隨著越來越多的人采用了最新的Windows操作系統，Microsoft Media Foundation正在迅速抬頭。自LEADTOOLS V18發布以來， Media Foundation SDK便受到越來越多客戶的親睞。

LEADTOOLS v18包含了眾多能處理核心多媒體功能的控件，如播放，捕獲和轉換等，此外，還包含一些視頻和音頻的特殊處理功能。LEADTOOLS中最流行、最靈活的轉換就是視頻轉換回調，允許你直接訪問原始視頻數據。

下列代碼顯示播放視頻文件并將幀作為JPEG保存至磁盤：

// Initialize the Callback Transform after setting up the play control
private void AddCallback(object pCallback)
{
if (lmvCallBkPlay == null)
{
playCtrl1.SelectedVideoProcessors.Add(playCtrl1.VideoProcessors.Callback);
lmvCallBkPlay = playCtrl1.GetSubObject(Leadtools.MediaFoundation.PlayObject.SelVideoProcessor) as LMFVCallback;
lmvCallBkPlay.ReceiveProcObj = pCallback;
fCallbackFilterInserted = true;
}
else
{
lmvCallBkPlay.ReceiveProcObj = pCallback;
fCallbackFilterInserted = true;
}
}

// Code for the Callback Transform
public class LEADCallbackPlay : ILMVUserCallback2
{
public LEADCallbackPlay(){ }
~LEADCallbackPlay(){}

public void ReceiveProc(long pData, int lWidth, int lHeight, int lBitCount, int lSize, int bTopDown)
{
Bitmap bmp = new Bitmap(lWidth, lHeight, lBitCount / 8 * lWidth, System.Drawing.Imaging.PixelFormat.Format32bppRgb, new IntPtr(pData));
bmp.Save("Still_bitmap.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
}
}