Out of Memory error when create BitmapSource

I got an Out of memory issue with my code when run program to record screen after a long time.

Source code below...

    System::Windows::Media::Imaging::BitmapSource^ Previewer::VideoFrameToBitmapSource(const NuvixaLive::videoFrame* frame)
    {
        int width = frame->width();
        int height = frame->height();
        int pixels = width*height;

        if( _rgbaFrame == NULL)
        {
            _rgbaFrame = new videoFrame(width,height,videoFrame::rgba);
        }

        if(_rgbaFrame->height() != frame->height() ||
            _rgbaFrame->width() != frame->width() )
        {
            SAFE_DELETE(_rgbaFrame);
            _rgbaFrame = new videoFrame(width,height,videoFrame::rgba);
        }

        frame->RGBToRGBA(_rgbaFrame);
        _rgbaFrame->FlipV();

        BitmapSource^ out = BitmapSource::Create(width, height, 96.0, 96.0,
            PixelFormats::Bgra32, nullptr, System::IntPtr(_rgbaFrame->payload()), _rgbaFrame->len() , width*4);
        out->Freeze();
        return out;
    }

 and here is stack trace.

System.OutOfMemoryException: Insufficient memory to continue the execution of the program.
   at System.Windows.Media.Imaging.CachedBitmap.InitFromMemoryPtr(Int32 pixelWidth, Int32 pixelHeight, Double dpiX, Double dpiY, PixelFormat pixelFormat, BitmapPalette palette, IntPtr buffer, Int32 bufferSize, Int32 stride)
   at NuvixaLive.Previewer.VideoFrameToBitmapSource(videoFrame* frame)
   at NuvixaLive.Previewer.RaiseNewImage(videoFrame* A_0)
   at NuvixaLive.Previewer_imp.renderVideoThread(Previewer_imp* )
   at NuvixaLive.Previewer_imp.renderVideoThreadProxy(Void* p)

Would you please take a look and give me any help ?