如何获得mp3曲目的持续时间？

Question

我想问一下如何在app中获取我的音频文件的长度.

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();

但我不知道如何获得赛道的持续时间？

Answer 1

有两种方法可以获得曲目的持续时间:

• 首先是使用GetMusicPropertiesAsync()直接从文件的MusicProperties中读取它:

   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