Hi, in V15.1 the problem is solved (at least I do not experience the problem anymore), in the playback and making a selection on the timeline I notice a small delay between selection and starting playback, but still acceptable I think. So, try it and the batch problems of V14.9 and h.264 problems of V15.0 are past for you too. I also tried scene detection with a rather long ( > 1 hour) video; that did not crash (thank you ADOBE) , takes some time, but that is understandable / acceptable.