public static CropDetect GetCropDetect(string file, TimeSpan duration)
{
const int numberOfChecks = 5;
var totalSeconds = duration.TotalSeconds;
var startEndPadding = totalSeconds / 10;
var timeToCheck = startEndPadding;
var timeBetweenChecks = (totalSeconds - (startEndPadding * 2)) / numberOfChecks;
CropDetect bestCropDetect = null;
try
{
while (timeToCheck < totalSeconds)
{
var output = RunFFmpegProcess(CropDetectArgs(file, timeToCheck));
var cropDetect = CropDetect.CreateFromString(output);
if (cropDetect == null)
{
continue;
}
bestCropDetect = bestCropDetect != null?CropDetect.SelectSmallestCrop(bestCropDetect, cropDetect) : cropDetect;
timeToCheck += timeBetweenChecks;
}
return(bestCropDetect);
}
catch
{
return(null);
}
}
public static CropDetect SelectSmallestCrop(CropDetect first, CropDetect second)
{
int width = Math.Min(first.Width, second.Width);
int height = Math.Min(first.Height, second.Height);
int x = Math.Min(first.X, second.X);
int y = Math.Min(first.Y, second.Y);
return(new CropDetect(width, height, x, y));
}
