Discussion :

[zax-tfh]

Bonjour à tous,

Je cherche désesperement depuis 3 jours une methode pour encoder une vidéo sur un codec précis. Je ne trouve aucune info, mais vraiment rien du tout pour pouvoir faire cela.
Comment procéder... rien de rien !

Quelqu'un a-t-il des infos à ce sujet ?

Merci d'avance car là je patauge severement

@ bientot

[Mose]

Ca existe les API .Net de compression/décompression vidéo ?
Sinon en COM c'est à peu près sûr, après faudra te renseigner sur l'interopérabilité...

[zax-tfh]

Salut,

Justement, je suis tombé sur un code nickel chrome ! il se sert de DirectShow et est capable d'encoder la vidéo sans programme tiers. Par contre j'ai beau faire je ne sais combien d'essais je n'arrive pas à ce que je cherche.
Voici le source en question :

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Runtime.InteropServices;
 
using DirectShowLib;
 
public class M2Mkv : Form
{
    private Button button1;
    private RadioButton MkvRadioButton;
    private RadioButton WmvRadioButton;
    private GroupBox groupBox1;
    private Label label1;
 
    private Container components = null;
 
    // The main com object
    FilterGraph fg = null;
    // The graphbuilder interface ref
    IGraphBuilder gb = null;
    // The mediacontrol interface ref
    IMediaControl mc = null;
    // The mediaevent interface ref
    IMediaEventEx me = null;
 
    // Matroska support filter interface
    IBaseFilter matroska_mux = null;
 
    // variable to store the filename and extension
    string fName, fExt;
    // one "global" hr
    int hr;
 
    public M2Mkv()
    {
        InitializeComponent();
    }
 
    protected override void Dispose( bool disposing )
    {
        if( disposing )
        {
            if (components != null) 
            {
                components.Dispose();
            }
        }
        base.Dispose( disposing );
    }
 
		#region Windows Form Designer generated code
    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this.button1 = new System.Windows.Forms.Button();
        this.label1 = new System.Windows.Forms.Label();
        this.MkvRadioButton = new System.Windows.Forms.RadioButton();
        this.WmvRadioButton = new System.Windows.Forms.RadioButton();
        this.groupBox1 = new System.Windows.Forms.GroupBox();
        this.groupBox1.SuspendLayout();
        this.SuspendLayout();
        // 
        // button1
        // 
        this.button1.Location = new System.Drawing.Point(16, 16);
        this.button1.Name = "button1";
        this.button1.TabIndex = 0;
        this.button1.Text = "Convert";
        this.button1.Click += new System.EventHandler(this.button1_Click);
        // 
        // label1
        // 
        this.label1.Location = new System.Drawing.Point(24, 120);
        this.label1.Name = "label1";
        this.label1.Size = new System.Drawing.Size(80, 24);
        this.label1.TabIndex = 1;
        // 
        // MkvRadioButton
        // 
        this.MkvRadioButton.Checked = true;
        this.MkvRadioButton.Location = new System.Drawing.Point(8, 16);
        this.MkvRadioButton.Name = "MkvRadioButton";
        this.MkvRadioButton.TabIndex = 2;
        this.MkvRadioButton.TabStop = true;
        this.MkvRadioButton.Text = "Convert to mkv";
        // 
        // WmvRadioButton
        // 
        this.WmvRadioButton.Location = new System.Drawing.Point(8, 40);
        this.WmvRadioButton.Name = "WmvRadioButton";
        this.WmvRadioButton.TabIndex = 3;
        this.WmvRadioButton.TabStop = true;
        this.WmvRadioButton.Text = "Convert to wmv";
        // 
        // groupBox1
        // 
        this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                                this.WmvRadioButton,
                                                                                this.MkvRadioButton});
        this.groupBox1.Location = new System.Drawing.Point(16, 40);
        this.groupBox1.Name = "groupBox1";
        this.groupBox1.Size = new System.Drawing.Size(128, 72);
        this.groupBox1.TabIndex = 4;
        this.groupBox1.TabStop = false;
        // 
        // M2Mkv
        // 
        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(232, 150);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                      this.label1,
                                                                      this.button1,
                                                                      this.groupBox1});
        this.MaximizeBox = false;
        this.Name = "M2Mkv";
        this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Hide;
        this.Text = "m2mkv";
        this.groupBox1.ResumeLayout(false);
        this.ResumeLayout(false);
 
    }
		#endregion
 
    [STAThread]
    static void Main() 
    {
        Application.Run(new M2Mkv());
    }
 
    //
    // method to ask the user the filename
    //
    private void button1_Click(object sender, System.EventArgs e)
    {
        OpenFileDialog ofd = new OpenFileDialog();
        if( ofd.ShowDialog() == DialogResult.OK ) 
        {
            FileInfo fi = new FileInfo( ofd.FileName );
            fExt = fi.Extension;
            fName = fi.FullName.Substring( 0, fi.FullName.Length - fExt.Length );
            CloseInterfaces();
            InitInterfaces();
            if( MkvRadioButton.Checked )
              Convert2Mkv( fName );
            else
              Convert2Wmv( fName );
        }
    }
 
