if (sps->vui.frame_field_info_present_flag) {
int pic_struct = get_bits(gb, 4);
h->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
if (sps->vui.frame_field_info_present_flag) {
int pic_struct = get_bits(gb, 4);
h->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;