C＃Windows窗体从嵌入的Windows Media Player中捕获图像

我有一个用C＃编写的Windows窗体应用程序，它使用嵌入式Windows Media Player（AxInterop.WMPLib.dll和WMPLib.dll）播放一些video文件。 现在我需要添加一个选项，以便在按钮点击时从video中捕获图像。 如果我将无窗口选项设置为true，我可以捕获video图像，但是当我将无窗口选项设置为true时，我在某些计算机上看不到video图像。 如果没有无窗口选项，我只会使用以下代码获得黑屏：

System.Drawing.Image ret = null; try{ Bitmap bitmap = new Bitmap(wmPlayer.Width-26, wmPlayer.Height-66); { Graphics g = Graphics.FromImage(bitmap); { Graphics gg = wmPlayer.CreateGraphics(); { this.BringToFront(); g.CopyFromScreen( wmPlayer.PointToScreen( new System.Drawing.Point()).X+13, wmPlayer.PointToScreen( new System.Drawing.Point()).Y, 0, 0, new System.Drawing.Size( wmPlayer.Width-26, wmPlayer.Height-66) ); } } using (MemoryStream ms = new MemoryStream()){ bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png); ret = System.Drawing.Image.FromStream(ms); ret.Save(@"C:\\WMP_capture.png"); pictureBox1.Image=ret; } } bitmap.Dispose(); }catch (Exception){ } 

如何在没有C＃的无窗口选项的情况下从嵌入式Windows Media Player中播放的video中捕获帧（快照）？

或者是否有任何其他C＃窗体的video播放器可以轻松实现并支持捕获function。

Answer 1

希望此代码适合您

 if (!string.IsNullOrEmpty(axWindowsMediaPlayer1.URL)){ axWindowsMediaPlayer1.Ctlcontrols.pause(); System.Drawing.Image ret = null; try { // take picture BEFORE saveFileDialog pops up!! Bitmap bitmap = new Bitmap(axWindowsMediaPlayer1.Width, axWindowsMediaPlayer1.Height); { Graphics g = Graphics.FromImage(bitmap); { Graphics gg = axWindowsMediaPlayer1.CreateGraphics(); { //timerTakePicFromVideo.Start(); this.BringToFront(); g.CopyFromScreen( axWindowsMediaPlayer1.PointToScreen( new System.Drawing.Point()).X, axWindowsMediaPlayer1.PointToScreen( new System.Drawing.Point()).Y, 0, 0, new System.Drawing.Size( axWindowsMediaPlayer1.Width, axWindowsMediaPlayer1.Height) ); } } // afterwards save bitmap file if user wants to if (saveFileDialog1.ShowDialog() == DialogResult.OK) { using (MemoryStream ms = new MemoryStream()) { bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png); ret = System.Drawing.Image.FromStream(ms); ret.Save(saveFileDialog1.FileName); } } } } catch (Exception ex) { Debug.WriteLine(ex.Message); } 

}

还有一个演示： http ： //www.codeproject.com/Articles/34663/DirectShow-Examples-for-Using-SampleGrabber-for-Gr