Useful to strip dolbyvision from the output, in cases where the user
does not want it applied. Doing this as a video filter gives users the
abiilty to easily toggle this stripping at runtime in a way that
properly propagates to any (potentially stateful) VO.
It also thematically fits the rest of the options in vf_format, which
are similarly concerned with modifying the video image parameters.
Niklas Haas
05ccc51d53