On the A7S III, an interrupted recording usually ends up as an .RSV file in the CLIP folder, or an .MP4 that's the right size but won't play — after a battery dies, a card is ejected, or the camera powers off mid-take.
Drop the file in your browser. Preview in seconds. Nothing uploads.
Drop your file — free preview →A clip named like C0012.RSV in PRIVATE/M4ROOT/CLIP, or an .MP4 that's the right size but won't open anywhere. Either way the camera wrote the footage — it just never got to write the index at the end that tells a player where each frame is.
Recovered here: XAVC S and XAVC HS recordings from the A7S III, 8-bit and 10-bit.
Sony writes video, audio and timing metadata in a fixed repeating pattern, and the codec settings travel inside that metadata. footage.repair walks that pattern frame by frame and writes a fresh index, so audio stays in sync even on recordings several hours long. No reference clip is needed, and nothing is re-encoded — you get back exactly what the camera recorded.
Copy the whole card to your computer first and work from the copy. Don't format the card or record over it until you've checked that the recovered file plays.
The preview is always free. During early access, full recovery is free for every file size too. If the recovered file doesn't play, email me at brian@footage.repair.
Drop your file — free preview →Other Sony bodies: FX30 · FX3 · A6700 · ZV-E10
See every supported camera and format on the cameras page, or read the FAQ for how the recovery actually works.