null) ;

這需要在播放每個新視頻之前/之后清除。

在第二次調用attachNetStream（）之前，調用當前連接的NetStream對象的close（）方法。 調用close（）會釋放播放視頻所涉及的所有資源，包括硬件解碼器。 然后，您可以使用另一個NetStream對象或null調用attachNetStream（）。

• http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/media/StageVideo.html#attachNetStream%28%29

Answer 2

你設置backgroundAlpha = 0？ - > s：應用backgroundAlpha = 0