generating a list of motion vector predictor candidates including a candidate for subblock collocated temporal prediction when available and a candidate for subblock Affine prediction when available, wherein a value of the motion vector predictor index for the candidate for subblock Affine prediction changes according to the availability of another candidate whose position in the list is previous to the candidate for subblock Affine prediction;

selecting one of the motion vector predictor candidates in the list; and

encoding a motion vector predictor index for the selected motion vector predictor candidate using CABAC coding, a first bit of the motion vector predictor index being CABAC coded and all bits, except for the first bit, of the motion vector predictor index being bypass CABAC coded, wherein the motion vector predictor candidates are Merge candidates and the motion vector predictor index is a Merge index.