For my YouTube channel I wanted to be able to record video within the Fuse emulator and then use that footage in Final Cut Pro X. Unfortunately FCPX does not support .fmf files, the Fuse Movie Format.
Luckily the Fuse Utils contain a nifty video converter called fmfconvert which can be used to convert the .fmf file to an .mkv video file as follows:
fmfconvert -i inputfile.fmf -o outputfile.mkv
Then the resulting mkv file can then be converted to mp4 by using Handbrake: