/// <summary> /// 提取音频事件 /// </summary> private async void ExecuteExtractAudioCommand() { if (isExtracting) { eventAggregator.GetEvent <MessageEvent>().Publish(DictionaryResource.GetString("TipWaitTaskFinished")); return; } if (VideoPath == "") { eventAggregator.GetEvent <MessageEvent>().Publish(DictionaryResource.GetString("TipNoSeletedVideo")); return; } // 音频文件名 string audioFileName = VideoPath.Remove(VideoPath.Length - 4, 4) + ".aac"; Status = string.Empty; await Task.Run(() => { // 执行提取音频程序 isExtracting = true; FFmpegHelper.ExtractAudio(VideoPath, audioFileName, new Action <string>((output) => { Status += output + "\n"; })); isExtracting = false; }); }