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//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
}
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