通过ffmpeg从flv视频文件中截图代码,CSharp代码库,德仔网

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【CSharp】通过ffmpeg从flv视频文件中截图
作者:阿凡卢 / 发布于2014/4/10/ 824
通过ffmpeg从flv视频文件中截图
///C#通过ffmpeg从flv视频文件中截图的代码，需要先下载ffmpeg

using System;
using System.Configuration;

public class PublicMethod:System.Web.UI.Page
{
  public PublicMethod()
  {
    
  }
  //文件路径 ，http://www.sharejs.com
  public static string ffmpegtool = "ffmpeg/ffmpeg.exe";    
  public static string mencodertool = "mencoder/mencoder.exe";
  public static string flvtool = "flvtool/flvtool2.exe";     //flv标记工具

  public static string upFile = "UpFiles" + "/";            //上传文件夹
  public static string imgFile = "ImgFile" + "/";            //图片文件夹
  public static string playFile = "PlayFiles" + "/";          //flv文件夹
  public static string xmlFile = "xmlFiles" + "/";           //xml文件夹

  public static string sizeOfImg = "240x180";           //图片的宽与高
  public static string widthOfFile = "400";            //flv文件的宽度
  public static string heightOfFile = "350";           //flv文件的高度

  //public static string ffmpegtool = ConfigurationManager.AppSettings["ffmpeg"];
  //public static string mencodertool = ConfigurationManager.AppSettings["mencoder"];
  //public static string upFile = ConfigurationManager.AppSettings["upfile"] + "/";
  //public static string imgFile = ConfigurationManager.AppSettings["imgfile"] + "/";
  //public static string playFile = ConfigurationManager.AppSettings["playfile"] + "/";
  //文件图片大小
  //public static string sizeOfImg = ConfigurationManager.AppSettings["CatchFlvImgSize"];
  //文件大小
  //public static string widthOfFile = ConfigurationManager.AppSettings["widthSize"];
  //public static string heightOfFile = ConfigurationManager.AppSettings["heightSize"];

  //  // //获取文件的名字
  private System.Timers.Timer myTimer = new System.Timers.Timer(3000);//记时器
  public static string flvName = "";
  public static string imgName = "";
  public static string flvXml = "";
  public static int pId = 0;
  

  public static string GetFileName(string fileName)
  {
    int i = fileName.LastIndexOf("\") + 1;
    string Name = fileName.Substring(i);
    return Name;
  }
  //获取文件扩展名
  public static string GetExtension(string fileName)
  {
    int i = fileName.LastIndexOf(".")+1;
    string Name = fileName.Substring(i);
    return Name;
  }
  //
  #region //运行FFMpeg的视频解码，(这里是绝对路径)
  /// <summary>
  /// 转换文件并保存在指定文件夹下面(这里是绝对路径)
  /// </summary>
  /// <param name="fileName">上传视频文件的路径（原文件）</param>
  /// <param name="playFile">转换后的文件的路径（网络播放文件）</param>
  /// <param name="imgFile">从视频文件中抓取的图片路径</param>
  /// <returns>成功:返回图片虚拟地址;  失败:返回空字符串</returns>
  public void ChangeFilePhy(string fileName, string playFile, string imgFile)
  {
    //取得ffmpeg.exe的路径,路径配置在Web.Config中,如:<add  key="ffmpeg"  value="E:aspx1ffmpeg.exe"  /> 
    string ffmpeg = Server.MapPath(PublicMethod.ffmpegtool);
    if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(fileName)))
    {
      return;
    }

    //获得图片和(.flv)文件相对路径/最后存储到数据库的路径,如:/Web/User1/00001.jpg 
   
    string flv_file = System.IO.Path.ChangeExtension(playFile, ".flv");


    //截图的尺寸大小,配置在Web.Config中,如:<add  key="CatchFlvImgSize"  value="240x180"  /> 
    string FlvImgSize = PublicMethod.sizeOfImg;

