While there isn't a widely known single file or specific standard named "," this filename typically refers to a video recording or user-guided content related to the Panasonic LUMIX G100 Go to product viewer dialog for this item. (often mislabeled as G7100 due to the "G" series naming).
Before recording, ensure your camera is configured for optimal video performance: g7100.mp4
features Nokia OZO Audio, which uses three microphones to track sound: While there isn't a widely known single file