mxf: Add the UL for the MPEG2VideoDescriptor
mxf: Support AAC

Update mxf_set_audio_pts to use the container-provided information.

The UL is marked as "to be changed in the future", but the current
samples in the wild do use it.
Merge commit '747cd9560c2248ff2834f29cd2190646330e4676'

* commit '747cd9560c2248ff2834f29cd2190646330e4676':
  mxf: Add the UL for the MPEG2VideoDescriptor

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '369380e1c4c6fc9b0d9ff04ec23d46b252ba7110'

* commit '369380e1c4c6fc9b0d9ff04ec23d46b252ba7110':
  mxf: Support AAC

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avformat/mxf: added ULs for demuxing avid media composer mxf files

The AAF SDK refers to these ULs as Legacy. These ULs are the same as the
ones found in FFmbc's version of mxf.c and the ones found in libMXF
Fixes Ticket#1554, Ticket#3100 and Ticket#3450
alacenc: increase predictor buffer

This change is almost cosmetical only, and reduces the changes needed to
fix the 24bps case.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
alacenc: fix extra bits extraction

The raw coded bits are extracted prior to decorrelation, as is correctly
performed by the decoder, and not after.

Fixes ticket #2768.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
ffserver: deprecate Port and BindAddress options in favor of HTTPPort and HTTPBindAddress

The new option names are more explicit.

Signed-off-by: Reynaldo H. Verdejo Pinochet <reynaldo@osg.samsung.com>
ffserver: warn if config uses a system port

Should be harmless as far as users know what they are doing
but an informative warning wont hurt. For details, refer to
http://tools.ietf.org/html/rfc6335

Signed-off-by: Reynaldo H. Verdejo Pinochet <reynaldo@osg.samsung.com>