c# - 是否可以在共享托管服务器中使用 `ffmpeg.exe`？

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我用 ffmpeg.exe将视频文件转换为 flv但它不适用于共享主机。
是否可以使用 ffmpeg在共享主机中？
这是我的代码:

 private bool ReturnVideo(string fileName)
    {
        string html = string.Empty;
        //rename if file already exists

        int j = 0;
        string AppPath;
        string inputPath;
        string outputPath;
        string imgpath;
        AppPath = Request.PhysicalApplicationPath;
        //Get the application path
        inputPath = AppPath + "OriginalVideo";
        //Path of the original file
        outputPath = AppPath + "ConvertVideo";
        //Path of the converted file
        imgpath = AppPath + "Thumbs";
        //Path of the preview file
        string filepath = Server.MapPath("~/OriginalVideo/" + fileName);
        while (File.Exists(filepath))
        {
            j = j + 1;
            int dotPos = fileName.LastIndexOf(".");
            string namewithoutext = fileName.Substring(0, dotPos);
            string ext = fileName.Substring(dotPos + 1);
            fileName = namewithoutext + j + "." + ext;
            filepath = Server.MapPath("~/OriginalVideo/" + fileName);
        }
            this.fileuploadImageVideo.SaveAs(filepath);
        string outPutFile;
        outPutFile = "~/OriginalVideo/" + fileName;
        int i = this.fileuploadImageVideo.PostedFile.ContentLength;
        System.IO.FileInfo a = new System.IO.FileInfo(Server.MapPath(outPutFile));
        while (a.Exists == false)
        {

        }
        long b = a.Length;
        while (i != b)
        {

        }


        string cmd = " -i \"" + inputPath + "\\" + fileName + "\" \"" + outputPath + "\\" + fileName.Remove(fileName.IndexOf(".")) + ".flv" + "\"";
        ConvertNow(cmd);
        string imgargs = " -i \"" + outputPath + "\\" + fileName.Remove(fileName.IndexOf(".")) + ".flv" + "\" -f image2 -ss 1 -vframes 1 -s 280x200 -an \"" + imgpath + "\\" + fileName.Remove(fileName.IndexOf(".")) + ".jpg" + "\"";
        ConvertNow(imgargs);


        return true;
    }
    private void ConvertNow(string cmd)
    {
        string exepath;
        string AppPath = Request.PhysicalApplicationPath;
        //Get the application path
        exepath = AppPath + "ffmpeg.exe";
        System.Diagnostics.Process proc = new System.Diagnostics.Process();
        proc.StartInfo.FileName = exepath;
        //Path of exe that will be executed, only for "filebuffer" it will be "flvtool2.exe"
        proc.StartInfo.Arguments = cmd;
        //The command which will be executed
        proc.StartInfo.UseShellExecute = false;
        proc.StartInfo.CreateNoWindow = true;
        proc.StartInfo.RedirectStandardOutput = false;
        proc.Start();

        while (proc.HasExited == false)
        {

        }
    }

Answer 1

您不能实例化 System.Diagnostics.Process对象，除非您在 FullTrust 上运行。

This class contains a link demand and an inheritance demand at the class level that applies to all members. A SecurityException is thrown when either the immediate caller or the derived class does not have full-trust permission.

通常托管服务提供商不允许共享主机上的应用程序在完全信任下运行。有关更多详细信息，请联系您的支持人员，或者只是在服务器上运行您的代码。

要更改信任级别，请在 web.config 中设置

<trust level="Full" originUrl=""/>