// play file
    private void jButton_PlayActionPerformed(java.awt.event.ActionEvent evt) {
        
        try {
            p = Runtime.getRuntime().exec( "mplayer -slave -quiet /home/mario/willitblend_crop.mpg" );
            
            BufferedReader in = new BufferedReader(new InputStreamReader( p.getInputStream() ));
            PrintStream os = new PrintStream( p.getOutputStream() );
        } catch(Exception e) {
            System.out.println(e.getMessage());
        }
        
    }

// pause mplayer
    private void jButton_SendCommandActionPerformed(java.awt.event.ActionEvent evt) {
        WriteToStdOut("pause");
    }
    
// write to stdout
    public void WriteToStdOut(String command) {
        
        try {
            OutputStreamWriter out = new OutputStreamWriter(p.getOutputStream());
            out.write(command);
            out.close();
        } catch(Exception e) {
            System.out.println(e.getMessage());
        }
        
    }