/// <summary>
/// だいたい0.3秒おきの動画サムネイルを取得する
/// </summary>
/// <param name="videoPath">ビデオファイルパス</param>
/// <returns></returns>
public static IEnumerable <Bitmap> GetThumbnails(string videoPath)
{
// メタ情報で再生時間取得
var ffprob = new NReco.VideoInfo.FFProbe();
var info = ffprob.GetMediaInfo(videoPath);
var duration = info.Duration;
var videoConv = new NReco.VideoConverter.FFMpegConverter();
// 最短0.3秒おき、最大100分割
var skipSec = duration.TotalSeconds < 30 ?
0.3f : (float)(duration.TotalSeconds / 100);
var frameSec = 0f;
while ((float)duration.TotalSeconds > frameSec)
{
// Bitmapリソースは受信側で開放する。
var jpegStream = new MemoryStream();
videoConv.GetVideoThumbnail(videoPath, jpegStream, frameSec);
yield return((Bitmap)Image.FromStream(jpegStream));
frameSec += skipSec;
}
}
private void BtnConvert_Click(object sender, EventArgs e)
{
this.btnBrowse.Enabled = false;
this.btnConvert.Enabled = false;
this.btnDestination.Enabled = false;
this.listAudio.Items.Clear();
int i = 0;
this.lblCurrentFile.Visible = true;
this.pbProgress.Visible = true;
this.listVideo.Visible = true;
this.listAudio.Visible = true;
this.pbTotalProgress.Visible = true;
this.pbProgress.Maximum = 100;
this.pbTotalProgress.Maximum = 100;
this.totalItem = this.listVideo.Items.Count;
this.pbTotalProgress.Value = 0;
this.processedItem = 0;
foreach (string file in this.input)
{
try
{
this.pbProgress.Value = 0;
this.processedItem = i + 1;
//var item = this.listVideo.Items[i];
//string outputFile = item.ToString();
var outputFile = Path.GetFileNameWithoutExtension(file); //outputFile.Substring(0, outputFile.LastIndexOf('.'));
this.lblCurrentFile.Text = "Converting: " + file;
var ConvertToAudio = new NReco.VideoConverter.FFMpegConverter();
var ffprobe = new NReco.VideoInfo.FFProbe();
MediaInfo videoInfo = ffprobe.GetMediaInfo(file);
this.totalSeconds = videoInfo.Duration.Milliseconds;
ConvertToAudio.ConvertProgress += new EventHandler <ConvertProgressEventArgs>(this.UpdateProgress);
ConvertToAudio.ConvertMedia(file, this.txtAudio.Text + "\\" + outputFile + ".mp3", "mp3");
this.listAudio.Items.Add(this.txtAudio.Text + "\\" + outputFile + ".mp3");
i++;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
i++;
}
}
this.lblCurrentFile.Text = "Completed";
this.btnBrowse.Enabled = true;
this.btnConvert.Enabled = true;
this.btnDestination.Enabled = true;
}