Panasonic video repair
Panasonic video repair: what it usually means
Panasonic and Lumix camera files can become unreadable when the camera shuts down unexpectedly or a card fails during finalization.
If the file has real size, there may still be recoverable frames and audio inside. The safest first move is to leave the original untouched and create a separate repaired preview.
Do not trim, re-export, repeatedly convert, or overwrite the damaged file. If you need to experiment, work from a copy and keep the original exactly as it is.