| Version | 4 |
| Variant | specified in RFC 4122 |
| urn | urn:uuid:086f3693-b7b3-4f2c-9653-21492feee5b8 |
| Hexdump | 086f3693b7b34f2c965321492feee5b8 |
| Bytes | ␈o6ô╖│O,ûS!I/εσ╕ |
| UUIDv4 | version (4) + randomness |
| (would-be) MAC Address | 21492feee5b8 |
| (would-be) is_local bit | True |
| (would-be) is_multicast bit | False |
| (would-be) MAC Manufacturer | None |
| (would-be) MAC Date | None |
sei_user_data Insert a string as SEI unregistered user data. The argument must be of the form UUID+string, where the UUID is as hex digits possibly separated by hyphens, and the string can be anything. For example, ‘086f3693-b7b3-4f2c-9653-21492feee5b8+hello’ will insert the string “hello” associated with the given UUID.