上传视频并转换为flv,抓取第一帧生面图片

---源码下载----

WEB.config配置节如下

<appSettings>

<!--工具文件夹-->

<add key="ffmpeg" value="ffmpeg/ffmpeg.exe"/>

<add key="mencoder" value="mencoder/mencoder.exe"/>

<add key="mplayer" value="mencoder/mplayer.exe"/>

<!--上传文件的路径-->

<add key="upfile" value="UpFiles"/>

<!--上专文件图片路径-->

<add key="imgfile" value="ImgFile"/>

<!--上传文件图片大小-->

<add key="CatchFlvImgSize" value="240x180"/>

<add key="widthSize" value="400"/>

<add key="heightSize" value="350"/>

<!--转换后文件路径-->

<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

}

}