Video of the week

First day of broadcast after some epic conditions the last three days, so could be last chance to see them in the breeze!

I shoot in 60fps and export in 30fps. This means I can have perfectly smooth half speed like you said above, and that 60 frames in to 30 divides nicely for the majority of the footage and helps processing time. 

Of course, the pro's would always shoot in the intended frame rate. So they'd pick 30fps for export, then film in 30 fps. But any segments they wanted in slow motion they would film in 60 or 120. The reason for that is the motion blur / shutter speed is always correct for the frame rate. Plus, when you increase frame rate it usually decreases the biterate of the frame, so even if it's still the same definition you'll get more noise shooting in an unnecessarily high framerate. That noise then makes it hard doing colour.  

The difficulty sailing is you tend not to know when you want slow-mo and when you want real time until after, so it's not possible to preset in this way. 

Will I-Movie not allow you to export 30fps @1080p?

To be honest, the problem is mainly with YouTubes default quality setting when it processes uploads for higher frame rates. Meaning viewers can only watch in HD at that higher frame rate. Most peoples broadband copes with streaming 1080p at 30fps, but upping that to 60fps means people need double the broadband speed. So the viewers are left with this huge quality jump of either watching in 480p/30fps or 1080p 60fps!