VideoConvert.cs

using System.Web;
using System.Configuration;

//if (this.fload.HasFile)
//{
//    string upFileName = HttpContext.Current.Server.MapPath("~/savefile") + "\\" + this.fload.PostedFile.FileName;
//    string saveName   = DateTime.Now.ToString("yyyyMMddHHmmssffff");
//    string playFile   = Server.MapPath(VideoConvert.savefile + saveName);
//    string imgFile    = Server.MapPath(VideoConvert.savefile + saveName);

//    VideoConvert pm = new VideoConvert();
//    string m_strExtension = VideoConvert.GetExtension(this.fload.PostedFile.FileName).ToLower();
//    if (m_strExtension == "flv")
//    {
//        System.IO.File.Copy(upFileName, playFile + ".flv");
//        pm.CatchImg(upFileName, imgFile);
//    }
//    string Extension = pm.CheckExtension(m_strExtension);
//    if (Extension == "ffmpeg")
//    {
//        pm.ChangeFilePhy(upFileName, playFile, imgFile);
//    }
//    else if (Extension == "mencoder")
//    {
//        pm.MChangeFilePhy(upFileName, playFile, imgFile);
//    }
//}
public class VideoConvert : System.Web.UI.Page
{
    public VideoConvert()
    { }

    string[] strArrMencoder = new string[] { "wmv", "rmvb", "rm" };
    string[] strArrFfmpeg = new string[] { "asf", "avi", "mpg", "3gp", "mov" };

    #region 配置
    public static string ffmpegtool = ConfigurationManager.AppSettings["ffmpeg"];
    public static string mencodertool = ConfigurationManager.AppSettings["mencoder"];
    public static string savefile = ConfigurationManager.AppSettings["savefile"] + "/";
    public static string sizeOfImg = ConfigurationManager.AppSettings["CatchFlvImgSize"];
    public static string widthOfFile = ConfigurationManager.AppSettings["widthSize"];
    public static string heightOfFile = ConfigurationManager.AppSettings["heightSize"];
    #endregion

    #region 获取文件的名字
    /// <summary>
    /// 获取文件的名字
    /// </summary>
    public static string GetFileName(string fileName)
    {
        int i = fileName.LastIndexOf("\\") + 1;
        string Name = fileName.Substring(i);
        return Name;
    }
    #endregion

    #region 获取文件扩展名
    /// <summary>
    /// 获取文件扩展名
    /// </summary>
    public static string GetExtension(string fileName)
    {
        int i = fileName.LastIndexOf(".") + 1;
        string Name = fileName.Substring(i);
        return Name;
    }
    #endregion

    #region 获取文件类型
    /// <summary>
    /// 获取文件类型
    /// </summary>
    public string CheckExtension(string extension)
    {
        string m_strReturn = "";
        foreach (string var in this.strArrFfmpeg)
        {
            if (var == extension)
            {
                m_strReturn = "ffmpeg"; break;
            }
        }
        if (m_strReturn == "")
        {
            foreach (string var in strArrMencoder)
            {
                if (var == extension)
                {
                    m_strReturn = "mencoder"; break;
                }
            }
        }
        return m_strReturn;
    }
    #endregion

    #region 视频格式转为Flv
    /// <summary>
    /// 视频格式转为Flv
    /// </summary>
    /// <param name="vFileName">原视频文件地址</param>
    /// <param name="ExportName">生成后的Flv文件地址</param>
    public bool ConvertFlv(string vFileName, string ExportName)
    {
        if ((!System.IO.File.Exists(ffmpegtool)) || (!System.IO.File.Exists(HttpContext.Current.Server.MapPath(vFileName))))
        {
            return false;
        }
        vFileName = HttpContext.Current.Server.MapPath(vFileName);
        ExportName = HttpContext.Current.Server.MapPath(ExportName);
        string Command = " -i \"" + vFileName + "\" -y -ab 32 -ar 22050 -b 800000 -s  480*360 \"" + ExportName + "\""; //Flv格式     
        System.Diagnostics.Process p = new System.Diagnostics.Process();
        p.StartInfo.FileName = ffmpegtool;
        p.StartInfo.Arguments = Command;
        p.StartInfo.WorkingDirectory = HttpContext.Current.Server.MapPath("~/tools/");
        p.StartInfo.UseShellExecute = false;
        p.StartInfo.RedirectStandardInput = true;
        p.StartInfo.RedirectStandardOutput = true;
        p.StartInfo.RedirectStandardError = true;
        p.StartInfo.CreateNoWindow = false;
        p.Start();
        p.BeginErrorReadLine();
        p.WaitForExit();
        p.Close();
        p.Dispose();
        return true;
    }
    #endregion

