/// <summary> /// 提取视频事件 /// </summary> private async void ExecuteExtractVideoCommand() { if (isExtracting) { eventAggregator.GetEvent <MessageEvent>().Publish(DictionaryResource.GetString("TipWaitTaskFinished")); return; } if (VideoPath == "") { eventAggregator.GetEvent <MessageEvent>().Publish(DictionaryResource.GetString("TipNoSeletedVideo")); return; } // 视频文件名 string videoFileName = VideoPath.Remove(VideoPath.Length - 4, 4) + "_onlyVideo.mp4"; Status = string.Empty; await Task.Run(() => { // 执行提取视频程序 isExtracting = true; FFmpegHelper.ExtractVideo(VideoPath, videoFileName, new Action <string>((output) => { Status += output + "\n"; })); isExtracting = false; }); }