Re-encoding Sony HXR-NX80 XAVC S footage to H.264 codec is necessary
if Premiere Pro CC, CS6 or CS5 won't work with your video smoothly.
That's because H.264 codec provides better performance during editing,
faster render times, and better color quality for compositing. This
guide teaches you the basics of how to convert Sony HXR-NX80 XAVC S
media to H.264 codec for editing in Premiere Pro with very good
performance.