/// <summary>
/// 预览桌面
/// </summary>
private void PreviewDesktop()
{
if (PreviewPlayer.IsRunning)
{
PreviewPlayer.SignalToStop();
PreviewPlayer.WaitForStop();
}
Rectangle screenArea = Rectangle.Empty;
screenArea = Rectangle.Union(screenArea, System.Windows.Forms.Screen.PrimaryScreen.Bounds);
var streamVideo = new ScreenCaptureStream(screenArea);
//当前屏幕的宽高比
var index1 = Math.Round((screenArea.Width * 1.0 / screenArea.Height * 1.0), 2);
var width = Convert.ToInt32(Math.Round(CameraStackpanel.Width));
var height = Convert.ToInt32(Math.Round(CameraStackpanel.Height));
//预览播放器的宽高比
var index2 = Math.Round((width * 1.0 / height * 1.0), 2);
if (index1 > index2)
{
PreviewPlayer.Width = width;
PreviewPlayer.Height = CommonHelper.GetHeight(screenArea.Width, screenArea.Height, width);
}
else
{
PreviewPlayer.Width = CommonHelper.GetWidth(screenArea.Width, screenArea.Height, height);
PreviewPlayer.Height = height;
}
PreviewPlayer.VideoSource = streamVideo;
PreviewPlayer.Start();
}
/// <summary>
/// 预览摄像头
/// </summary>
private void PreviewCamera()
{
if (PreviewPlayer.IsRunning)
{
PreviewPlayer.SignalToStop();
PreviewPlayer.WaitForStop();
}
var camera = VideoHelper.GetCameraInfo(cameraName);
if (camera != null)
{
cameraResolutionIndex = VideoHelper.GetCameraResolutionIndex();
camera.VideoResolution = camera.VideoCapabilities[cameraResolutionIndex];
//当前摄像头分辨率的宽高比
var index1 = Math.Round((camera.VideoResolution.FrameSize.Width * 1.0 / camera.VideoResolution.FrameSize.Height * 1.0), 2);
var width = Convert.ToInt32(Math.Round(CameraStackpanel.Width));
var height = Convert.ToInt32(Math.Round(CameraStackpanel.Height));
//预览播放器的宽高比
var index2 = Math.Round((width * 1.0 / height * 1.0), 2);
if (index1 > index2)
{
PreviewPlayer.Width = width;
PreviewPlayer.Height = CommonHelper.GetHeight(camera.VideoResolution.FrameSize.Width,
camera.VideoResolution.FrameSize.Height, width);
}
else
{
PreviewPlayer.Width = CommonHelper.GetWidth(camera.VideoResolution.FrameSize.Width, camera.VideoResolution.FrameSize.Height, height);
PreviewPlayer.Height = height;
}
PreviewPlayer.VideoSource = camera;
PreviewPlayer.Start();
}
else
{
MessageBox.Show("错误的摄像头设置", "提示");
}
}