vision 4 version 4.7.0.16 will smart encode any material recorded with stand alone dvd recorder in all formats which takes 5-10 minutes as long as you leave aspect ratio alone
after upgrade online to 4.7.0.18 vision wants to recode everything 2hours approx
I have compared visual quality on both and there is no change
I backdated to 4.7.0.16 and all is fine
be warned
hope this helps someone