: Many DVR systems use prefixes like "olg" or "ch" followed by a 14-digit timestamp (YYYYMMDDHHMMSS).
: Most cameras embed hidden data like the date, time, and camera model. You can use tools like the ExifTool or Jeffrey's Image Metadata Viewer to see if it contains a timestamp or GPS coordinates that reveal its origin. olg003039016502020.jpg
If you are seeing this filename in a programming error (like a "cannot identify image file" error in Python), it usually means the file is either or not actually a JPEG . : Many DVR systems use prefixes like "olg"
IOError: cannot identify image file · Issue #3727 · python-pillow/Pillow olg003039016502020.jpg