调用mmpeg进行各种视频转换代码,CSharp代码库,德仔网

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【CSharp】调用mmpeg进行各种视频转换
作者:Duncan / 发布于2014/11/18/ 609

	using System.Web;
	using System.Configuration;

	namespace DotNet.Utilities
	{
	 public class VideoConvert : System.Web.UI.Page
	 {
	 public VideoConvert()
	 { }

	 string[] strArrMencoder = new string[] { "wmv", "rmvb", "rm" };
	 string[] strArrFfmpeg = new string[] { "asf", "avi", "mpg", "3gp", "mov" };

	 #region 配置
	 public static string ffmpegtool = ConfigurationManager.AppSettings["ffmpeg"];
	 public static string mencodertool = ConfigurationManager.AppSettings["mencoder"];
	 public static string savefile = ConfigurationManager.AppSettings["savefile"] + "/";
	 public static string sizeOfImg = ConfigurationManager.AppSettings["CatchFlvImgSize"];
	 public static string widthOfFile = ConfigurationManager.AppSettings["widthSize"];
	 public static string heightOfFile = ConfigurationManager.AppSettings["heightSize"];
	 #endregion

	 #region 获取文件的名字
	 /// <summary>
	 /// 获取文件的名字
	 /// </summary>
	 public static string GetFileName(string fileName)
	 {
	 int i = fileName.LastIndexOf("\\\\") + 1;
	 string Name = fileName.Substring(i);
	 return Name;
	 }
	 #endregion

	 #region 获取文件扩展名
	 /// <summary>
	 /// 获取文件扩展名
	 /// </summary>
	 public static string GetExtension(string fileName)
	 {
	 int i = fileName.LastIndexOf(".") + 1;
	 string Name = fileName.Substring(i);
	 return Name;
	 }
	 #endregion

	 #region 获取文件类型
	 /// <summary>
	 /// 获取文件类型
	 /// </summary>
	 public string CheckExtension(string extension)
	 {
	 string m_strReturn = "";
	 foreach (string var in this.strArrFfmpeg)
	 {
	 if (var == extension)
	 {
	 m_strReturn = "ffmpeg"; break;
	 }
	 }
	 if (m_strReturn == "")
	 {
	 foreach (string var in strArrMencoder)
	 {
	 if (var == extension)
	 {
	 m_strReturn = "mencoder"; break;
	 }
	 }
	 }
	 return m_strReturn;
	 }
	 #endregion

	 #region 视频格式转为Flv
	 /// <summary>
	 /// 视频格式转为Flv
	 /// </summary>
	 /// <param name="vFileName">原视频文件地址</param>
	 /// <param name="ExportName">生成后的Flv文件地址</param>
	 public bool ConvertFlv(string vFileName, string ExportName)
	 {
	 if ((!System.IO.File.Exists(ffmpegtool)) || (!System.IO.File.Exists(HttpContext.Current.Server.MapPath(vFileName))))
	 {
	 return false;
	 }
	 vFileName = HttpContext.Current.Server.MapPath(vFileName);
	 ExportName = HttpContext.Current.Server.MapPath(ExportName);
	 string Command = " -i \\"" + vFileName + "\\" -y -ab 32 -ar 22050 -b 800000 -s 480*360 \\"" + ExportName + "\\""; //Flv格式
	 System.Diagnostics.Process p = new System.Diagnostics.Process();
	 p.StartInfo.FileName = ffmpegtool;
	 p.StartInfo.Arguments = Command;
	 p.StartInfo.WorkingDirectory = HttpContext.Current.Server.MapPath("~/tools/");
	 p.StartInfo.UseShellExecute = false;
	 p.StartInfo.RedirectStandardInput = true;
	 p.StartInfo.RedirectStandardOutput = true;
	 p.StartInfo.RedirectStandardError = true;
	 p.StartInfo.CreateNoWindow = false;
	 p.Start();
	 p.BeginErrorReadLine();
	 p.WaitForExit();
	 p.Close();
	 p.Dispose();
	 return true;
	 }
	 #endregion

