如何获得mp3曲目的持续时间?

问题描述

我想问一下如何在应用程序中获取音频文件的长度.

I would like to ask how can I get length of my audio file in app.

我正在加载这样的曲目

var installFolder = Windows.ApplicationModel.Package.Current.InstalledLocation;

var resourcesFolder = await installFolder.GetFolderAsync("Resources");
var mp3FilesFolder = await resourcesFolder.GetFolderAsync("mp3Files");

var audioFile = await mp3FilesFolder.GetFileAsync("sound.mp3");
var stream = await audioFile.OpenAsync(Windows.Storage.FileAccessMode.Read);

mediaplayer.SetSource(stream, audioFile.ContentType);
mediaplayer.Play();

但是我不知道如何获得曲目的持续时间?

but I don't know how to get the duration of track?

推荐答案

有两种获取曲目持续时间的方法:

There are two ways to get the duration of the track:

• 首先是直接从文件的音乐属性中读取它通过使用 GetMusicPropertiesAsync():

• first is to read it directly from file's MusicProperties by using GetMusicPropertiesAsync():

   var audioFile = await mp3FilesFolder.GetFileAsync("sound.mp3");
   MusicProperties properties = await audioFile.Properties.GetMusicPropertiesAsync();
   TimeSpan myTrackDuration = properties.Duration;

• 第二个选项是从 MediaElement 或 BackgroundMediaPlayer
获取其 NaturalDuration

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