[Mike Houston]

The documentation states this: “To manually change a span duration, drag either end of a span.” So once you have dragged the span, to equal the length of your clip, you have to spot check it to make sure that it’s correct, then freeze it, then render it. I had to do a 7 minute clip like that yesterday, because my “black background” wasn’t infinity black. It’s a bit tedious, but I had great results. Don’t always trust the flip out monitor on your 4:2:0 camera. LOL