Fix the rawvideo codec when visible_pitch != pitch. (And simplify code) This should fix partial screen captures using non multiple of 16 values.

Add some missing symbols in a blind attempt to fix the buildbots. Feel free to revert if this is wrong.

This is the last fix for libvlc.dylib compilation on Mac OS X.

This reverts commit 96cc9c26.

This commit is reverted because we are using a regexp to determine the list of exported symbols in libvlc. However some private symbols start with libvlc_, this produces (here on Mac OS X) a nmedit error about symbols not being found while exported. A solution is to externalize those private symbols, hence using VLC_PUBLIC_API.

Feel free to come up with a better solution.

Fix some warnings
Get the pixmaps from the right directory

qtcapture: Tab fixes, plus attempt to get the real PTS. We still really do lag compared to PhotoBooth...

qtcapture: New access_demux module (QTKit based) to capture video from your iSight Camera on Mac OS X.

Usage: 'vlc qtcapture://'.

This is a 2 hours hacked module. We don't grab sound yet, and there are a lot of FIXME.

Note: For some reason QTKit needs a the main thread to be a cocoa thread. Don't expect it to run with -I dummy for instance.

(that's one of the isight's chromas)

O_APPEND puts the file pointer to the end after _each_ write.
We want to put it at the end (only) after open.
Also allow reading/seeking stdout, as it could be a redirected file
(of course, it won't work if it's a terminal)