Re-Running Part of a Project
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intermediate_stages  
 
The three silver buttons shown in the graphic above are used for re-running or re-starting a Project at some intermediate stage and letting it run through to completion. As was mentioned in Starting a Project, stages of a project can be re-run. The key word here is "re" which means the project has been run before.  

 
It is crucial to understand that data is added to the project file as the project progresses from stage to stage. For example, after the capture stage completes, the project contains the number of frames and time captured, as well as potential chapter points. If using "Smart Chapter Selection", the project file would be further altered after the authoring stage, to contain the optimal chapter starting points after having performed the pruning algorithm.  
 
The key point is that a project file you just created from scratch and saved is not the same as a project file that is automatically saved to the default project directory at the completion of a project. The reason is that the project file automatically saved at the conclusion of a project has additional data which is crucial to being able to re-run intermediate stages of the project. In other words, there is data in the project file which cannot be manually edited in the project property page dialog.  
 
 
 
This functionality of starting a project at some intermediate stage can also be used to finish a project that may have been stopped or failed for some reason. In this case, it is useful to understand the pre-requisites for starting a stage at any given point. The following table lists the pre-requisites for each intermediate starting point.