v. 1.2.9.2 (same behavior in 1.2.9.0): When creating .mkv from Dune (movie), and trimming approx. 18 seconds from start, on playback there is no audio (although track appears to be present in output file) (tried several different players). If doing the same operation without the trim, playback sounds fine. On other films, the trim works fine, so I'm not sure why it doesn't on this one.