You can output 4:2:2 but you can’t record it to BetaSP. BetaSP is an old analogue format that is not good enough to record a 4:2:2 signal. BetaSP has about 3/4 the luma rez of your DVCAM, so you’re just dropping quality mastering to it. Now, if you master to DigiBeta, that’s a different kettle of fish, and indeed, for SD, is the best format to master too.
Graeme
– http://www.nattress.com – Film Effects and Standards Conversion for FCP