private async void btAddInputFile_Click(object sender, EventArgs e) { if (OpenDialog1.ShowDialog() == DialogResult.OK) { VideoEdit1.Video_FrameRate = Convert.ToDouble(cbFrameRate.Text); // resize if required int customWidth = 0; int customHeight = 0; if (cbResize.Checked) { customWidth = Convert.ToInt32(edWidth.Text); customHeight = Convert.ToInt32(edHeight.Text); } foreach (var s in OpenDialog1.FileNames) { lbFiles.Items.Add(s); if ((string.Compare(GetFileExt(s), ".BMP", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".JPG", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".JPEG", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".GIF", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".PNG", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".TIF", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".TIFF", StringComparison.OrdinalIgnoreCase) == 0)) { await VideoEdit1.Input_AddImageFileAsync(s, TimeSpan.FromMilliseconds(2000), null, VideoEditStretchMode.Letterbox, 0, customWidth, customHeight); } else if ((string.Compare(GetFileExt(s), ".WAV", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".MP3", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".OGG", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".AAC", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".M4A", StringComparison.OrdinalIgnoreCase) == 0) || (string.Compare(GetFileExt(s), ".WMA", StringComparison.OrdinalIgnoreCase) == 0)) { var audioFile = new AudioSource(s, null, null, string.Empty, 0, 1.0); await VideoEdit1.Input_AddAudioFileAsync(audioFile, null, 0); } else { var audioFile = new AudioSource(s, null, null, s, 0, 1.0); var videoFile = new VideoSource(s, null, null, VideoEditStretchMode.Letterbox, 0, 1.0); await VideoEdit1.Input_AddVideoFileAsync(videoFile, null, 0, customWidth, customHeight); await VideoEdit1.Input_AddAudioFileAsync(audioFile, null, 0); } } } }