When I capture or import HDV footage into pro14+ it is fine untill I start to edit the clip. If I shorten the clip, then the sound then becomes out of sync with the movie. This does not happen in standard definition editing. How do I stop this?
Try the following: Right after capturing/importing your HDV material into the program, and before you start editing, right-click on the video track (in timeline view) and choose the option to create a new frametable. This might help. Also, what you notice might be more of a preview problem, possibly performance-related. In this case the problem wouldn't show up on the encoded result and might therefore just be a minor annoyance while editing. There are a view things in the program settings you can optimize to improve preview performance, e.g. the preview display resolution under the "Video/Audio" tab.
I've tried that, and it makes no difference. I feel that its bad when a product advertises itself to be able to do a certain function, when it cannot! I have recently invested in a high spec computer specificaly for editing HDV and thought Magix would do the job. Its useless if it cannot keep in sync!