    System.Diagnostics.ProcessStartInfo FilestartInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);

    FilestartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;

    FilestartInfo.Arguments = " -i " + fileName + " -ab 56 -ar 22050 -b 500 -r 15 -s " + widthOfFile + "x" + heightOfFile + " " + flv_file;
    //ImgstartInfo.Arguments = "  -i  " + fileName + "  -y  -f  image2  -t  0.05  -s  " + FlvImgSize + "  " + flv_img;

    try
    {
      //转换
      System.Diagnostics.Process.Start(FilestartInfo);
      //截图
      CatchImg(fileName, imgFile);
      //System.Diagnostics.Process.Start(ImgstartInfo);
    }
    catch
    {
    }
  }
  #endregion

  #region 截图
  public string CatchImg(string fileName,string imgFile)
  {
    //
    string ffmpeg = Server.MapPath(PublicMethod.ffmpegtool);
    //
    string flv_img =imgFile+".jpg";
    //
    string FlvImgSize = PublicMethod.sizeOfImg;
    //
    System.Diagnostics.ProcessStartInfo ImgstartInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);
    ImgstartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
    //
    ImgstartInfo.Arguments = "  -i  " + fileName + " -y -f image2  -ss 2 -vframes 1 -s  " + FlvImgSize + "  " + flv_img;
    try
    {
      System.Diagnostics.Process.Start(ImgstartInfo);
    }
    catch
    {
      return "";
    }
    //
    catchFlvTool(fileName);
    if (System.IO.File.Exists(flv_img))
    {
      return flv_img;
    }

    return "";
  }
  #endregion
  #region //运行FFMpeg的视频解码，(这里是(虚拟)相对路径)
  /// <summary>
  /// 转换文件并保存在指定文件夹下面(这里是相对路径)
  /// </summary>
  /// <param name="fileName">上传视频文件的路径（原文件）</param>
  /// <param name="playFile">转换后的文件的路径（网络播放文件）</param>
  /// <param name="imgFile">从视频文件中抓取的图片路径</param>
  /// <returns>成功:返回图片虚拟地址;  失败:返回空字符串</returns>
  public void ChangeFileVir(string fileName, string playFile, string imgFile)
  {
    //取得ffmpeg.exe的路径,路径配置在Web.Config中,如:<add  key="ffmpeg"  value="E:\aspx1\ffmpeg.exe"  /> 
    string ffmpeg = Server.MapPath(PublicMethod.ffmpegtool);
    if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(fileName)))
    {
      return;
    }

    //获得图片和(.flv)文件相对路径/最后存储到数据库的路径,如:/Web/User1/00001.jpg 
    string flv_img = System.IO.Path.ChangeExtension(Server.MapPath(imgFile), ".jpg");
    string flv_file = System.IO.Path.ChangeExtension(Server.MapPath(playFile), ".flv");


    //截图的尺寸大小,配置在Web.Config中,如:<add  key="CatchFlvImgSize"  value="240x180"  /> 
    string FlvImgSize = PublicMethod.sizeOfImg;

    System.Diagnostics.ProcessStartInfo FilestartInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);

    FilestartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
    //此处组合成ffmpeg.exe文件需要的参数即可,此处命令在ffmpeg  0.4.9调试通过
    //ffmpeg -i F:\01.wmv -ab 56 -ar 22050 -b 500 -r 15 -s 320x240 f:\test.flv
    FilestartInfo.Arguments = " -i " + fileName + " -ab 56 -ar 22050 -b 500 -r 15 -s " + widthOfFile + "x" + heightOfFile + " " + flv_file;

    try
    {
      System.Diagnostics.Process ps = new System.Diagnostics.Process();
      ps.StartInfo = FilestartInfo;
      ps.Start();
      Session.Add("ProcessID", ps.Id);
      Session.Add("flv", flv_file);
      Session.Add("img", imgFile);
      myTimer.Elapsed += new System.Timers.ElapsedEventHandler(myTimer_Test);
      myTimer.Enabled = true;
    }
    catch
    {
    }
  }
  #endregion