	 #region 生成Flv视频的缩略图
	 /// <summary>
	 /// 生成Flv视频的缩略图
	 /// </summary>
	 /// <param name="vFileName">视频文件地址</param>
	 public string CatchImg(string vFileName)
	 {
	 if ((!System.IO.File.Exists(ffmpegtool)) || (!System.IO.File.Exists(HttpContext.Current.Server.MapPath(vFileName)))) return "";
	 try
	 {
	 string flv_img_p = vFileName.Substring(0, vFileName.Length - 4) + ".jpg";
	 string Command = " -i " + HttpContext.Current.Server.MapPath(vFileName) + " -y -f image2 -t 0.1 -s " + sizeOfImg + " " + HttpContext.Current.Server.MapPath(flv_img_p);
	 System.Diagnostics.Process p = new System.Diagnostics.Process();
	 p.StartInfo.FileName = ffmpegtool;
	 p.StartInfo.Arguments = Command;
	 p.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
	 try
	 {
	 p.Start();
	 }
	 catch
	 {
	 return "";
	 }
	 finally
	 {
	 p.Close();
	 p.Dispose();
	 }
	 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(HttpContext.Current.Server.MapPath(flv_img_p)))
	 {
	 return flv_img_p;
	 }
	 return "";
	 }
	 catch
	 {
	 return "";
	 }
	 }
	 #endregion

	 #region 运行FFMpeg的视频解码(绝对路径)
	 /// <summary>
	 /// 转换文件并保存在指定文件夹下
	 /// </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)
	 {
	 string ffmpeg = Server.MapPath(VideoConvert.ffmpegtool);
	 if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(fileName)))
	 {
	 return "";
	 }
	 string flv_file = System.IO.Path.ChangeExtension(playFile, ".flv");
	 string FlvImgSize = VideoConvert.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;
	 try
	 {
	 System.Diagnostics.Process.Start(FilestartInfo);//转换
	 CatchImg(fileName, imgFile); //截图
	 }
	 catch
	 {
	 return "";
	 }
	 return "";
	 }

	 public string CatchImg(string fileName, string imgFile)
	 {
	 string ffmpeg = Server.MapPath(VideoConvert.ffmpegtool);
	 string flv_img = imgFile + ".jpg";
	 string FlvImgSize = VideoConvert.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(相对路径)
	 /// <summary>
	 /// 转换文件并保存在指定文件夹下
	 /// </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)
	 {
	 string ffmpeg = Server.MapPath(VideoConvert.ffmpegtool);
	 if ((!System.IO.File.Exists(ffmpeg)) || (!System.IO.File.Exists(fileName)))
	 {
	 return "";
	 }
	 string flv_img = System.IO.Path.ChangeExtension(Server.MapPath(imgFile), ".jpg");
	 string flv_file = System.IO.Path.ChangeExtension(Server.MapPath(playFile), ".flv");
	 string FlvImgSize = VideoConvert.sizeOfImg;

	 System.Diagnostics.ProcessStartInfo ImgstartInfo = new System.Diagnostics.ProcessStartInfo(ffmpeg);
	 ImgstartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
	 ImgstartInfo.Arguments = " -i " + fileName + " -y -f image2 -t 0.001 -s " + FlvImgSize + " " + flv_img;

	 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;
	 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;
	 if (System.IO.File.Exists(flv_img))
	 {
	 return flv_img;
	 }
	 return "";
	 }
	 #endregion

	 #region 运行mencoder的视频解码器转换(绝对路径)
	 /// <summary>
	 /// 运行mencoder的视频解码器转换
	 /// </summary>
	 public string MChangeFilePhy(string vFileName, string playFile, string imgFile)
	 {
	 string tool = Server.MapPath(VideoConvert.mencodertool);
	 if ((!System.IO.File.Exists(tool)) || (!System.IO.File.Exists(vFileName)))
	 {
	 return "";
	 }
	 string flv_file = System.IO.Path.ChangeExtension(playFile, ".flv");
	 string FlvImgSize = VideoConvert.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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　mmpeg　　视频转换　
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