C# 给视频添加水印

 public static void Run(string cmd)        {            try            {                string ffmpeg = AppDomain.CurrentDomain.BaseDirectory + "ffmpeg.exe";                ProcessStartInfo startInfo = new ProcessStartInfo(ffmpeg);                startInfo.UseShellExecute = false;                startInfo.CreateNoWindow = true;                startInfo.WindowStyle = ProcessWindowStyle.Hidden;                startInfo.Arguments = cmd;                Process process = Process.Start(startInfo);                process.WaitForExit(3000);                process.Kill();            }            catch { }        } /// <summary>        /// 按时间获取某帧图片        /// </summary>        /// <param name="videoPath">视频路径</param>        /// <param name="outPath">输出路径</param>        /// <param name="frameTime">时间(格式：00:00:01)</param>        public static void GetFrame(string videoPath, string outPath, string frameTime)        {            Run(string.Format("-ss 00:00:01 -i {1} {2}", frameTime, videoPath, outPath));        }
        /// <summary>        /// 批量添加图片水印        /// </summary>        /// <param name="videoPath"></param>        /// <param name="outPath"></param>        /// <param name="listImg"></param>        public static void AddImageMark(string videoPath, string outPath, List<ImgMark> listImg)        {            string imgs = "", postions = "";            foreach (ImgMark mark in listImg)            {                imgs += " -i " + mark.ImgPath;                postions += "overlay=" + mark.Postion.X + ":" + mark.Postion.Y+",";            }            postions = postions.Remove(postions.Length - 1);            Run(string.Format("-i {0}{1} -filter_complex \"{2}\" {3}", videoPath, imgs, postions, outPath));        }
        /// <summary>        /// 添加文字水印        /// </summary>        /// <param name="videoPath">视频路径</param>        /// <param name="outPath">输出路径</param>        /// <param name="textMark">水印属性</param>        public static void AddTextMark(string videoPath, string outPath, TextMark textMark)        {            Run(string.Format(" -i {0}  -vf \"drawtext=fontfile={1}: text='{2}':x={3}:y={4}:fontsize={5}:fontcolor={6}\" {7}", videoPath, textMark.FontFile, textMark.Text, textMark.X, textMark.Y, textMark.FontSize, textMark.FontColor.Name.ToLower(), outPath));            //@"%{localtime\:%Y\-%m\-%d %H-%M-%S}"        }

   private void btn_select_Click(object sender, EventArgs e)        {            OpenFileDialog ofd = new OpenFileDialog();            ofd.Filter = "视频|*.mp4;*.avi";            ofd.Title = "请选择视频文件";            ofd.InitialDirectory = Application.StartupPath;            if (ofd.ShowDialog() == DialogResult.OK)            {                axWindowsMediaPlayer1.URL = ofd.FileName;            }        }
        private void btn_text_Click(object sender, EventArgs e)        {            if (!File.Exists(axWindowsMediaPlayer1.URL))            {                MessageBox.Show("未选择视频");                return;            }            SaveFileDialog sfd = new SaveFileDialog();            sfd.Filter = "视频|*.mp4";            sfd.AddExtension = true;            if (sfd.ShowDialog() == DialogResult.OK)            {                TextMark mark = new TextMark                {                    Text = "这里是水印",                    FontColor = Color.Red,                    FontFile = "simsun.ttc",                    FontSize = 100,                    X = 80,                    Y = 60                };                FFmpegUtil.AddTextMark(axWindowsMediaPlayer1.URL, sfd.FileName, mark);                axWindowsMediaPlayer2.URL = sfd.FileName;            }        }
        private void btn_img_Click(object sender, EventArgs e)        {            if (!File.Exists(axWindowsMediaPlayer1.URL))            {                MessageBox.Show("未选择视频");                return;            }            SaveFileDialog sfd = new SaveFileDialog();            sfd.Filter = "视频|*.mp4";            sfd.AddExtension = true;            if (sfd.ShowDialog() == DialogResult.OK)            {                FFmpegUtil.AddImageMark(axWindowsMediaPlayer1.URL, sfd.FileName, new List<ImgMark>{                    new ImgMark {                    ImgPath=@"C:\Users\Zero\Desktop\a\\1.png",                   Postion=new Point(60,60)},                    new ImgMark {ImgPath=@"C:\Users\Zero\Desktop\a\\1.png",             Postion=new Point(60,200)}});                axWindowsMediaPlayer2.URL = sfd.FileName;            }        }