Hm... Isn't there a filter in VDub that does this?
As to the idea of hacking FixVHS for this, I would think so. Basically, you would be looking for a sudden white line (vertical only?) that doesn't appear in the preceeding and following frames. (Sort of a two temporal FixVHS.) The FixVHS repair code would probably be very good for smoothing in the scratched area.
I would expect this filter to be relatively slow since you probaby would have to load 5-10 frames at a time. (Just like TemporalSmoother does.)
I'd need to see some video on this before I could say either way.
For now, however, someone else will have to work on this. I'm working heavily on a new Logo remove filter. (To be released very soon.)
If someone wants to work on this, let me know, I'll send you the source to FixVHS. (the source to FixVHS is not ready for public release - > its a mess)
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