Originally Posted by ShowsOn
This is just my speculation, but I wonder if it has something to do with the idiotic advanced copy protection? Blu-rays play back inside of a Java Virtual Machine, it is possible that there is a set series of steps that the Blu-ray needs to load in that can't be saved in memory.
I doubt that unless it also prevents them from implementing general bookmarking features. Basically, they just need to use whatever underlying feature/functionality they use to implement bookmarks to automatically do what we want for this, eg. whenever the movie is stopped via the stop button, etc.
Near as I can tell, Disney was probably the first to do auto-bookmarking on some of their titles (as I noticed back in 2009, IIRC). Some of the TV series BD sets also implement some sort of auto-bookmarking, eg. the Lost series seemed to do that.
However, if you're talking about having the player itself automatically handle it rather than the disc's BD-J software, then yeah, I guess that could possibly be part the reason w/ the current spec at this point. Maybe they need to add to the BD spec in order to properly allow players to automatically do this w/out somehow creating a hole in their copy protection scheme -- I really don't know, but am just hypothesizing based on what I do know about hardware/software design/engineering in general.
Without changing the spec, maybe what player makers *might* be able to do is piggy-back a bookmark command onto the playback stop command if the spec allows that and if the disc's software doesn't somehow prevent the use of bookmarking -- this latter part might be regardless of whether the disc software explicitly implements the usual UI-accessable bookmarking or not. Really hard to know w/out solid knowledge of the spec...
_Man_