Update: I recorded 25:00 of video then battery pull with no issue on my RP. All ~4GB MP4 segments were fine, with naturally the last one missing Don't let the recording reach the 29:59 legacy limit - if you do the camera will save the NVRAM settings when it automatically ends the recording The Ridgecrop formatter tool link I posted for Windows only worked once for me. After that the camera wouldn't accept any cards formatted with it. I then tried the formatter built into OS