Maintain ration of input no resize

[Norc89]

Hi, I'm merging images and videos into one big video. The problem which i have is that if not all content is in the same ratio then content is stretched. I would like to have back borders on side. If is this possible how to set this ?

[radek-k]

It could be done using System.Drawing.Graphics class. See the example:

private static Bitmap ScaleImage(Bitmap image, int targetWidth, int targetHeight)
{
    var output = new Bitmap(targetWidth, targetHeight, PixelFormat.Format24bppRgb);
    using (var g = Graphics.FromImage(output))
    {
        g.InterpolationMode = InterpolationMode.High;
        g.CompositingQuality = CompositingQuality.HighQuality;
        g.SmoothingMode = SmoothingMode.AntiAlias;

        var scale = Math.Min(targetWidth / (double)image.Width, targetHeight / (double)image.Height);
        var scaleWidth = (int)(image.Width * scale);
        var scaleHeight = (int)(image.Height * scale);

        g.DrawImage(image, (targetWidth - scaleWidth) / 2, (targetHeight - scaleHeight) / 2, scaleWidth, scaleHeight);
    }
    return output;
}