private void CleanupProcessInfo(object sender, EventArgs e)
{
if (_cpuUsageMonitor != null)
{
_cpuUsageMonitor.Dispose();
_cpuUsageMonitor = null;
}
if (_currentffmpegProcess != null)
{
_currentffmpegProcess.ErrorDataReceived -= OnEncodingProgress;
_currentffmpegProcess.Exited -= CleanupProcessInfo;
_currentffmpegProcess.CancelErrorRead();
_currentffmpegProcess.Dispose();
_currentffmpegProcess = null;
}
}
private bool CanSupportMoreTasks()
{
if (!Model.AnyTasksPending)
{
return(false);
}
if (Model.NoTasksStarted)
{
return(true);
}
var currentTotalCpuUsage = ProcessCpuMonitor.GetTotalCpuUsage();
var averageTaskCpuUsage = Model.Tasks.Where(x => x.Started).Average(x => x.CpuUsage);
return(averageTaskCpuUsage < 100 - currentTotalCpuUsage);
}
public void StartEncoding(CancellationToken token)
{
var arguments = EncodingArgs;
Debug.WriteLine($"Starting ffmpeg with: \"{arguments}\"");
_currentffmpegProcess = new Process
{
StartInfo = new ProcessStartInfo
{
FileName = FfmpegUtils.FfmpegFilePath,
Arguments = arguments,
UseShellExecute = false,
RedirectStandardError = true,
CreateNoWindow = true,
WindowStyle = ProcessWindowStyle.Hidden
},
EnableRaisingEvents = true
};
_currentffmpegProcess.ErrorDataReceived += OnEncodingProgress;
_currentffmpegProcess.Exited += CleanupProcessInfo;
_currentffmpegProcess.StartAsChildProcess();
_currentffmpegProcess.BeginErrorReadLine();
_ = token.Register(() => _currentffmpegProcess?.Kill());
_encodingTask.Started = true;
// Give the process time to spool up
_ = _currentffmpegProcess.WaitForExit(1000);
// In case the process finished very quickly
if (_currentffmpegProcess?.HasExited == false && !_encodingTask.CancelToken.IsCancellationRequested)
{
_cpuUsageMonitor = new ProcessCpuMonitor(_currentffmpegProcess);
}
}
