You’re 30fps footage is always going to look a bit choppy when playing it back on a 24fps timeline because it’s going to be skipping frames or trying to blend them. It’s never 100% perfect.
Well, I say that. There are ways around it but, depending on the style of footage, you can get pretty good results using a convertor with motion estimation or some kind of pixel flow calculation. In Compressor in the Frame Controls section (You may have to turn it on by clicking the little cog button) there is a group called Retiming Control . In that group change the Rate Conversion to ‘Best (High Quality Motion Compensation)’ and check the radio button that says ‘so source frames play at ##.## fps’. The FPS are set in the Encoder settings.
Sean
Pi Digital