AS3(flash)获取MP3音频文件的比特率

来源：互联网发布：气象数据质量控制编辑：程序博客网时间：2024/05/29 16:48

基本的算法是：【码率】（kbps)=【文件大小】（字节）X8/【时间】（秒）/1024

package{import flash.display.Sprite;import flash.events.Event;import flash.events.MouseEvent;import flash.media.Sound;import flash.net.FileFilter;import flash.net.FileReference;public class GetMp3BitRateDemo extends Sprite{private var _fileRefer:FileReference;public function GetMp3BitRateDemo(){stage.addEventListener(MouseEvent.CLICK,onClick);}private function onClick(e:MouseEvent):void{_fileRefer = new FileReference();_fileRefer.addEventListener(Event.SELECT,onSelect);_fileRefer.addEventListener(Event.COMPLETE,onComplete);_fileRefer.browse([new FileFilter("Images (*.mp3)", "*.mp3")]);}private function onSelect(e:Event):void{_fileRefer.load();//本地加载}private function onComplete(e:Event):void{if(!_fileRefer || !_fileRefer.data)return;var mp3:Sound =  new Sound();mp3.loadCompressedDataFromByteArray(_fileRefer.data,_fileRefer.data.length);var bitRate:Number =  Math.round((_fileRefer.size * 8) / (mp3.length/1000) / 1024);trace("bitrate == " + bitRate);_fileRefer.cancel();_fileRefer = null;}}}

Enjoy it.

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