Some video codecs are not meant to output frames on their own but to be applied
on top of frames generated by other codecs, as is the case of LCEVC, Dolby Vision,
etc. Add a codec prop to signal this kind of codec, so that library users may know
to not expect a standalone decoder for them to be present.
Signed-off-by: James Almer <jamrial@gmail.com>
These defines are also used in other contexts than just AVCodecContext
ones, e.g. in libavformat. Furthermore, given that these defines are
public, the AV-prefix is the right one, so deprecate (and not just move)
the FF-macros.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
