Lazaclip

ZV-E10 II RSV file: recovering a clip that didn't save

Updated 3 November 2026

You were twenty minutes into a talking-head video, a tutorial or a walk-and-talk when the ZV-E10 II went dark. Or the card came out a second too early. Now the clip doesn't show up where you expect it, and when you look at the card on a computer there is a file ending in .RSV. This guide explains what that file is and how to get your video back.

Why the clip turned into an .RSV

While the camera records, it writes the video and sound into a working file with the .RSV extension. When you stop, it finishes the file by writing its index (the list of where every frame and every piece of audio is) and renames it to .MP4. If the power goes first, that never happens. Your recording is in the file, but players can't read it without the index. Background: What is an RSV file?

The ZV-E10 II records XAVC S and XAVC HS (and, depending on settings, XAVC S-I) into .MP4 files, so an interrupted clip in any of these formats ends up as an .RSV.

If you usually move clips with your phone

Many vloggers transfer clips to a phone over Wi-Fi with a companion app. The interrupted recording is not a finished video, so it most likely won't appear there, and the camera's own playback may not show it either. That doesn't mean it is gone. To see and copy the .RSV, you need the card itself in a card reader on a computer.

Keep the card safe

  • Don't format the card, in the camera or anywhere else.
  • Don't record your retake on the same card. The ZV-E10 II has one SD slot, so this card holds the only copy. Use a second card for the retake.
  • Don't delete the .RSV.
  • Copy it to a computer. In File Explorer, open the card and copy the whole PRIVATE folder. The video files are in PRIVATE/M4ROOT/CLIP; photos are elsewhere (in DCIM).

Try the camera first

Some Sony cameras try to recover an interrupted clip on their own when you put the card back into the same camera with a charged battery. It doesn't happen every time and we don't know in advance whether your ZV-E10 II will do it for your clip, but it is free. After copying the card, charge the battery, put the card back into the same camera, switch on and wait. If a message about recovering data appears, let it finish and don't switch off. Then check the CLIP folder for a new .MP4.

Turn the .RSV into an MP4 on Windows

If the .RSV is still there, it needs a new index. Lazaclip is our Windows 10/11 program for exactly this (we make it, so this is our own product we are describing). It works offline and doesn't upload your video:

  1. Open the card or the folder you copied. The program shows each .RSV and whether it can be rebuilt.
  2. Click Preview 10 s: the first ten seconds of your clip, watermarked, open in your video player. The scan and preview are free.
  3. With a license, save the full video as an .MP4 on your PC and edit it like any other clip.

The video and audio are not re-encoded: the program keeps the recorded data as it is and only writes the missing index around it. The original .RSV stays untouched.

Has it been tested with the ZV-E10 II?

No, not yet. Our tests so far are on A7S III recordings (XAVC S, XAVC S-I and XAVC HS, rebuilt without a reference clip, with frames and audio identical to the original up to the last unfinished group of frames) and on the original a7S. The ZV-E10 II uses the same XAVC S / XAVC HS recording format; the free preview shows whether the program can read your file before you pay.

What you get back

  • Everything up to the last second or so before the cut. That final moment was never completely written and can't be rebuilt.
  • Your original sound, as the camera recorded it from its microphone or the mic you plugged in.
  • An .MP4 about the same size as the .RSV, so make sure your PC has the space.
  • If you recorded in XAVC HS, your editor or player needs H.265 support.

Making it less likely

  • Long talking-head takes use a lot of battery. Start them full, or use external power if your setup and the camera manual allow it.
  • Don't pull the card or switch off until the camera has stopped recording and finished writing.
  • Carry a second SD card, so a problem card can be put aside without stopping your shoot.
  • Cold weather empties batteries quickly; keep spares warm in a pocket.

Also shooting on an A6700? See the A6700 guide. For a compact full-frame body, the A7C II guide.