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Sony FX3 .RSV file recovery

Your FX3 stopped mid-recording and left a .RSV file. Here’s how to get the clip back.

The FX3 (ILME-FX3) records XAVC S, XAVC HS and XAVC S-I, 8- or 10-bit, up to 4K 120p, with LPCM sound. While it records, it writes the clip to a temporary .RSV file in PRIVATE/M4ROOT/CLIP/ and turns it into an .MP4 when you press stop. If the battery dies, the card fills up or the camera overheats first, the .RSV is left behind and won’t open.

The FX3 is often used for long event and documentary takes, where a full card or flat battery is the usual cause of a .RSV.

How to recover it

  1. Stop using the card and copy everything on it to your computer.
  2. Open rsvrescue.com and drop the .RSV from the copy. It’s read in your browser; nothing is uploaded.
  3. Watch the free 15-second preview with sound.
  4. Pay once for the file and save the repaired .MOV, which opens in Premiere Pro, Final Cut Pro, DaVinci Resolve, QuickTime and VLC.

RSV Rescue reads the FX3’s own settings from the .RSV itself, so you don’t need a reference clip, and it handles clips where you changed settings partway through. More detail: how to recover a Sony .RSV file.

Why it happened, and how to avoid it next time

See what an .RSV file is and how to avoid .RSV files.

Try the free preview → Drop your .RSV and watch the first 15 seconds of your recovered clip before you pay anything.