文章描述：以下主要还是使用到了ffmpeg命令，分别实现了给视频添加图片水印以及文字水印。

开发环境：.NET Framework版本：4.5

开发工具： Visual Studio 2013

实现代码：

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;}}

实现效果：

代码解析：着重介绍下添加文字水印的，由于很多时候我们需要添加的是中文，所以需要将字体包先放入到ffmepg的同级目录，然后指定该字体。

所有源代码均会上传并持续更新，如有需要

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