/// <summary>
/// 获取HTML文件，如果不存在，则动态生成HTML文件,并判断文件有效时间，过期则重新生成
/// </summary>
/// <param name="mPage"></param>
/// <param name="AspxFile"></param>
/// <param name="HtmlFile"></param>
/// <param name="Hour"></param>
/// <returns></returns>
public static string GetPageHtml(System.Web.UI.Page mPage, string AspxFile, string HtmlFile, int Hour)
{
string strContent = "";
string file = System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "/" + HtmlFile;
if (File.Exists(file) == false)
{
StringWriter sw = new StringWriter();
mPage.Server.Execute(AspxFile, sw);
strContent = sw.ToString();
CFile.CreateFile(HtmlFile, strContent);
}
else
{
if (CFile.IsFileExpired(file, Hour) == false)
{
strContent = CFile.GetFileContent(HtmlFile);
}
else
{
StringWriter sw = new StringWriter();
mPage.Server.Execute(AspxFile, sw);
strContent = sw.ToString();
CFile.CreateFile(HtmlFile, strContent);
}
}
return(strContent);
}
/// <summary>
///新建文件
/// </summary>
/// <param name="filePath">文件虚拟目录+文件名</param>
/// <param name="FileContent">文件内容</param>
public static void CreateFile(string filePath, string FileContent)
{
string file = System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "/" + filePath;
if (File.Exists(file))
{
CFile.DeleteFile(file);
}
StreamWriter sw = new StreamWriter(file, false, Encoding.Default); //GetEncoding("gb2312")
sw.WriteLine(FileContent);
sw.Close();
sw.Dispose();
}
/// @从视频文件截图,生成在视频文件所在文件夹
/// 在Web.Config 中需要两个前置配置项:
/// 1.ffmpeg.exe文件的路径
///
/// 2.截图的尺寸大小
///
/// 3.视频处理程序ffmpeg.exe
///
/// 视频文件地址,如:/Web/FlvFile/User1/00001.Flv
/// 成功:返回图片虚拟地址; 失败:返回空字符串
public string CatchImg(string vFileName, string imgPath)
{
//取得ffmpeg.exe的路径,路径配置在Web.Config中,如:
string ffmpeg = System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "bin/ffmpeg.exe"; //CConfig.GetValueByKey("ffmpeg");
if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(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 imgName = CFun.Create12ID() + CFile.GetFileName(flv_img);
string flv_img_p = imgPath + "/" + imgName;
//截图的尺寸大小,配置在Web.Config中,如:
string FlvImgSize = CConfig.GetValueByKey("CatchFlvImgSize");
System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);
startInfo.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
startInfo.Arguments = " -i " + vFileName + " -y -f image2 -t 0.001 -s " + FlvImgSize + " " + flv_img_p;
try
{
System.Diagnostics.Process.Start(startInfo);
}
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!
while (System.IO.File.Exists(flv_img_p) == false)
{
Thread.Sleep(2000);
}
return(imgName);
//if (System.IO.File.Exists(flv_img_p))
//{
// return imgName;
//}
// return "";
}
