public static void GetSizeAsync(string file, Action <Size> callback)
{
FFProbeProcess ffprobe = CreateFFProbeProcess(true);
ffprobe.StartInfo.FileName = "ffprobe.exe";
ffprobe.StartInfo.Arguments = $"-v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 \"{file}\"";
ffprobe.callback = callback;
ffprobe.input = file;
ffprobe.Exited += FFProbeExited;
ffprobe.Start();
}
private static FFProbeProcess CreateFFProbeProcess(bool raiseEvents)
{
FFProbeProcess process = new FFProbeProcess();
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.CreateNoWindow = true;
process.EnableRaisingEvents = raiseEvents;
return(process);
}
private static void FFProbeExited(object sender, EventArgs e)
{
FFProbeProcess p = (FFProbeProcess)sender;
var nums = p.StandardOutput.ToString().Split(new char[] { 'x' }, StringSplitOptions.RemoveEmptyEntries);
if (nums.Length == 2)
{
p.callback.Invoke(new Size(int.Parse(nums[0]), int.Parse(nums[1])));
}
else
{
p.callback.Invoke(new Size(0, 0));
}
p.Close();
p.Dispose();
}
public static Size GetSizeWait(string filepath)
{
FFProbeProcess process = CreateFFProbeProcess(false);
process.StartInfo.FileName = "ffprobe.exe";
process.StartInfo.Arguments = $"-v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 \"{filepath}\"";
process.input = filepath;
process.Start();
var nums = process.StandardOutput.ReadLine().Split(new char[] { 'x' }, StringSplitOptions.RemoveEmptyEntries);
process.StandardOutput.ReadToEnd(); //Fully read both of these buffers to prevent a hand on WaitForExit().
process.StandardError.ReadToEnd();
process.WaitForExit();
process.Close();
process.Dispose();
return(new Size(int.Parse(nums[0]), int.Parse(nums[1])));
}