c#上传视频,生成视频缩略图

青年才俊
  • 263

以下代码运行后老提示"连接被重置

载入页面时到服务器的连接被重置。",想调试都没办法,请大神帮我看看,谢谢!
WebForm7.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm7.aspx.cs" Inherits="WTS_Digital.Admin.WebForm7" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
         <asp:FileUpload ID="FileUpload1" runat="server" />
        <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click1" />
    </div>
    </form>
</body>
</html>

////////////////////////////////////////////////////////////////////////////////
WebForm7.aspx.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WTS_Digital.Admin
{
    public partial class WebForm7 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }


        /// <summary>
        /// 上传视频生成缩略图
        /// </summary>
        /// <param name="vFileName"></param>
        /// <param name="SmallPic"></param>
        /// <returns></returns>
        public string CatchImg(string vFileName)
        {
            try
            {
                string ffmpeg = "ffmpeg.exe";
                ffmpeg = Server.MapPath(ffmpeg);
                string aaa = System.Web.HttpContext.Current.Server.MapPath(vFileName);
                if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(System.Web.HttpContext.Current.Server.MapPath(vFileName))))
                {
                    return "";
                }
                //获得图片相对路径/最后存储到数据库的路径,如:/Web/FlvFile/User1/00001.jpg
                string flv_img = System.IO.Path.ChangeExtension(vFileName, ".jpg");
                //图片绝对路径,如:D:\Video\Web\FlvFile\User1\0001.jpg
                string flv_img_p = Server.MapPath("/uploadfile/1.jpg");
                //截图的尺寸大小,配置在Web.Config中,如:<add key="CatchFlvImgSize" value="140x110" /> 
                string FlvImgSize = "140x110";
                System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);
                startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
                //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
                startInfo.Arguments = " -i " + Server.MapPath(vFileName) + " -y -f image2 -t 0.1 -s " + FlvImgSize + " " + flv_img_p;
                try
                {
                    System.Diagnostics.Process.Start(startInfo);
                }
                catch
                {
                    return "";
                }
                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(flv_img_p))
                {
                    return flv_img_p.Replace(Server.MapPath("~/"), ""); ;
                }
                return "";
            }
            catch
            {
                return "";
            }
        }

        /// <summary>
        /// 上传视频生成缩略图
        /// </summary>
        /// <param name="vFileName"></param>
        /// <param name="SmallPic"></param>
        /// <returns></returns>
        public string CatchImg1(string vFileName)
        {
            try
            {
                string ffmpeg = "/ffmpeg.exe";
                ffmpeg = Server.MapPath(ffmpeg);
                if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(Server.MapPath(vFileName))))
                {
                    return "";
                }
                string flv_img = System.IO.Path.ChangeExtension(vFileName, ".jpg");
                string flv_img_p = Server.MapPath(flv_img);
                string FlvImgSize = "140x110";
                System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);
                startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
                startInfo.Arguments = " -i " + Server.MapPath(vFileName) + " -y -f image2 -t 0.1 -s " + FlvImgSize + " " + flv_img_p;
                try
                {
                    System.Diagnostics.Process.Start(startInfo);
                }
                catch
                {
                    return "";
                }
                System.Threading.Thread.Sleep(4000);
                if (System.IO.File.Exists(flv_img_p))
                {
                    return flv_img_p.Replace(Server.MapPath("~/"), ""); ;
                }
                return "";
            }
            catch
            {
                return "";
            }
        }

        protected void Button1_Click1(object sender, EventArgs e)
        {
            string imgfileExp = this.FileUpload1.PostedFile.FileName.Substring(this.FileUpload1.PostedFile.FileName.LastIndexOf(".") + 1);
            string filename = "11223344";
            string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);                      //文件名称
            string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName).ToLower();      //文件的后缀名(小写)

            if (imgfileExp.ToLower() == "flv" || imgfileExp.ToLower() == "mp4" || imgfileExp.ToLower() == "wmv")
            {
                Response.Write("uploadfile\\" + filename + "." + imgfileExp);
                this.FileUpload1.PostedFile.SaveAs(Server.MapPath("uploadfile") + "\\" + fileName);
                string ffmpeg = Server.MapPath("ffmpeg.exe");//E:\视频缩略图测试\html
                string filenames = Server.MapPath("uploadfile") + "\\" + filename + "." + imgfileExp;

                CatchImg1("/uploadfile/" + fileName);//可以使用经过整理

            }
        }
    }
}
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