pub const AV_FRAME_DATA_FILM_GRAIN_PARAMS: u32 = 21; // 21u32Expand description
Film grain parameters for a frame, described by AVFilmGrainParams. Must be present for every frame which should have film grain applied.
May be present multiple times, for example when there are multiple alternative parameter sets for different video signal characteristics. The user should select the most appropriate set for the application.