Добрый день. Пишу программу, одной из функций которой будет запись видео с веб-камеры. Работаю с DsPack,в папке примеров нашел пример записи видео, но размер видео-файла очень большой, около гигабайта за минуту.
Выкладываю этот демо проект.

procedure TMainForm.FormCreate(Sender: TObject);
var i: integer;
begin
  CapEnum := TSysDevEnum.Create(CLSID_VideoInputDeviceCategory);
  for i := 0 to CapEnum.CountFilters - 1 do
    VideoCapFilters.Items.Add(CapEnum.Filters[i].FriendlyName);

  CapEnum.SelectGUIDCategory(CLSID_AudioInputDeviceCategory);
  for i := 0 to CapEnum.CountFilters - 1 do
    AudioCapFilters.Items.Add(CapEnum.Filters[i].FriendlyName);

  VideoMediaTypes := TEnumMediaType.Create;
  AudioMediaTypes := TEnumMediaType.Create;
end;

procedure TMainForm.FormDestroy(Sender: TObject);
begin
  CapEnum.Free;
  VideoMediaTypes.Free;
  AudioMediaTypes.Free;
end;

// Select the video Source
procedure TMainForm.VideoCapFiltersClick(Sender: TObject);
var
  PinList: TPinList;
  i: integer;
begin
  CapEnum.SelectGUIDCategory(CLSID_VideoInputDeviceCategory);
  if VideoCapFilters.ItemIndex <> -1 then
  begin
    VideoSourceFilter.BaseFilter.Moniker := CapEnum.GetMoniker(VideoCapFilters.ItemIndex);
    VideoSourceFilter.FilterGraph := CaptureGraph;
    CaptureGraph.Active := true;
    PinList := TPinList.Create(VideoSourceFilter as IBaseFilter);
    VideoFormats.Clear;
    VideoMediaTypes.Assign(PinList.First);
    for i := 0 to VideoMediaTypes.Count - 1 do
      VideoFormats.Items.Add(VideoMediaTypes.MediaDescription[i]);
    CaptureGraph.Active := false;
    PinList.Free;
    StartButton.Enabled := true;
  end;
end;

// Select the audio Source
procedure TMainForm.AudioCapFiltersClick(Sender: TObject);
var
  PinList: TPinList;
  i, LineIndex: integer;
  ABool: LongBool;
begin
  CapEnum.SelectGUIDCategory(CLSID_AudioInputDeviceCategory);
  if AudioCapFilters.ItemIndex <> -1 then
  begin
    AudioSourceFilter.BaseFilter.Moniker := CapEnum.GetMoniker(AudioCapFilters.ItemIndex);
    AudioSourceFilter.FilterGraph := CaptureGraph;
    CaptureGraph.Active := true;
    PinList := TPinList.Create(AudioSourceFilter as IBaseFilter);
    AudioFormats.Clear;
    i := 0;
    while i < PinList.Count do
      if PinList.PinInfo[i].dir = PINDIR_OUTPUT then
        begin
          AudioMediaTypes.Assign(PinList.Items[i]);
          PinList.Delete(i);
        end else inc(i);

    for i := 0 to AudioMediaTypes.Count - 1 do
    begin
      AudioFormats.Items.Add(AudioMediaTypes.MediaDescription[i]);
    end;

    CaptureGraph.Active := false;
    InputLines.Clear;
    LineIndex := -1;
    for i := 0 to PinList.Count - 1 do
    begin
      InputLines.Items.Add(PinList.PinInfo[i].achName);
      with (PinList.Items[i] as IAMAudioInputMixer) do get_Enable(ABool);
      if ABool then LineIndex := i;
    end;
    InputLines.ItemIndex := LineIndex;
    PinList.Free;
    StartButton.Enabled := true;
  end;
end;

// Start Capture
procedure TMainForm.StartButtonClick(Sender: TObject);
var
  multiplexer: IBaseFilter;
  Writer: IFileSinkFilter;
  PinList: TPinList;
  i: integer;
begin

  // Activate the filter graph, at this stage the source filters are added to the graph
  CaptureGraph.Active := true;

  // configure output Audio media type + source
  if AudioSourceFilter.FilterGraph <> nil then
  begin
    PinList := TPinList.Create(AudioSourceFilter as IBaseFilter);
    i := 0;
    while i < PinList.Count do
      if PinList.PinInfo[i].dir = PINDIR_OUTPUT then
        begin
          if AudioFormats.ItemIndex <> -1 then
            with (PinList.Items[i] as IAMStreamConfig) do
              SetFormat(AudioMediaTypes.Items[AudioFormats.ItemIndex].AMMediaType^);
          PinList.Delete(i);
        end else inc(i);
    if InputLines.ItemIndex <> -1 then
      with (PinList.Items[InputLines.ItemIndex] as IAMAudioInputMixer) do
        put_Enable(true);
    PinList.Free;
  end;

  // configure output Video media type
  if VideoSourceFilter.FilterGraph <> nil then
  begin
    PinList := TPinList.Create(VideoSourceFilter as IBaseFilter);
    if VideoFormats.ItemIndex <> -1 then
      with (PinList.First as IAMStreamConfig) do
        SetFormat(VideoMediaTypes.Items[VideoFormats.ItemIndex].AMMediaType^);
    PinList.Free;
  end;


  // now render streams
  with CaptureGraph as IcaptureGraphBuilder2 do
  begin
    // set the output filename
    SetOutputFileName(MEDIASUBTYPE_Avi, PWideChar(CapFile), multiplexer, Writer);

    // Connect Video preview (VideoWindow)
    if VideoSourceFilter.BaseFilter.DataLength > 0 then
      RenderStream(@PIN_CATEGORY_PREVIEW, nil, VideoSourceFilter as IBaseFilter,
        nil , VideoWindow as IBaseFilter);

    // Connect Video capture streams
    if VideoSourceFilter.FilterGraph <> nil then
      RenderStream(@PIN_CATEGORY_CAPTURE, nil, VideoSourceFilter as IBaseFilter,
        nil, multiplexer as IBaseFilter);

    // Connect Audio capture streams
    if AudioSourceFilter.FilterGraph <> nil then
    begin

      RenderStream(nil, nil, AudioSourceFilter as IBaseFilter,
        nil, multiplexer as IBaseFilter);
    end;
  end;
  CaptureGraph.Play;
  StopButton.Enabled := true;
  StartButton.Enabled := false;
  AudioFormats.Enabled := false;
  AudioCapFilters.Enabled := false;
  VideoFormats.Enabled := false;
  VideoCapFilters.Enabled := false;
  Timer.Enabled := true;
end;

Подскажите, пожалуйста, в чем может быть проблема. Только с этим компонентом я работал не так много, поэтому просьба не сыпать терминами.
Заранее спасибо.