/// <summary>
/// When using a crop, get the resolution to pass to ffmpeg in order to preserve aspect ratio.
/// </summary>
public static ImageSize getResolutionToUseWithCrop(string file, ImageSize desiredSize, ImageCrop crop)
{
ImageSize outSize;
int totalCropWidth = crop.Left + crop.Right;
int totalCropHeight = crop.Top + crop.Bottom;
if (totalCropWidth == 0 && totalCropHeight == 0)
{
outSize = desiredSize;
}
else
{
ImageSize origSize = UtilsVideo.getVideoResolution(file);
// output_resolution = desired_resolution + (total_crop - (desired_resolution/orig_resolution) * total_crop))
outSize = new ImageSize();
outSize.Width = desiredSize.Width + (totalCropWidth - (int)((desiredSize.Width / (float)origSize.Width) * totalCropWidth));
outSize.Height = desiredSize.Height + (totalCropHeight - (int)((desiredSize.Height / (float)origSize.Height) * totalCropHeight));
}
return(outSize);
}
