ffmpeg-4-4.0.1-bp150.18.1

- Avoid double-nesting BUILD_ORIG with %withs.
  (Reintroduces with_opencore)

- Reduce the optional conditional for the SLE12 backports to
  cover everything, most of the packages in old codestreams were
  not really ready as they need additional baselibs/etc.
  * Since these are new features user will simply wait or use TW

- Enable "kmsgrab" input device

- Redo the nvidia condition based on review feeback

- Do not condition nvidia based on BUILD_ORIG all the support is in
  TW only and not on different instances as such safeguard it with
  version check only bsc#1102532

- Add new bconds to build on SLE12 backports project without
  requiring extra packages:
  * %bcond_without codec2
  * %bcond_without bs2b
  * %bcond_without lv2
  * %bcond_without rubberband
  * %bcond_without soxr
  * %bcond_without zmq

- Fix typo in swresample name

- Conditionalize full build to be primary only on Leap15+

- Add macros to allow conflicting with all other devel projects
  to ensure we always install only one specific ffmpeg

- Conditionalize the vidstab build to not pull it on old releases
- Conditionalize srt support to not pull it on older releases
  - ------------------------------------------------------------------

- Enable ffnvcodec when building with NVIDIA support

- Add pkgconfig(srt) BuildRequires and pass --enable-libsrt to
  configure, enable srt support.
- Refresh patches with quilt:
  * cve-2017-17555.diff
  * ffmpeg-codec-choice.diff
  * ffmpeg-libcdio_cdda-pkgconfig.patch
  * ffmpeg-new-coder-errors.diff

- Enable libxml2 (used by MPEG DASH demuxer)

- Update to new upstream release 4.0.1
  * Fixed some integer overflows, undefined shifts, negative
    shifts, division by 0, and a null pointer deref.

- Enable pkgconfig(vidstab) BuildRequires unconditionally, now
  available in openSUSE.

- Conditionalize openmpt build to be resolvable on Leap 42.3

- Conditionalize mysofa build to be resolvable on Leap 15

- Conditionalize zimg to build on Leap 42.3

- Use autopatch

- Provide ffmpeg symbol without version on main package too

- Prefix all the devel packages and conflict between releases
  * Provide always the %version-%release of the respective build

- Fix setup call to enter to proper folder

- Conflict with other ffmpeg-devel packages, simply always pull
  one of them

- Move license markings to the libs itself
- Add condition to switch between full build and lib only one
- Add provides/obsoletes on the ffmpeg private headers

- Reintroduce conditional libxvid support since FFmpeg?s
  MPEG4-ASP encoder is not quite up to par

- bsc#1103064 attempt to allow migration from the unprefixed devel
  packages cleanly