Question

我有一组声音片段一个接一个地播放，序列中间有几个时间间隔。就我而言，这是一个问题 - 接下来是四个选项。

当我编写下面的代码时，所有的audop文件同时启动。如何在中间有时间延迟，以便第二个剪辑仅在第一个剪辑结束后播放，而第三个剪辑仅在第二个选项结束时开始播放。

我使用的是Flex AIR AS 3.请参阅下面的代码。提前谢谢。

    private function playCoundClips(): void
    {
            //set audio clips

            var questionClipSource : String = "assets/quiz_voiceovers/" + questionCode + "Q.mp3";

            var optionAClipSource : String = "assets/quiz_voiceovers/" + questionCode + "a.mp3";
            var optionBClipSource : String = "assets/quiz_voiceovers/" + questionCode + "b.mp3";
            var optionCClipSource : String = "assets/quiz_voiceovers/" + questionCode + "c.mp3";
            var optionDClipSource : String = "assets/quiz_voiceovers/" + questionCode + "d.mp3";

            playThisClip(questionClipSource);

            playThisClip(optionAClipSource);
            playThisClip(optionBClipSource);

            playThisClip(optionCClipSource);
            playThisClip(optionDClipSource);

    } 


    private function playThisClip(clipPath : String) : void
    {
        try
        {
            clipPlayingNow = true;
            var soundReq:URLRequest = new URLRequest(clipPath); 
            var sound:Sound = new Sound(); 
            var soundControl:SoundChannel = new SoundChannel(); 

            sound.load(soundReq); 
            soundControl = sound.play(0, 0);
        }
        catch(err: Error)
        {
            Alert.show(err.getStackTrace());
        }
    }

由于萨米特

Answer 1

问题是你正在产生多个异步调用。在Sound上实现完整的回调函数，然后在回调函数中调用playThisClip函数。（你可以在打电话前预定时间睡觉）

Answer 2

这对我有帮助 http://livedocs.adobe.com/flex/3/html/help.html?content=Working_with_Sound_09.html

需要为以下代码编写代码：

sound.addEventListener(Event.ENTER_FRAME, onEnterFrame);
soundControl.addEventListener(Event.SOUND_COMPLETE, onPlaybackComplete);

private function onEnterFrame(event:Event):void
{
var estimatedLength:int =       
    Math.ceil(sound.length / (sound.bytesLoaded / sound.bytesTotal));

var playbackPercent:uint = 
    Math.round(100 * (soundControl.position / estimatedLength));

}

private function onPlaybackComplete(event:Event):void 
{
    Alert.show("Hello!");
}

Answer 3

时间延迟，是非常糟糕的主意（在99％的情况下）。查看SOUND_COMPLETE事件（请参阅doc）声音停止播放时会触发此事件。所以，现在很容易按顺序播放声音。一个简单的例子（未经测试，但想法在这里）：

//declare somewhere a list of sounds to play
var sounds:Array=["sound_a.mp3","sound_a.mp3"];//sounds paths

//this function will play all sounds in the sounds parameter
function playSounds(sounds:Array):void{
  if(!sounds || sounds.length==0){
     //no more sound to play
     //you could dispatch an event here
     return;
  }
  var sound:Sound=new Sound();
  sound.load(new URLRequest(sounds.pop()));
  var soundChannel:SoundChannel = sound.play();
  soundChannel.addEVentListener(Event.SOUND_COMPLETE,function():void{
     soundChannel.removeEventListener(Event.SOUND_COMPLETE,arguments.callee);   
     playSounds(sounds);
  });
}

在flex AIR代码中一个接一个地播放声音文件

3 个答案: