上传视频并转换为flv,抓取第一帧生面图片

最新推荐文章于 2025-09-01 19:08:03 发布

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最新推荐文章于 2025-09-01 19:08:03 发布

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CC 4.0 BY-SA版权

文章标签： ffmpeg 数据库 ui

原文链接：http://www.cnblogs.com/weichuo/archive/2008/11/25/1340554.html

本文介绍了一种使用FFmpeg和mencoder进行音视频文件转换的方法，包括配置项、转换流程及图片抓取等功能。适用于不同路径下的文件处理。

---源码下载----

WEB.config配置节如下

< appSettings >

         
         < add key = " ffmpeg " value = " ffmpeg/ffmpeg.exe " />
         < add key = " mencoder " value = " mencoder/mencoder.exe " />
         < add key = " mplayer " value = " mencoder/mplayer.exe " />
         
         < add key = " upfile " value = " UpFiles " />
         
         < add key = " imgfile " value = " ImgFile " />
         
         < add key = " CatchFlvImgSize " value = " 240x180 " />
         < add key = " widthSize " value = " 400 " />
         < add key = " heightSize " value = " 350 " />
         
         < add key = " playfile " value = " PlayFiles " />

     </ appSettings >

上传类：

namespace VideoToFLV
{
     public class PublicMethod:System.Web.UI.Page
    {
           public PublicMethod()
    {

    }
     // 文件路径
     public static string ffmpegtool = ConfigurationManager.AppSettings[ " ffmpeg " ];
     public static string mencodertool = ConfigurationManager.AppSettings[ " mencoder " ];
     public static string mplayertool = ConfigurationManager.AppSettings[ " mplayer " ];
     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
     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 string 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:\51aspx\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_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
        {
             return "" ;
        }
         //
         return "" ;
    }
     //
     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 "" ;
        }
         //
         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 string 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:\51aspx\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);
        System.Diagnostics.ProcessStartInfo ImgstartInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);

        FilestartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
        ImgstartInfo.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;
        ImgstartInfo.Arguments = "   -i   " + fileName + "   -y  -f  image2  -t  0.001  -s   " + FlvImgSize + " " + flv_img;

         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;
         /// 此处略去延时代码.如有那位知道如何捕捉ffmpeg.exe截图失败消息,请告知,先谢过!
         if (System.IO.File.Exists(flv_img))
        {
             return flv_img;
        }

         return "" ;
    }
     #endregion

     #region
     // 运行mencoder的视频解码器转换(这里是(绝对路径))
     public string 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.Start(FilestartInfo);
            CatchImg(flv_file, imgFile);
        }
         catch
        {
             return "" ;
        }
         //
         return "" ;
    }
     #endregion

    }
}

转载于:https://www.cnblogs.com/weichuo/archive/2008/11/25/1340554.html