Notes about the SFK file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The SFK file type is primarily associated with 'ACID PRO' by Sony Pictures Digital Inc.. SFK files are basically intended to help draw the representative waveform on the screen. They are often associated with .AVI files.