/// <summary>
/// Runs in UI thread.
/// </summary>
private void CalculateTimeRemaining()
{
// Thread safety :-)
var progress = _progress;
// 0.0 to 1.0
var pct = progress / 100;
// Previously calculated estimate from the last tick
var oldEstimate = _timeRemaining;
// Fresh estimate (might be jerky)
var newEstimate = TimeSpan.Zero;
// The final estimate value that will actually be used
var finalEstimate = oldEstimate;
// Make sure progress percentage is within legal bounds (0%, 100%)
if (pct > 0 && pct < 1)
newEstimate = new TimeSpan((long)(RunTime.Ticks / pct) - RunTime.Ticks);
// Make sure the user gets fresh calculations when the process is first started and when it's nearly finished.
var criticalThreshold = TimeSpan.FromMinutes(1.25);
var isCriticalPeriod = progress < .5 || progress > 95 || oldEstimate < criticalThreshold || newEstimate < criticalThreshold;
// If the new estimate differs from the previous estimate by more than 2 minutes, use the new estimate.
var changeThreshold = pct < 0.2 ? TimeSpan.FromMinutes(2) : TimeSpan.FromSeconds(20);
var isLargeChange = Math.Abs(newEstimate.TotalSeconds - oldEstimate.TotalSeconds) > changeThreshold.TotalSeconds;
// If the previous estimate was less than 1 second remaining, use the new estimate.
var lowPreviousEstimate = oldEstimate.TotalMilliseconds < 1000;
// Use the new estimate
if (isCriticalPeriod || isLargeChange || lowPreviousEstimate)
{
finalEstimate = newEstimate;
}
// Decrement the previous estimate by roughly 1 second
else
{
finalEstimate -= (DateTime.Now - _lastTick);
}
// If the estimate dips below 0, set it to 30 seconds
if (finalEstimate.TotalMilliseconds < 0)
finalEstimate = TimeSpan.FromSeconds(30);
// Truncate (remove) milliseconds from estimate
finalEstimate = TimeSpan.FromSeconds(Math.Floor(finalEstimate.TotalSeconds));
_timeRemaining = finalEstimate;
_uiProgressState = new ProgressState
{
ProcessState = State,
PercentComplete = progress,
TimeElapsed = RunTime,
TimeRemaining = finalEstimate
};
}
private void OnProgressUpdated(FFmpeg ffmpeg, ProgressState progressState, CancellationToken cancellationToken)
{
var status = string.Format("Muxing to MKV with FFmpeg: {0} - {1} @ {2} fps",
TimeSpan.FromMilliseconds(ffmpeg.CurOutTimeMs).ToStringMedium(),
FileUtils.HumanFriendlyFileSize(ffmpeg.CurSize),
ffmpeg.CurFps.ToString("0.0"));
Host.ReportProgress(this, progressState.PercentComplete, status);
if (cancellationToken.IsCancellationRequested)
ffmpeg.Kill();
}
/// <summary>
/// Runs in UI thread.
/// </summary>
private void CalculateTimeRemaining()
{
// Thread safety :-)
var progress = _progress;
// 0.0 to 1.0
var pct = progress / 100;
// Previously calculated estimate from the last tick
var oldEstimate = _timeRemaining;
// Fresh estimate (might be jerky)
var newEstimate = TimeSpan.Zero;
// The final estimate value that will actually be used
var finalEstimate = oldEstimate;
// Make sure progress percentage is within legal bounds (0%, 100%)
if (pct > 0 && pct < 1)
{
newEstimate = new TimeSpan((long)(RunTime.Ticks / pct) - RunTime.Ticks);
}
// Make sure the user gets fresh calculations when the process is first started and when it's nearly finished.
var criticalThreshold = TimeSpan.FromMinutes(1.25);
var isCriticalPeriod = progress < .5 || progress > 95 || oldEstimate < criticalThreshold || newEstimate < criticalThreshold;
// If the new estimate differs from the previous estimate by more than 2 minutes, use the new estimate.
var changeThreshold = pct < 0.2 ? TimeSpan.FromMinutes(2) : TimeSpan.FromSeconds(20);
var isLargeChange = Math.Abs(newEstimate.TotalSeconds - oldEstimate.TotalSeconds) > changeThreshold.TotalSeconds;
// If the previous estimate was less than 1 second remaining, use the new estimate.
var lowPreviousEstimate = oldEstimate.TotalMilliseconds < 1000;
// Use the new estimate
if (isCriticalPeriod || isLargeChange || lowPreviousEstimate)
{
finalEstimate = newEstimate;
}
// Decrement the previous estimate by roughly 1 second
else
{
finalEstimate -= (DateTime.Now - _lastTick);
}
// If the estimate dips below 0, set it to 30 seconds
if (finalEstimate.TotalMilliseconds < 0)
{
finalEstimate = TimeSpan.FromSeconds(30);
}
// Truncate (remove) milliseconds from estimate
finalEstimate = TimeSpan.FromSeconds(Math.Floor(finalEstimate.TotalSeconds));
_timeRemaining = finalEstimate;
_uiProgressState = new ProgressState
{
ProcessState = State,
PercentComplete = progress,
TimeElapsed = RunTime,
TimeRemaining = finalEstimate
};
}
