Vlc.DotNet.Forms.VlcControl cc = new Vlc.DotNet.Forms.VlcControl();
cc.Width = 500;
cc.Height = 400;
cc.Top = 100;
cc.Left = 100;
Vlc.DotNet.Core.Medias.MediaBase media = new Vlc.DotNet.Core.Medias.LocationMedia("dshow:// ");
media.AddOption(":dshow-size=1600*1200");
media.AddOption(":dshow-vdev=USB CAM2");
cc.Play(media);
this.Controls.Add(cc);
cc.BringToFront();
//cc.TakeSnapshot("D:\\111.jpg", 1600, 1200);//截图