By the way, the event management seems quite broken. Events may occur
before _Create returns (even before this commit)...

Avoid objects being detached asynchronously too early.
Side effect is that you cannot free your children in the destructor
(that would be a reference loop).

Fixes payload type overflow especially when using sout keep/gather.

It will allow correct YUVP rescaling and even anti-aliased support
if someone do it.

It will avoid useless picture copy.

(By the way, snapshot-id looks like a write only variable...)

I do not know how the Qt4 itnerface reference counts VLC objects when
it comes to the menu. However, it is a bit suspicious that it seems to
need no yield/release (reference inherited from something else?).

additionally, save the user's selection to check for updates as soon as it is changed, so we don't ask multiple times in case of a crash

Note the libdca currently does not support DTS-ES (6.1/7.1)
Also, 3F1R is still untested for DTS, because I have no such sample.

The window is always created with a pre-existing video output,
and destroyed before the video outout.

Besides, using object IDs is not safe.

Maybe, someday will bother to actually fix this.