Constant rsmpeg::ffi::AVFrameSideDataType_AV_FRAME_DATA_REGIONS_OF_INTEREST

pub const AVFrameSideDataType_AV_FRAME_DATA_REGIONS_OF_INTEREST: u32 = 20; // 0x0000_0014u32

Regions Of Interest, the data is an array of AVRegionOfInterest type, the number of array element is implied by AVFrameSideData.size / AVRegionOfInterest.self_size.