Constant rsmpeg::ffi::AVChromaLocation_AVCHROMA_LOC_TOPLEFT

pub const AVChromaLocation_AVCHROMA_LOC_TOPLEFT: u32 = 3; // 0x0000_0003u32

< ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2