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Hi John,
No changes to the input files shown in the media library take place while editing your project. PowerDirector just saves the editing information in a tagged file with the pds extension. Unless you save such a project file, even the editing information is lost. It's only when the output file is rendered in the Produce section that the edited video is actually created and saved.
I hope it makes sense.
Kind regards…
Jirka
Hello John!
What Jirka says here is correct. I forget the terminology used, but in digital video editing, you're basically creating a new version of the content, without altering the original material at all. If the clip you start out with is 10 secs. in duration, If you've trimmed down to three, four or five seconds, you need to render it while it's on the timeline to get your new length, but you will still have the original 10-second clip for use at a later date. It's a non-destructive method of editing, compared to the practice of editing film... scissors or razor-blade in hand, snip, snip... another bit of film flutters to the floor! That was a very wasteful, destructive method in its day, It's far better now with digital editing!
Cheers!
Neil.