  #region //运行mencoder的视频解码器转换(这里是(绝对路径))
  public void MChangeFilePhy(string vFileName, string playFile, string imgFile)
  {
    string tool = Server.MapPath(PublicMethod.mencodertool);
    //string mplaytool = Server.MapPath(PublicMethod.ffmpegtool);
    
    if ((!System.IO.File.Exists(tool)) || (!System.IO.File.Exists(vFileName)))
    {
      return;
    }

    string flv_file = System.IO.Path.ChangeExtension(playFile, ".flv");


    //截图的尺寸大小,配置在Web.Config中,如:<add  key="CatchFlvImgSize"  value="240x180"  /> 
    string FlvImgSize = PublicMethod.sizeOfImg;

    System.Diagnostics.ProcessStartInfo FilestartInfo = new System.Diagnostics.ProcessStartInfo(tool);
   
    FilestartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
    FilestartInfo.Arguments = " " + vFileName + " -o " + flv_file + " -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -oac mp3lame -lameopts abr:br=56 -ovc lavc -lavcopts vcodec=flv:vbitrate=200:mbd=2:mv0:trell:v4mv:cbp:last_pred=1:dia=-1:cmp=0:vb_strategy=1 -vf scale=" + widthOfFile + ":" +heightOfFile + " -ofps 12 -srate 22050";
    try
    {
      System.Diagnostics.Process ps = new System.Diagnostics.Process();
      ps.StartInfo = FilestartInfo;
      ps.Start();
      Session.Add("ProcessID", ps.Id);
      Session.Add("flv", flv_file);
      Session.Add("img", imgFile);
      //pId = ps.Id;
      //flvName = flv_file;
      //imgName = imgFile;
      myTimer.Elapsed += new System.Timers.ElapsedEventHandler(myTimer_Test);
      myTimer.Enabled = true;
    }
    catch
    {
    }
  }


  /// <summary>
  /// 记时器功能，自动保存截图
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void myTimer_Test(object sender, System.Timers.ElapsedEventArgs e)
  {
    if (!object.Equals(null, Session["ProcessID"]))
    {
      try
      {
        System.Diagnostics.Process prs = System.Diagnostics.Process.GetProcessById(int.Parse(Session["ProcessID"].ToString()));
        if (prs.HasExited)
        {
          CatchImg(Session["flv"].ToString(), Session["img"].ToString());
          catchFlvTool(Session["flv"].ToString());
          myTimer.Enabled = false;
          myTimer.Close();
          myTimer.Dispose();
          Session.Abandon();
        }
      }
      catch
      {
        CatchImg(Session["flv"].ToString(), Session["img"].ToString());
        catchFlvTool(Session["flv"].ToString());
        myTimer.Enabled = false;
        myTimer.Close();
        myTimer.Dispose();
        Session.Abandon();
      }
    }
  }

  #endregion


  public string catchFlvTool(string fileName)
  {
    //
    string flvtools = Server.MapPath(PublicMethod.flvtool);
    //
    string flv_xml = fileName.Replace(".flv", ".xml").Replace(PublicMethod.upFile.Replace("/", ""), PublicMethod.xmlFile.Replace("/", ""));
    //
    System.Diagnostics.ProcessStartInfo ImgstartInfo = new System.Diagnostics.ProcessStartInfo(flvtools);
    ImgstartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
    //
    ImgstartInfo.Arguments = "  " + fileName + "  -UPx  " + fileName + " > " + flv_xml;
    try
    {
      System.Diagnostics.Process.Start(ImgstartInfo);
    }
    catch
    {
      return "";
    }
    //
    if (System.IO.File.Exists(flv_xml))
    {
      return flv_xml;
    }

    return "";
  }
}
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