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.

Given the (non) quality of this code and the use of the feature I am all thefor removing everything around OPENGL_MORE_EFFECT.