C# VLC播放视频实现布满在控件上

VLC的C#库：https://github.com/ZeBobo5/Vlc.DotNet
使用VLC播放视频时，有时候视频尺寸与播放的控件大小不一样，导致有黑的边框，如下图所示：

这个问题，在Issue区也有人提出过：https://github.com/ZeBobo5/Vlc.DotNet/issues/652
现解决方案如下：

internal class VLCPlayer
    {
     
        const string VLC_LIB_DIRECTORY = @".\VLC";
        private VlcMediaPlayer vlcMediaPlayer;
        private bool isPlaying = false;//标识是否已经播放，用于没有播放时能够重新播放
        public VLCPlayer()
        {
     
            string vlcLibPath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, VLC_LIB_DIRECTORY);
            var options = new string[] {
      ":avcodec-hw=any", "--rtsp-tcp", "--network-caching=300", };
            vlcMediaPlayer = new VlcMediaPlayer(new System.IO.DirectoryInfo(vlcLibPath),options);
            vlcMediaPlayer.Playing += VlcMediaPlayer_Playing;
        }

        private void VlcMediaPlayer_Playing(object sender, VlcMediaPlayerPlayingEventArgs e)
        {
     
            isPlaying = true;
            SetAspectRatio(vlcMediaPlayer.VideoHostControlHandle);
        }

        public void Play(string url, IntPtr handle)
        {
     
            isPlaying = false;
            vlcMediaPlayer.VideoHostControlHandle = handle;
            var control = FindControl(handle);
            control.SizeChanged -= Control_SizeChanged;
            control.SizeChanged += Control_SizeChanged;
            vlcMediaPlayer.Play(new Uri(url));
            //检测是否在播放，没有播放就重复播放
            Task.Factory.StartNew((x) =>
            {
     
                Thread.Sleep(3000);
                if (isPlaying) return;

                string l = x as string;
                for (int i = 0; i < 5; i++)
                {
     
                    if (!isPlaying)
                    {
     
                        vlcMediaPlayer.Play(new Uri(l));
                        Thread.Sleep(5000);
                    }
                    else
                    {
     
                        break;
                    }
                }

            },url);
        }

        private void Control_SizeChanged(object sender, EventArgs e)
        {
     
            SetAspectRatio(vlcMediaPlayer.VideoHostControlHandle);
        }

        /// 

        /// 通过句柄找到窗体
        /// 
        /// 
        /// 
        private System.Windows.Forms.Control FindControl(IntPtr handle)
        {
     
            return System.Windows.Forms.Form.FromHandle(handle);
        }
        /// 

        /// 设置视频的宽高比
        /// 
        /// 
        private void SetAspectRatio(IntPtr handle)
        {
     
            var control = FindControl(handle);
            vlcMediaPlayer.Video.AspectRatio = $"{control.Width}:{control.Height}";

        }
        public void Pause()
        {
     
            vlcMediaPlayer.Pause();
        }
        public void Stop()
        {
     
            vlcMediaPlayer.Stop();
        }
    }