This article describes a C # implementation of a method by ffmpeg from an FLV video file. Share to everyone for your reference. The specific analysis is as follows:
Need to download FFmpeg first, this is open source, the code is as follows:
The code is as follows:
Using System;
Using System.Configuration;
public class PublicMethod:System.Web.UI.Page
{
Public Publicmethod ()
{
}
File path
public static string ffmpegtool = "Ffmpeg/ffmpeg.exe";
public static string mencodertool = "Mencoder/mencoder.exe";
public static string flvtool = "Flvtool/flvtool2.exe";//flv markup Tool
public static string upfile = "Upfiles" + "/";//Upload Folder
public static string imgfile = "Imgfile" + "/";//Picture folder
public static string playfile = "Playfiles" + "/";//flv folder
public static string xmlfile = "Xmlfiles" + "/";//xml folder
public static string sizeofimg = "240x180";//width and height of picture
public static string widthoffile = "n"; width of//flv file
public static string heightoffile = "n"; the height of the//flv file
public static string ffmpegtool = configurationmanager.appsettings["FFmpeg"];
public static string mencodertool = configurationmanager.appsettings["MEncoder"];
public static string upfile = configurationmanager.appsettings["Upfile"] + "/";
public static string imgfile = configurationmanager.appsettings["Imgfile"] + "/";
public static string playfile = configurationmanager.appsettings["Playfile"] + "/";
File picture size
public static string sizeofimg = configurationmanager.appsettings["Catchflvimgsize"];
File size
public static string widthoffile = configurationmanager.appsettings["Widthsize"];
public static string heightoffile = configurationmanager.appsettings["Heightsize"];
//Get the name of the file
Private System.Timers.Timer MyTimer = new System.Timers.Timer (3000);//Timer
public static string flvname = "";
public static string imgname = "";
public static string flvxml = "";
public static int pId = 0;
public static string GetFileName (String fileName)
{
int i = filename.lastindexof ("\") + 1;
String Name = Filename.substring (i);
return Name;
}
Get file name extension
public static string GetExtension (String fileName)
{
int i = Filename.lastindexof (".") +1;
String Name = Filename.substring (i);
return Name;
}
//
#region//Run FFmpeg video decoding, (this is the absolute path)
<summary>
Convert the file and save it under the specified folder (this is the absolute path)
</summary>
<param name= "FileName" > The path to the uploaded video file (original file) </param>
<param name= "Playfile" > The path of the converted file (network play file) </param>
<param name= "Imgfile" > Picture paths captured from video files </param>
<returns> success: Return image virtual address; Failed: returned empty string </returns>
public void Changefilephy (string fileName, String playfile, String imgfile)
{
Get Ffmpeg.exe path, path configured in Web. config, such as: <add key= "FFmpeg" value= "E:aspx1ffmpeg.exe"/>
String ffmpeg = Server.MapPath (Publicmethod.ffmpegtool);
if ((! System.IO.File.Exists (ffmpeg)) | | (! System.IO.File.Exists (fileName)))
{
Return
}
Get picture and (. flv) file relative path/last path stored to database, such as:/web/user1/00001.jpg
String flv_file = System.IO.Path.ChangeExtension (Playfile, ". flv");
Size, configured in Web. config, such as: <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_im G
Try
{
Transformation
System.Diagnostics.Process.Start (Filestartinfo);
//
Catchimg (FileName, imgfile);
System.Diagnostics.Process.Start (Imgstartinfo);
}
Catch
{
}
}
#endregion
#region
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_i mg
Try
{
System.Diagnostics.Process.Start (Imgstartinfo);
}
Catch
{
Return "";
}
//
Catchflvtool (FileName);
if (System.IO.File.Exists (flv_img))
{
return flv_img;
}
Return "";
}
#endregion
#region//Run FFmpeg video decoding, (here is (virtual) relative path)
<summary>
Convert the file and save it under the specified folder (here is the relative path)
</summary>
<param name= "FileName" > The path to the uploaded video file (original file) </param>
