Oregon's Silicon Forest has some exotic denizens, but few can compare with Video Encoding, the dot com conjuring enhancements to your viewing pleasure in cinemas, on the internet, your home television, and when you fly commercial air. This two-year-old enterprise, created by Portland's Brian Maguire, practices, by Brian's own designation, a black art. And does it so well it is a major supplier to Stephen Spielberg's Dreamworks film production company; among other's, if you've seen Shrek or Saving Private Ryan, for instance, you've been exposed to what Video Encoding creates. The recent entertainment rage called DVD (Digital Video Disc) is...