问使用C# / DirectShow.Net / 3ivx在MP4中编码

EN

    //
    // This method convert the input file to an wmv file
    //
    void Convert2Wmv(string fileName)
    {
        try
        {
            label1.Text = "Encodage";
            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);
        }
    }