Use a ncurses timeout() of 1 second, which will block when waiting for input

We use 1 second so the position slider is refreshed correctly
We could use 500ms to not miss any change, now the slider can make a
2 seconds jump, see Nyquist-Shannon theorem

Add a variable to the context to exit the main loop as soon as the exit key
is pressed, so we don't have to wait one more second: vlc_object_alive()
doesn't return false immediately after calling libvlc_Quit()

This reverts commit 103ae418.

This cannot be good: either it is invalid or incomplete. More informations
are needed to properly fix the issue seen.

 It has some random effects depending on the url (including use of
uninitialized pointer).

It is not yet complete:
 - packed YUV support is lost
 - rotation modes are lost (it needs change to the vout core).

This reverts commit 4d9bf01b.

Signed-off-by: Rémi Duraffort <ivoire@videolan.org>

Old behavior is accessible via vmem-preserve-aspect-ratio.

I believe this is the most sensitive defaults even though this is not the current libvlc API. I wouldn't expect client breakage, but I may be mistaken here. Please shout if so.

(Note, This is being used to do the iOS thumbnailing)

Signed-off-by: Pierre d'Herbemont <pdherbemont@free.fr>

Signed-off-by: Pierre d'Herbemont <pdherbemont@free.fr>