Allocate a complete AVFilmGrainParams and add it to the frame.
@param frame The frame which side data is added to.
@return The AVFilmGrainParams structure to be filled by caller.
See Implementation
Allocate a complete AVFilmGrainParams and add it to the frame.
@param frame The frame which side data is added to.
@return The AVFilmGrainParams structure to be filled by caller.