If you render your HD project out in *.m2ts in Vegas 9,then you can bring the file back onto
the timeline and then make any changes to the project.
When you are ready to render out again the smart render will come into play, only
rendering the parts that are required.
You do need to make a new *.m2ts template with no audio for this to work correctly
(use ac3 for the audio separately)
DVD-A Blue Ray will take them with no re-rendering as well, saving more time
The m2ts extension is found in the AVC templates
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