duration (Sound.duration property) -- Flash CS3

The following example loads a sound and displays the duration of the sound file in the Output panel. Add the following ActionScript to your FLA or AS file.

var my_sound:Sound = new Sound();
my_sound.onLoad = function(success:Boolean) {
    var totalSeconds:Number = this.duration/1000;
    trace(this.duration+" ms ("+Math.round(totalSeconds)+" seconds)");
    var minutes:Number = Math.floor(totalSeconds/60);
    var seconds = Math.floor(totalSeconds)%60;
    if (seconds<10) {
    seconds = "0"+seconds;
    }
    trace(minutes+":"+seconds);
};
my_sound.loadSound("song1.mp3", true);

The following example loads several songs into a SWF file. A progress bar, created using the Drawing API, displays the loading progress. When the music starts and completes loading, information displays in the Output panel. Add the following ActionScript to your FLA or AS file.

var pb_height:Number = 10;
var pb_width:Number = 100;
var pb:MovieClip = this.createEmptyMovieClip("progressBar_mc", this.getNextHighestDepth());
pb.createEmptyMovieClip("bar_mc", pb.getNextHighestDepth());
pb.createEmptyMovieClip("vBar_mc", pb.getNextHighestDepth());
pb.createEmptyMovieClip("stroke_mc", pb.getNextHighestDepth());
pb.createTextField("pos_txt", pb.getNextHighestDepth(), 0, pb_height, pb_width, 22);

pb._x = 100;
pb._y = 100;

with (pb.bar_mc) {
    beginFill(0x00FF00);
    moveTo(0, 0);
    lineTo(pb_width, 0);
    lineTo(pb_width, pb_height);
    lineTo(0, pb_height);
    lineTo(0, 0);
    endFill();
    _xscale = 0;
}
with (pb.vBar_mc) {
    lineStyle(1, 0x000000);
    moveTo(0, 0);
    lineTo(0, pb_height);
}
with (pb.stroke_mc) {
    lineStyle(3, 0x000000);
    moveTo(0, 0);
    lineTo(pb_width, 0);
    lineTo(pb_width, pb_height);
    lineTo(0, pb_height);
    lineTo(0, 0);
}

var my_interval:Number;
var my_sound:Sound = new Sound();
my_sound.onLoad = function(success:Boolean) {
    if (success) {
    trace("sound loaded");
    }
};
my_sound.onSoundComplete = function() {
    clearInterval(my_interval);
    trace("Cleared interval");
}
my_sound.loadSound("song3.mp3", true);
my_interval = setInterval(updateProgressBar, 100, my_sound);

function updateProgressBar(the_sound:Sound):Void {
    var pos:Number = Math.round(the_sound.position/the_sound.duration*100);
    pb.bar_mc._xscale = pos;
    pb.vBar_mc._x = pb.bar_mc._width;
    pb.pos_txt.text = pos+"%";
}

The MovieClip.getNextHighestDepth() method used in this example requires Flash Player 7 or later. If your SWF file includes a version 2 component, use the version 2 components' DepthManager class instead of the MovieClip.getNextHighestDepth() method.

Comments

No screen name said on Apr 17, 2008 at 3:53 PM :

The duration property of the Sound object isn't loaded inmediately. It is loaded when the loading process finishes, when the loading process is completed. So all the examples that involve this property don`t work as expected. You should have previous knowledge of the duration of the sound and hardcode it. This is not clear until the bandwith profiler is used, or loading an mp3 file located in a remote site, because if you just test the examples with a local file it seems as if they work.

duration (Sound.duration property)

Example

See also

Comments