User operation prohibition
This article includes a list of general references, but it lacks sufficient corresponding inline citations. (May 2009) |
The user operation prohibition (abbreviated UOP) is a form of
Countermeasures
Some DVD players ignore the UOP flag, allowing the user full control over DVD playback. Virtually all players that are not purpose-built DVD player hardware (for example, a player program running on a general purpose computer) ignore the flag. There are also
Nevertheless, removing UOP does not always provide navigation function in the restricted parts of the DVD. This is because those parts are sometimes lacking the navigation commands which allow skipping to the menu or other parts of the DVD. This has become more common in recent titles, in order to circumvent the UOP disabling that many applications or DVD players offer.
Newer DVD players (i.e. post-c. late 2010) have, however, been designed to override the aforementioned counter-countermeasures. The DVD reader software inside the DVD player automatically generates chapters for parts of the DVD lacking navigation commands, allowing them to be fast-forwarded or skipped; pressing the menu button, even in these previously restricted sections, will cause a jump to the main menu.[citation needed]
See also
References
- ^ Hit Stop -> Stop -> Play and Other Tricks to Skip DVD Trailers and Warnings. Lifehacker, 2010
External links
- User Prohibited Operations flag documentation, Unofficial DVD Specifications
- U.S. patent 6,553,180
- Microsoft Windows DVD Info, Get Current UOPS, List of User Operations that can be controlled by this flag.