Constant rsmpeg::ffi::AVColorPrimaries_AVCOL_PRI_BT709

pub const AVColorPrimaries_AVCOL_PRI_BT709: u32 = 1; // 0x0000_0001u32

< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B