Preface: I turn smpte170m-in-720x480-as-H.262-in-vob, into 
BT709-in-1920x1080-as-x264-in-mp4.

Question: When I up-scale video to 1920x1080, are the dvdsubs also up-scaled?

Rationale: I'd like to know a way to see a dvdsub, as a jpg for example, both before and after scaling the video.

Rationale: I'm looking for ways to edit the dvdsubs in advance of SubtitleEdit's OCR so as to make the OCR job both easier (i.e. 'cleaner' and with wider spaces) and more consistent (i.e. uniformly sized character bitmaps across all dvdsubs, and eventually, across pgssubs, too).

Thanks--Mark.
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