ProcessManager is a managed (C#) library that can be used to queue and start processes like you would with Process.Start() but better. Maximum number of simultaneous processes can be configured, processes can be queued and events will notify your code when a process is started, finished or outputs data to standard output or standard error.
This library is great for running lengthy, CPU intensive, tasks like image or video conversions.
Install-Package ProcessManager
var manager = new Manager(4); // Max 4 processes will be started simultaneously
manager.Start();
manager.ProcessErrorDataReceived += (sender, e) => Console.WriteLine(e.Data);
manager.ProcessOutputDataReceived += (sender, e) => Console.WriteLine(e.Data);
foreach (var videoFileName in Directory.EnumerateFiles("videos"))
{
var info = new ProcessInfo(
"ffprobe.exe",
string.Format("-v quiet -print_format json -show_format -show_streams \"{0}\"", videoFileName));
manager.Queue(info);
}