Cutting a project with CS5.5.2, using 720p (AVC-Intra100) footage on a 720P timeline with Blackmagic Design preset. Have tried slowing down several shots using "Speed-Duration" feature (some 50%, some 75%). The result is noticeably jerky motion. And when I try speeding up a shot, say 115% or more, it's not smooth either.
Any suggestions much appreciated. I don't have AE, so I can't try that.