提高视频质量

Question

BitmapSource bs = null, bs2 = null, bs3 = null, bs4 = null;
        BitmapData bitmapData = new BitmapData(), bitmapData2 = new BitmapData(), bitmapData3 = new BitmapData(), bitmapData4 = new BitmapData();
        int imageWidth = bitmap.Width / 3;
        int imageHeight =bitmap.Height;
        var rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
        var size = (rect.Width * rect.Height) * 4;
        try
        {
            bitmapData = bitmap.LockBits(
                    rect,
                    ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
            bitmapData2 = bitmap2.LockBits(
                 rect,
                 ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
            bitmapData3 = bitmap3.LockBits(
                  rect,
                  ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppArgb);

            bs = BitmapSource.Create(
                   bitmap.Width,
                   bitmap.Height,
                   bitmap.HorizontalResolution,
                   bitmap.VerticalResolution,
                   PixelFormats.Bgra32,
                   null,
                   bitmapData.Scan0,
                   size,
                   bitmapData.Stride);

            bs2 = BitmapSource.Create(
              bitmap2.Width,
                   bitmap2.Height,
               bitmap2.HorizontalResolution,
               bitmap2.VerticalResolution,
               PixelFormats.Bgra32,
               null,
               bitmapData2.Scan0,
               size,
               bitmapData2.Stride);

            bs3 = BitmapSource.Create(
                bitmap3.Width,
                   bitmap3.Height,
                 bitmap3.HorizontalResolution,
                 bitmap3.VerticalResolution,
                 PixelFormats.Bgra32,
                 null,
                 bitmapData3.Scan0,
                 size,
                 bitmapData3.Stride);
        }
        finally
        {
            bitmap.UnlockBits(bitmapData);
            bitmap2.UnlockBits(bitmapData2);
            bitmap3.UnlockBits(bitmapData3);
        }

        //imageWidth = bitmap.Width / 2;
        //imageHeight = bitmap.Height / 2;
        // Draws the images into a DrawingVisual component
        System.Windows.Size size1 = new System.Windows.Size(imageWidth * 2, imageHeight * 2);
        DrawingVisual drawingVisual = new DrawingVisual();
        using (DrawingContext drawingContext = drawingVisual.RenderOpen())
        {
            drawingContext.DrawImage(bs, new Rect(0, 0, imageWidth, imageHeight));
            drawingContext.DrawImage(bs2, new Rect(imageWidth, 0, imageWidth, imageHeight));
            drawingContext.DrawImage(bs3, new Rect(imageWidth * 2, 0, imageWidth, imageHeight));
            //drawingContext.DrawImage(bs3, new Rect(0, imageHeight, imageWidth, imageHeight));
            //drawingContext.DrawRectangle(new VisualBrush(), null, new Rect(new System.Windows.Point(), size1));
        }
        JpegBitmapEncoder encoder = new JpegBitmapEncoder();
        // Converts the Visual (DrawingVisual) into a BitmapSource
        RenderTargetBitmap bmp = new RenderTargetBitmap(imageWidth*3, imageHeight, 100,100, PixelFormats.Default);//PixelFormats.Pbgra32
        //RenderTargetBitmap bmp = new RenderTargetBitmap(imageWidth * 3, imageHeight, 110, 110, PixelFormats.Pbgra32);//PixelFormats.Pbgra32
        bmp.Render(drawingVisual);
        try
        {
            encoder.Frames.Add(BitmapFrame.Create(bmp));
            // Saves the image into a file using the encoder
            using (Stream stream = File.Create(Path.Combine(ApplicationCache.Instance().DefaultImageFolder, fileName + Constants.ImageCapture.DEFAULT_IMAGE_EXTENSION)))
            {                    
                encoder.Save(stream);
            }
            GC.Collect();
        }
        catch (Exception EX)
        {
            MessageBox.Show(EX.Message);
        }