When I shoot 120FPS video on the iPhone 5s, I can easily export it as a 30FPS video, slowed down four times. But I want to export it as a 60FPS video, slowed down twice.
Ideally, I'd like to do this without transcoding the video (because that reduces quality and increases file size), but merely having an app change the fields in the header to say that rather than playing for 1 minute at 120FPS, this video should play for 2 minutes at 60FPS.
I'm looking for:
- A Mac app, but if that's not possible, an iPhone app will do.
- A less expensive ($20) or free app.
- A GUI app, rather than a command line one.
I have iMovie 10, iPhoto 11, Picasa and Lightroom 5, but none of them seem to have this function. iMovie 10 can only export a 30FPS video, not a 60FPS one.
Is there any software that does this?