    #region 生成Flv视频的缩略图
    /// <summary>
    /// 生成Flv视频的缩略图
    /// </summary>
    /// <param name="vFileName">视频文件地址</param>
    public string CatchImg(string vFileName)
    {
        if ((!System.IO.File.Exists(ffmpegtool)) || (!System.IO.File.Exists(HttpContext.Current.Server.MapPath(vFileName)))) return "";
        try
        {
            string flv_img_p = vFileName.Substring(0, vFileName.Length - 4) + ".jpg";
            string Command = " -i " + HttpContext.Current.Server.MapPath(vFileName) + " -y -f image2 -t 0.1 -s " + sizeOfImg + " " + HttpContext.Current.Server.MapPath(flv_img_p);
            System.Diagnostics.Process p = new System.Diagnostics.Process();
            p.StartInfo.FileName = ffmpegtool;
            p.StartInfo.Arguments = Command;
            p.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
            try
            {
                p.Start();
            }
            catch
            {
                return "";
            }
            finally
            {
                p.Close();
                p.Dispose();
            }
            System.Threading.Thread.Sleep(4000);

            //注意:图片截取成功后,数据由内存缓存写到磁盘需要时间较长,大概在3,4秒甚至更长;
            if (System.IO.File.Exists(HttpContext.Current.Server.MapPath(flv_img_p)))
            {
                return flv_img_p;
            }
            return "";
        }
        catch
        {
            return "";
        }
    }
    #endregion

    #region 运行FFMpeg的视频解码(绝对路径)
    /// <summary>
    /// 转换文件并保存在指定文件夹下
    /// </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 string ChangeFilePhy(string fileName, string playFile, string imgFile)
    {
        string ffmpeg = Server.MapPath(VideoConvert.ffmpegtool);
        if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(fileName)))
        {
            return "";
        }
        string flv_file = System.IO.Path.ChangeExtension(playFile, ".flv");
        string FlvImgSize = VideoConvert.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;
        try
        {
            System.Diagnostics.Process.Start(FilestartInfo);//转换
            CatchImg(fileName, imgFile); //截图
        }
        catch
        {
            return "";
        }
        return "";
    }

    public string CatchImg(string fileName, string imgFile)
    {
        string ffmpeg = Server.MapPath(VideoConvert.ffmpegtool);
        string flv_img = imgFile + ".jpg";
        string FlvImgSize = VideoConvert.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 "";
        }
        if (System.IO.File.Exists(flv_img))
        {
            return flv_img;
        }
        return "";
    }
    #endregion

    #region 运行FFMpeg的视频解码(相对路径)
    /// <summary>
    /// 转换文件并保存在指定文件夹下
    /// </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 string ChangeFileVir(string fileName, string playFile, string imgFile)
    {
        string ffmpeg = Server.MapPath(VideoConvert.ffmpegtool);
        if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(fileName)))
        {
            return "";
        }
        string flv_img = System.IO.Path.ChangeExtension(Server.MapPath(imgFile), ".jpg");
        string flv_file = System.IO.Path.ChangeExtension(Server.MapPath(playFile), ".flv");
        string FlvImgSize = VideoConvert.sizeOfImg;

        System.Diagnostics.ProcessStartInfo ImgstartInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);
        ImgstartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
        ImgstartInfo.Arguments = "   -i   " + fileName + "   -y   -f   image2   -t   0.001   -s   " + FlvImgSize + "   " + flv_img;

        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;
        try
        {
            System.Diagnostics.Process.Start(FilestartInfo);
            System.Diagnostics.Process.Start(ImgstartInfo);
        }
        catch
        {
            return "";
        }

        ///注意:图片截取成功后,数据由内存缓存写到磁盘需要时间较长,大概在3,4秒甚至更长;   
        ///这儿需要延时后再检测,我服务器延时8秒,即如果超过8秒图片仍不存在,认为截图失败;    
        if (System.IO.File.Exists(flv_img))
        {
            return flv_img;
        }
        return "";
    }
    #endregion

    #region 运行mencoder的视频解码器转换(绝对路径)
    /// <summary>
    /// 运行mencoder的视频解码器转换
    /// </summary>
    public string MChangeFilePhy(string vFileName, string playFile, string imgFile)
    {
        string tool = Server.MapPath(VideoConvert.mencodertool);
        if ((!System.IO.File.Exists(tool)) || (!System.IO.File.Exists(vFileName)))
        {
            return "";
        }
        string flv_file = System.IO.Path.ChangeExtension(playFile, ".flv");
        string FlvImgSize = VideoConvert.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.Start(FilestartInfo);
            CatchImg(flv_file, imgFile);
        }
        catch
        {
            return "";
        }
        return "";
    }
    #endregion
}