Using Trimmer for clips with reduced frame rate
I have some 50fps clips with audio that I want to slow down using the clips' properties - eg reduce to 25fps. When I play them in the trimmer they stop just before 50%. I can scrub further but if I try to play from a later point I get 'Could not start playback' and a black window. I have the same effect if I drag the clip into the editor, but then it is obvious that the audio is causing the problem - the video is now longer than the audio, so the editor also stops playing at the end of the audio. I can overcome this in the editor by unlinking the video but I should be able to use the trimmer so I can select the sections I want. I don't see any way to unlink the audio in the trimmer so do I need to add this to the wishlist, or is there a cunning solution?
(I imagine this is already covered somewhere on the forum but I didn't really know what to search for)