This work has been sponsored by Sergio Ammirata.

This is off by default due to being more CPU/memory intensive.
Closed Captions can only be read in 10 bits mode.

Ref #5686

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Close #5686

Close #5956

No functionnal changes.

Also, fix a small leak in vlc_clone() error path.

Ref #7853

Close #7853

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

This patch introduces support for using V4L2 VBI devices for
reading NTSC EIA-608 closed captions.

This patch includes feedback from the vlc-devel mailing list from
the Oct 21, 2012, Oct 28, 2012, and Nov 18, 2012 submission attempts.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Signed-off-by: Konstantin Pavlov <thresh@videolan.org>

This avoids creating the playlist from the UI mainloop, which is not
typically a good idea.

pl_Get() does not create a reference to the playlist, so nothing is
leaked if the result is ignored. Calling pl_Get() ensures that the
playlist has been created.

Overwriting *fmt is safe nowadays.