Sony DVHD? What is that? HDV? So you will be shooting HDV, 1080i60 (at 29.97fps...30fps) and you need to output to DVCPRO HD 720p (59.94fps...60fps)? Wow. Well, what you need to do is capture the footage as DVCPRO HD 720p...capturing HDV 1080i60 and then just editing in a DVCPRO HD 720p timeline won't do it...it'll be a nightmare and look like crap. ANd ProRes is out as you will be transcoding from HDV to ProRes, the from ProRes to DVCPRO HD...quality loss abounds!
You need to get a capture card that will cross-convert the footage from 1080i to 720p, and that will convert HDV to DVCPRO HD. Matrox MXO2 does this, AJA Kona 3 does this...both via hardware conversion. Then the Decklink HD series does this, but via software, so it isn't as good.
Without a capture card I shutter to think what your workflow would be.
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