Padster Hello I came upon this purely by chance. To stop 'Building Preview' from messing up your videos and putting the audio out of synch, you have to click on each video clip and a green bar will progress across the top. Once all clips have these green bars you won't get the 'Building Preview' message. Hope this helps someone Best wishes, Padster
borate Caching should complete without the need to click each clip, but it can take time. Especially on lengthy, complex projects, use the 64-bit latest release. Many changes have been implemented 'under the hood.'