BitmapSource.CopyPixels -what's a good value for stride?

Question

I\'m trying to get the pixel data from a WPF BitmapSource object. As I understand, this can be accomplished by calling its CopyPixels method. This

Answer 1

var stride = ((bitmapSource.PixelWidth * bitmapSource.Format.BitsPerPixel + 31) / 32) * 4;

or

var stride = ((bitmapSource.PixelWidth * bitmapSource.Format.BitsPerPixel + 31) >> 5) << 2;