    // 
    // This method create the filter graph
    //
    void InitInterfaces() 
    {
        try 
        {   
            fg = new FilterGraph();
            gb = (IGraphBuilder)fg;  
            mc = (IMediaControl)fg;
            me = (IMediaEventEx)fg;                
        }
        catch(Exception) 
        {
            MessageBox.Show( "Couldn't start" );
        }
    }  
 
    //
    //This method stop the filter graph and ensures that we stop
    //sending messages to our window
    //
    void CloseInterfaces() 
    {   
        if( me != null ) 
        {
            hr = mc.Stop();
            DsError.ThrowExceptionForHR( hr );
 
            hr = me.SetNotifyWindow( IntPtr.Zero , WM_GRAPHNOTIFY, IntPtr.Zero ); 
            DsError.ThrowExceptionForHR( hr );
        }  
        mc = null;
        me = null;
        gb = null;
        if( matroska_mux != null )
          Marshal.ReleaseComObject( matroska_mux );
        matroska_mux = null;
        if( fg != null ) 
            Marshal.ReleaseComObject( fg );
        fg = null;
    }   
 
 
    //
    // This method convert the input file to an mkv file
    //
    void Convert2Mkv( string fileName ) 
    {
        try 
        {
            label1.Text = "processing";
            button1.Enabled = false;
 
            hr = me.SetNotifyWindow( this.Handle , WM_GRAPHNOTIFY, IntPtr.Zero );
            DsError.ThrowExceptionForHR( hr );
 
            // we want to add a filewriter filter to the filter graph
            FileWriter file_writer = new FileWriter();
 
            // make sure we access the IFileSinkFilter interface to
            // set the file name
            IFileSinkFilter fs = (IFileSinkFilter)file_writer;
 
            fs.SetFileName( fileName + ".mkv", null );
            DsError.ThrowExceptionForHR( hr );
 
            // add the filter to the graph
            hr = gb.AddFilter( (IBaseFilter)file_writer, "File Writer" );
            DsError.ThrowExceptionForHR( hr );
 
            // create an instance of the matroska multiplex filter and add it
            // Matroska Mux Clsid = {1E1299A2-9D42-4F12-8791-D79E376F4143}	
            Guid guid = new Guid( "1E1299A2-9D42-4F12-8791-D79E376F4143" );
            Type comtype = Type.GetTypeFromCLSID( guid );
            matroska_mux = (IBaseFilter)Activator.CreateInstance( comtype );
 
            hr = gb.AddFilter( (IBaseFilter)matroska_mux, "Matroska Muxer" );
            DsError.ThrowExceptionForHR( hr );
 
            // use Intelligent connect to build the rest of the graph
            hr = gb.RenderFile( fileName + fExt, null );
            DsError.ThrowExceptionForHR( hr );
 
            // we are ready to convert
            hr = mc.Run();          
            DsError.ThrowExceptionForHR( hr );
        }
        catch( Exception ex ) 
        {
            MessageBox.Show( "Error converting to mvk: " + ex.Message );
        }
    }
 
    //
    // This method convert the input file to an wmv file
    //
    void Convert2Wmv( string fileName ) 
    {
        try 
        {
            label1.Text = "processing";
            button1.Enabled = false;
 
            hr = me.SetNotifyWindow( this.Handle , WM_GRAPHNOTIFY, IntPtr.Zero );
            DsError.ThrowExceptionForHR( hr );
 
            // here we use the asf writer to create wmv files
            WMAsfWriter asf_filter = new WMAsfWriter();
            IFileSinkFilter fs = (IFileSinkFilter)asf_filter;
 
            hr = fs.SetFileName( fileName + ".wmv", null );
            DsError.ThrowExceptionForHR( hr );
 
            hr = gb.AddFilter( (IBaseFilter)asf_filter, "WM Asf Writer" );
            DsError.ThrowExceptionForHR( hr );
 
            hr = gb.RenderFile( fileName + fExt, null );
            DsError.ThrowExceptionForHR( hr );
 
            hr = mc.Run();          
            DsError.ThrowExceptionForHR( hr );
        }
        catch( Exception ex ) 
        {
            MessageBox.Show( "Error converting to wmv: " + ex.Message );
        }        
    }
 
 
    int WM_GRAPHNOTIFY	= 0x00008001;
 
    protected override void WndProc( ref Message m )
    {
        if( m.Msg == WM_GRAPHNOTIFY )
        {
            int p1, p2;
            EventCode code;
 
            if( me == null )
                return;
            while( me.GetEvent( out code, out p1, out p2, 0 ) == 0 ) 
            {                                                 
                if( code == EventCode.Complete ) 
                {                        
                    label1.Text = "done";
                    button1.Enabled = true;
                    mc.Stop();
                }
 
                me.FreeEventParams( code, p1, p2 );                                 
             }
            return;
        }
        base.WndProc( ref m );
    }
}

Moi je cherche à encoder ma vidéo en Xvid et mp3 (format Psp). Le truc c'est qu'il faut que je lui précise ces codecs. Donc ni une ni deux, je lance graphedit et je chope les clsid des codecs en question.
Problèmes rencontrés :
- meme clsid entre xvid et mp3
- en testant ca plante
- comment on lie le tout ?
- bref comment on se sert de ce code pour des cas particuliers comme le mien quoi.

J'ai beau chercher y'a vraiment rien sur le web à ce propos

Merci d'avance
@++