Add -movflags use_metadata_tags to the mov muxer. This will cause
the muxer to write all metadata to the file in the keys and mtda
atoms.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

* commit '3399a26d':
  nvenc: allow setting the number of slices
  nvenc: De-compensate aspect ratio compensation of DVD-like content.
  nvenc: list the major contributors in the copyright header
  configure: Don't require nonfree for nvenc
  nvenc: drop the hard dependency on CUDA
  nvenc: only support HW frames when CUDA is enabled
  nvenc: write the VUI signal properties for HEVC
  nvenc: only write the VUI signal type fields if they are set
  nvenc: Generate bufferingPeriod/pictureTiming SEI
  nvenc: Delay frame output to increase encoding speed
  nvenc: add support for lossless encoding
  nvenc: Generate AUD NAL units for better compatiblity
  nvenc: fix the rc option definitions

All these commits are noop as requested by Timo Rothenpieler.

<BtbN> andrey_turkin, ubitux, yeah, I like the current state of nvenc in
ffmpeg, I think most remaining differences should be merged on the libav
side of things. At least I'm not aware of anything that's missing in
ffmpeg.
Merged-by: Clément Bœsch <u@pkh.me>

* commit '65dc7ca4':
  Add release notes for 12.

This commit is a noop, but we absolutely need someone to write the
release notes.
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'd68fb147':
  mjpegdec: Properly fail on malloc failure
Merged-by: Clément Bœsch <u@pkh.me>

* commit '85ce9636':
  configure: move the hardware accel libs' entries in the configure output
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'c0f4c7db':
  configure: move the hardware accel libs' entries in the help text
Merged-by: Clément Bœsch <u@pkh.me>

* commit '5e220344':
  configure: improve the help text for external libraries

Only merged the explanation paragraphs. The removal of "enable/disable"
and "[no]" would create too much inconsistency and might cause
confusion.
Merged-by: Clément Bœsch <u@pkh.me>

* commit '0d95d88f':
  lavc: revert the Makefile part of 330177b5Merged-by: Clément Bœsch <u@pkh.me>

Fixes #4124: Invalid argument '-std=c99' not allowed with 'C++/ObjC++'
C++ files fail to compile. This adds '-std=c++11' to CXX_FLAGS to fix.
Signed-off-by: Rick Kern <kernrj@gmail.com>

This commit fixes a broken build when compiling libavcodec with LLVM
compiler. These assembly files use non-standard format that is only
supported by GCC compiler. It would be nice to use a common standard
format. With this patch, both GCC and LLVM can build and generate the
same objects.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes assertion failures in movenc
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes memleak
Fixes Ticket5169
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

* commit 'ded4a654':
  xtea-test: Use struct allocation functions from the API
Merged-by: Clément Bœsch <clement@stupeflix.com>

* commit '8131bd4c':
  blowfish-test: Use struct allocation functions from the API
Merged-by: Clément Bœsch <clement@stupeflix.com>

* commit 'a86ef804':
  blowfish-test: Return different values for different errors
Merged-by: Clément Bœsch <clement@stupeflix.com>

* commit 'b84f3a40':
  movenc: Write 'loci' geotag metadata for 3gp and mp4
Merged-by: Clément Bœsch <clement@stupeflix.com>

* commit 'f12a705e':
  movenc: Factorize a function for finding a metadata entry and the associated language
Merged-by: Clément Bœsch <clement@stupeflix.com>

* commit 'daec1651':
  movenc: Write ?xyz geotag metadata for mov files

This commit is a noop, see a3ec1d6aMerged-by: Clément Bœsch <clement@stupeflix.com>

* commit 'bc431319':
  mov: Also export loci altitude

This commit is a noop, see 08b7d19dMerged-by: Clément Bœsch <clement@stupeflix.com>

* commit '94d8141c':
  mov: Append place name instead of overwriting for loci

This commit is a noop, see 1607f774Merged-by: Clément Bœsch <clement@stupeflix.com>

* commit 'f126365c':
  mov: Fix parsing short loci

This commit is a noop, see 50393bceMerged-by: Clément Bœsch <clement@stupeflix.com>

* commit '704d2bd1':
  mov: Print reason of loci parsing failure

See 9e4f0cfcMerged-by: Clément Bœsch <clement@stupeflix.com>

* commit 'd34826c3':
  mov: Add a comment referring to the standard that defines the loci box
Merged-by: Clément Bœsch <clement@stupeflix.com>

Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>

Fixes Ticket5343
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

* commit '72d62106':
  movenc: Add a missed const
Merged-by: Matthieu Bouron <matthieu.bouron@stupeflix.com>

* commit 'a79aafd0':
  movenc: Add a test for VFR with b-frames, with a duration change at a fragment end
Merged-by: Matthieu Bouron <matthieu.bouron@stupeflix.com>

* commit 'e1eb0fc9':
  movenc: Use packets in interleaving queues for the duration at the end of fragments
Merged-by: Matthieu Bouron <matthieu.bouron@stupeflix.com>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This is definitely not complete.

Anton, Diego and Luca are still maintaining their code in Libav, but are
unwilling to do so in FFmpeg, so removing these entries will prevent
them from getting poked by our users.

Måns, Justin, Kostya and Jason left both projects a while ago.

* commit 'fd4957d9':
  movenc-test: Test write_data_type
Merged-by: Matthieu Bouron <matthieu.bouron@stupeflix.com>