<param name= "Playfile" > The path of the converted file (network play file) </param>
<param name= "Imgfile" > Picture paths captured from video files </param>
<returns> success: Return image virtual address; Failed: returned empty string </returns>
public void Changefilevir (string fileName, String playfile, String imgfile)
{
Get Ffmpeg.exe path, path configured in Web. config, such as: <add key= "FFmpeg" value= "E:\aspx1\ffmpeg.exe"/>
String ffmpeg = Server.MapPath (Publicmethod.ffmpegtool);
if ((! System.IO.File.Exists (ffmpeg)) | | (! System.IO.File.Exists (fileName)))
{
Return
}
Get picture and (. flv) file relative path/last path stored to database, such as:/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");
Size, configured in Web. config, such as: <add key= "catchflvimgsize" value= "240x180″/>
string flvimgsize = publicmethod.sizeofimg;
System.Diagnostics.ProcessStartInfo filestartinfo = new System.Diagnostics.ProcessStartInfo (ffmpeg);
Filestartinfo.windowstyle = System.Diagnostics.ProcessWindowStyle.Hidden;
This is combined into the parameters required by the Ffmpeg.exe file, where the command is FFmpeg 0.4.9 debug through
Ffmpeg-i F:\01.wmv-ab 56-ar 22050-b 500-r 15-s
filestartinfo.arguments = "-I" + FileName + "-ab 56-ar 22050-b 500-r 15-s" + widthoffile + "X" + Heightoffile + " "+ flv_file;
Try
{
System.Diagnostics.Process PS = new System.Diagnostics.Process ();
Ps. StartInfo = Filestartinfo;
Ps. Start ();
Session.add ("ProcessID", Ps. ID);
Session.add ("flv", flv_file);
Session.add ("img", Imgfile);
mytimer.elapsed + = new System.Timers.ElapsedEventHandler (mytimer_test);
Mytimer.enabled = true;
}
Catch
{
}
}
#endregion
#region//Run MEncoder Video Decoder conversion (this is (absolute path))
public void 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");
Size, configured in Web. config, such as: <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_n OT_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 PS = new System.Diagnostics.Process ();
Ps. StartInfo = Filestartinfo;
Ps. Start ();
Session.add ("ProcessID", Ps. ID);
Session.add ("flv", flv_file);
Session.add ("img", Imgfile);
PId = PS. Id;
Flvname = Flv_file;
Imgname = Imgfile;
mytimer.elapsed + = new System.Timers.ElapsedEventHandler (mytimer_test);
Mytimer.enabled = true;
}
Catch
{
}
}
<summary>
Timer function, Auto Save
</summary>
<param name= "Sender" ></param>
<param name= "E" ></param>
private void Mytimer_test (object sender, System.Timers.ElapsedEventArgs e)
{
if (!object. Equals (NULL, session["ProcessID"]))
{
Try
{
System.Diagnostics.Process PRS = System.Diagnostics.Process.GetProcessById (int. Parse (session["ProcessID"). ToString ()));
if (PRS. hasexited)
{
Catchimg (session["flv"). ToString (), session["IMG"]. ToString ());
Catchflvtool (session["flv"). ToString ());
mytimer.enabled = false;
Mytimer.close ();
Mytimer.dispose ();
Session.Abandon ();
}
}
Catch
{
Catchimg (session["flv"). ToString (), session["IMG"]. ToString ());
Catchflvtool (session["flv"). ToString ());
mytimer.enabled = false;
Mytimer.close ();
Mytimer.dispose ();
Session.Abandon ();
}
}
}
#endregion
public string Catchflvtool (string fileName)
{
//
String flvtools = Server.MapPath (Publicmethod.flvtool);
//
String flv_xml = Filename.replace (". flv", ". xml"). Replace (PublicMethod.upFile.Replace ("/", ""), PublicMethod.xmlFile.Replace ("/", ""));
//
System.Diagnostics.ProcessStartInfo imgstartinfo = new System.Diagnostics.ProcessStartInfo (flvtools);
Imgstartinfo.windowstyle = System.Diagnostics.ProcessWindowStyle.Hidden;
//
Imgstartinfo.arguments = "" + filename + "-UPX" + filename + ">" + flv_xml;
Try
{
System.Diagnostics.Process.Start (Imgstartinfo);
}
Catch
{
Return "";
}
//
if (System.IO.File.Exists (Flv_xml))
{
return flv_xml;
}
Return "";
}
}
I hope this article is helpful to everyone's C # programming.
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C # Implementation of the method by ffmpeg from an FLV video file
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C # Implementation of the method by ffmpeg from an FLV video file
