Tony7671

I'm having a lot of problems with performance at the end of the sequence. The context is that I'm editing a religious service which is usually about 20-25 minutes long. All I want to do is add a title card and the beginning, cross-fading into the video, and then a crossfade into an end title. No problem with the start title - software is responsive, and I can preview the video clip to trim it appropriately, and check the crossfade is in the right place. The problem is when I go to the end of the video clip and try to add a closing title card. The user interface becomes unresponsive, and during previewing it does start after a prolonged pause after clicking "play", but often only the audio and sometimes some jumpy video - certainly not enough to check I have the transition to the closing title card correct. I occasionally see "Building preview. Please wait". I do wait - sometimes tens of minutes to see if it can catch up with itself, but it often doesn't seem to. In fact, for the video I edited this evening, it's been open in the editor for a couple of hours, and for the preview near the end, the audio and video are now out of sync. For the exported video, where I managed to have a reasonable guess as how to trim the main video clip, it is absolutely fine. I read the remarks about having a sufficiently powerful machine. I'm editing on a Lenovo Yoga 710 with a 2.5Ghz Intel i7-6500U and an SSD drive. I'm quite patient - while I recognise this isn't the fastest machine possible, I would be quite happy to wait for a couple of minutes for it to build a preview cache, but I seems like a couple of hours isn't enough to get something that will give a smooth preview of the output. I can usually achieve the result I want, but it involves a lot of guesswork since I can't fully watch what I've set up before exporting it. Is there anything I can do, short of buying a top-end machine, to improve things? Thanks, Tony