Fix a corrupted NVIDIA ShadowPlay recording that won't play.

Why ShadowPlay clips come out broken

NVIDIA's GeForce Experience / ShadowPlay records at high bitrate straight to an MP4, and it writes the actual footage as it goes. The small block that tells a player how to read that footage — the moov atom, essentially the file's table of contents — is only written when recording stops cleanly.

If the game crashes, the driver resets, the PC hard-locks, or Instant Replay's buffer is cut off mid-flush, ShadowPlay never gets to write that index. You're left with a full-size MP4 that every player opens, fails to find an index in, and refuses to play — often with no error at all, or "moov atom not found."

The footage itself is almost always intact, which makes this one of the more recoverable capture failures. FileFix reads the video and audio that's present, reconstructs a valid index around it, and rebuilds a file that plays normally. You see exactly how much we recovered in a free preview before paying anything.

The one case we can't fix: if the crash killed recording before any footage was flushed to disk — a 0-byte or near-empty file — there's nothing to rebuild an index around. When that's true we tell you plainly and don't charge you.