FGRAB -- HIGHLY EFFICIENT SCREEN RECORDER
fgrab was not ready for the latest Mac operating system since the functionality of some OpenGL APIs had altered. But fgrab was not mothballed, the super-fast utility has been partly rewritten and revived. The final version 1.5 is available now. It is compatible with OS X 10.10 Yosemite and OS X 10.11 El Capitan.
With fgrab, capture any action on your screen and save it as a screen movie. After recording you can immediately play it back without a time-consuming export procedure (the playback functionality requires the fvf_player helper application which is available separate in the Mac App Store!). Use the FastCut video editor for further video processing (the advanced 4K video editor from the same developer).
Under the hood fgrab has a highly sophisticated and efficient capture engine. fgrab only captures the area of the screen that is in motion. CPU load and the amount of data written to hard disk depends on the screen action. No screen action implies no CPU load / no data written. fgrab is way faster (more efficient) than any other tool on the market (learn more in the enclosed user's guide). Hence creating fgrab necessitated great programming efforts.
In addition to the video capture one can record the mac system audio and a voice-over (notice that in order to record mac system audio you have to additionally download/install the required 'Soundflower' kernel extension).
After the recording the screen movie can be saved as .fvf (fgrab video format). Double-clicking this file brings up fvf_player (must be installed separately, available for free in the Mac App Store, it is required) which allows you to set in and out points (among others) to prepare the insertion to FastCut movie projects. .fvf is a custom format made for a special purpose that is screen capturing.
Please notice that the fvf_player helper application must be downloaded separately from the Mac App Store! Once again, it is required for playback.
Finally, one last thing: fgrab is pronounced [ɛf]-[græb]. Now, it's clearly time to stop reading this and download fgrab!