H.264 SEI recovery points are put at frames in the stream that are not
(necessarily) keyframes, but that mark “if you decode the next N frames, you
will have a [perfectly or approximately] valid picture no matter what your
starting point was”. In particular, this is needed to decode streams encoded
with Periodic Intra Refresh (e.g. --sout-x264-intra-refresh true), at least if
you don't see the beginning of the stream, e.g. tuning into a multicast stream.
This may also help with some kinds of streams from AVCHD cameras that use
similar techniques.

One could argue that this functionality should live inside libavcodec instead,
but given that VLC does its own H.264 depacketization, this seems to be the
best place. I've tested it with streaming over UDP, and it seems to work fine.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

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

This reverts commit e20a107d.

The format comments are out of sync with what the code actually
assumes. I updated the comments, and filled in some missing information from
http://www.mpucoder.com/DVD/ass-hdr.html .
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Require live555 version >= 2010.05.29

Too many quotes.

buttons in the managed layout.

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

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

Switching to the non monotonic clock was still unsafe.
This fixes some sync issues on the iPad.

Switch to double, do the operations and then convert back.
This fixes the iPad video freezes.