I bought a GoPro Hero 3 Black and I'm trying to import and slo-mo a 1080p 60fps file into iMovie '11 (v9.0.4), running on OS X Lion (10.7.5). I have an epic bike crash I want to put into high-def slow motion.
1) The video file off of the micro SD card has a H.264 codec, and has an MP4 file extension. This file will
import into iMovie '11, but the speed of the playback can't be changed. The options to speed up or slow down the clip just aren't there (I have checked online iMovie '11 tutorials on changing the speed of playback, but somehow these options don't show up in my program with these files). EDIT: This is the case whether or not I "optimize" the file according to iMovie '11 (File --> Optimize Video)
2) GoPro's support website recommends that I use their free converter, Cineform Studio (v18.104.22.168), to convert the GoPro files into a compatible format. Here is their website with their steps, which I followed: http://gopro.com/how-to-prepare-video-files-for-editing-apple-mac/
. Note: there is no option for choosing the output file format, only the resolution (1920x1080) and the frame rate (59.94p), neither of which I changed.
3) The output file from Cineform Studio is a .MOV with the following codecs: CFHD, Linear PCM and Timecode. This file is grayed out when I try to import it into iMovie!
I find this particularly ironic, as the file prior to conversion was more compatible with iMovie than after the conversion!