QMovie plays at only one speed

[RogueWarrior]

I'm loading up an Animated GIF file into a QMovie and drawing it onto a QPainter but it only plays at a single (and incorrect) speed. Qt seems to totally ignore the speed in the file and plays it back slower than it should and calling speed on the QMovie with a value faster than 100 percent has no effect. I'm using Qt 5.9.2.