What causes it
Action cameras get used in ways other cameras don’t. They’re mounted on helmets and handlebars, run until the battery is empty, left recording in the heat, and knocked around.
Most lost footage from them comes down to one thing: the recording stopped without the camera stopping it.
- The battery ran out mid-recording.
- The camera overheated and shut itself down.
- A crash or a hard knock cut the power or unseated the card.
- The card couldn’t keep up with the recording and the camera gave up partway.
A camera finishes a video file when you press stop. If it never gets to, the footage is on the card but the file is incomplete.
Two other things are specific to these cameras. Long recordings are split into several files, so one take is spread across a set of them. And the cards wear faster than in ordinary cameras, because they’re filled and cleared constantly.
What to do right now
- Take the card out of the camera. Don’t record anything else on it.
- If the camera offers to format the card, decline.
- Work out where the footage was: on the removable card, or on the camera’s internal storage. It matters a great deal.
- If the card still opens on a computer, copy everything off it, including files that won’t play.
- Keep the camera. With a different card in it, record a short clip at the same settings and stop it normally. That clip is useful as a reference for a repair.
- Note what happened: battery, heat, crash or water.
What’s realistically recoverable
A recording cut off by power loss is often repairable. The footage is there and the file needs finishing. This is a Complex recovery. See recovered video that won’t play for how that works.
A deleted or formatted card that still reads is usually Standard, as long as nothing has been recorded since.
Preview files. Some action cameras save a small, low-resolution copy alongside each clip for playback in the camera or app. When the full clip can’t be recovered, that smaller copy sometimes can. It isn’t the footage you wanted, but it’s something.
Parts of a long recording can come back with generic names. Sorting them by time puts them back in order.
When it isn’t
- Internal storage. Internal storage on action cameras is often unrecoverable once TRIM has run. TRIM is the camera telling its storage that deleted space can be erased. Once the storage has done that, there is nothing left to read. A removable card in the same camera is a different and much better situation.
- Footage that was recorded over. If you kept filming on the card afterward, whatever was overwritten is gone.
- A card that isn’t detected at all. That’s a physical case. Some of these I can do at my bench, quoted after evaluation. The rest I refer out, at no charge.
- The camera itself. I recover the footage. I don’t repair cameras.