A month or so ago Panasonic released a firmware update to the GH4. The biggest feature that got a lot of buzz was a 1:1 shooting ratio, enabling better use of anamorphic lenses. But there was another interesting feature listed that caught my eye. Way down at the bottom of the new features list was this final note:
Loop Recording function is added, with which the camera keeps on recording video while deleting the old footage automatically.
After some research and talking to a Panasonic engineer, it is indeed like a pre-recording feature, though a little clunkier. If you turn the mode on and hit record, the camera will roll. Then once the clip hits the 10 minute mark, it will go delete the first 2 minutes of the clip while still recording.
So say you’re filming Planet Earth, trying to get a shark breaching the water. You’d start the camera and just let it record while you wait for the action. It will keep deleting the beginning of the clip while it records, adding the new footage to the end and just cycling through. Then when you get the action, you stop recording. So now you’ve got a 10 minute clip, of which the part you’re interested in is in the last minute or so.
Not as streamlined as a simple 30 second pre-roll buffer, but it can get the job done if you’re waiting for a quick action shot. Apparently there’s no plans right now to add an actual pre-roll mode.