This Widget (base QLabel) is designed to show the cover art. It handles right-click, and show a context menu that has only one entry:

- Download cover art

When the user clicks it, vlc downloads the cover art (or finds it in the cache), and displays it when downloaded

This commit allows using the bridge-out and bridge-in module to
configure a placeholder stream. This placeholder stream replaces the
input stream if it dies for more than place-holder ms.

Example configuration:
 # The input
 new test broadcast enabled
 setup test input /home/antoine/media/wall-e/Sample.avi
 setup test output #duplicate{dst=bridge-out,select=video,dst=bridge-out,select=audio}

 # The placeholder
 new master broadcast enabled
 setup master input /home/antoine/media/wall-e/wall-e.avi
 setup master output #bridge-in{placeholder,placeholder-delay=5000}:display

 # control test play
 control master play

Placeholder and input should have the same format (aspect ratio, dimension,
codec, ...). Connect to VLC's telnet interface and issue some
"control test play" and "control test stop" commands to simulate input loss.
The placeholder stream should kick in after 5000 ms (5 s) of input loss.

This commit adds an in-name property to bridge-out and a name property
to brige-in which allows selecting which bridge-out go to which bridge-in
modules. Default behvior is unchanged (everything goes to the same
bridge-in).

 While it is great for (some) streaming cases it is really wrong for saving
to a file for example and/or without using the gather module.

 If you have read how to use the gather module, you probably have read enough
documentation to add sout-keep...

Properly malloc(), memcpy() and free() the quantizer matrix. (Somebody please patch libmpeg2 so we can postproc it's output too!) Thanks to fenrir for his help.

This reverts commit df65d657.

This prevents rendering subtitles multiple times (but at the cost of a
picture copy when subtiles are rendered).

Add some aliases
Some : -> ://

DEMUX_GET_PTS_DELAY should returns microsecond.

You should NOT remove caching to PTS to create PCR.
It was probably a workaround for the previous bug. It could explains
the problems with TS over RTP (for TS with small pcr/pts delay that is, not
created by VLC)

Implemented missing DEMUX_CAN_* query.

Encoders are allowed to change the input format. Hence we need to check that our second attempt to spawn an encoder didn't do so.