A dead battery or a hard knock mid-shot can leave an Osmo Action
recording as an unfinalized .MP4 — the file won't open, but the frames the camera already wrote
are still sitting on the card.
Drop the file in your browser. Preview in seconds. Nothing uploads.
Where this stands today: the preview works and shows you the footage is really there. Full-file recovery for DJI isn't wired into the automatic flow yet — email me and I'll get you the recovered file directly while that's being finished.
Osmo Action records HEVC video with the codec parameters stored outside the cut file, so a short donor clip — a normal, working recording from the same camera — supplies what the broken file is missing. A few seconds is enough, and like everything else here, it isn't uploaded.
Drop your DJI file — free preview →See every supported camera and format on the cameras page, or read the FAQ for how the recovery actually works.