C # implements the method of capturing screenshots from an FLV video file by FFmpeg

Source: Internet
Author: User
Tags flv file

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.

In addition to the Declaration, Running GuestArticles are original, reproduced please link to the form of the address of this article
C # Implementation of the method by ffmpeg from an FLV video file

This address: http://www.paobuke.com/develop/c-develop/pbk23094.html






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C # Implementation of the method by ffmpeg from an FLV video file

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