Your mileage may vary with Encore 2, but my experiences haven’t been overly positive when using it with the Avid/Sorenson combination. Previously (1.5), I’d export a mixdown QT ref, transcode with Sorenson, and import into Encore. This work famously for a long while. Once I upgrade to Encore 2, I started getting spurious “bitrate too high” errors from my Sorenson transcodes. Additionally, transcoding directly in Encore produces fielding issues. I’m a minute from downgrading to 1.5.