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	/// <summary>
	/// 摄像头回调
	/// </summary>
	/// <param name="sender"></param>
	/// <param name="eventArgs"></param>
	private void Camera_NewFrame(object sender, NewFrameEventArgs eventArgs)
	{
		**_this.VideoWriter.WriteVideoFrame((Bitmap)eventArgs.Frame.Clone());//抛出异常的地方_**

		//每100帧回收一次虚拟内存
		if ((TotalFrame++) % 100 == 0)
		{
			WindowApi.ClearMemory();
		}
	}

{"A video file was not opened yet."}

在 AForge.Video.FFMPEG.VideoFileWriter.WriteVideoFrame(Bitmap frame, TimeSpan timestamp)
在 AForge.Video.FFMPEG.VideoFileWriter.WriteVideoFrame(Bitmap frame)
在 Kogel.Record.CameraRecorder.Camera_NewFrame(Object sender, NewFrameEventArgs eventArgs) 位置 C:\Users\Administrator\Desktop\新任务\Kogel.Record-master\Kogel.Record-master\Kogel.Record\CameraRecorder.cs:行号 139
在 AForge.Video.DirectShow.VideoCaptureDevice.OnNewFrame(Bitmap image)
在 AForge.Video.DirectShow.VideoCaptureDevice.Grabber.BufferCB(Double sampleTime, IntPtr buffer, Int32 bufferLen)