'YCbCr4:2:0 (2 2)' , '\'2 4\'' => 'YCbCr4:2:1 (2 4)' , '\'4 1\'' => 'YCbCr4:1:1 (4 1)' , '\'4 2\'' => 'YCbCr4:1:0 (4 2)' ); } }