I just found this last week, and it was tremendously useful. I had filmed an entire dive competition with a small poolside camera, and wanted to cut it up into clips of individual dives. LosslessCut let me play it back as fast as I wanted (a little over 300% speed was the fastest I could use to listen for the gaps between divers), tap 'B' every time the scores were announced for a dive, then click export after I'd done that for all the dives. It took me less than an hour to split a 3 hour competition into nicely labeled clips I could share with each diver and their coach.