Fixed error handling for setting default duration on failure

Previously, failures in getting the total duration resulted in queue status updates and interruptions due to errors. Now, if we could not determine the duration, we return zero. This will at least allow us to simply convert without a progress bar.

kernel/app.go

@@ -84,10 +84,7 @@ func (a App) RunConvertor() {
 
 			totalDuration, err := a.convertorService.GetTotalDuration(&queue.Setting.VideoFileInput)
 			if err != nil {
-				queue.Status = StatusType(Error)
-				queue.Error = err
-				a.Window.GetLayout().ChangeQueueStatus(queueId, queue)
-				continue
+				totalDuration = 0
 			}
 			progress := a.Window.GetLayout().NewProgressbar(queueId, totalDuration)