alue of mM shall not be an integer multiple of ten and frames for the previous picture in output order shall not be equal to 0 or 1 unless discontinuity_flag is equal to 1. Rec. ITU-T H.264 (01/2012) NOTE 11 - When counting type is equal to 4, the need for increasingly large magnitudes of tOffset in Equation D-1 when using fixed non-integer frame rates (e.g., 30000-1001 frames per second with time scale equal to 60000 and num_units_in_tick equal to 1 001 and nuit_field_based_flag equal to 1) can be reduced by occasionally skipping over the values of n frames equal to 0 and 1 when counting (e.g., counting n frames from 0 to 29, then incrementing and from 0 to 29, etc., until the seconds_value is zero and minutes_value is not an integer multiple of ten, then counting n frames from 2 to 29, then incrementing seconds value and counting n frames from 0 to 29, etc.). This counting method is well known in industry and is often referred to as "NTSC drop-frame" counting. When counting_ is equal to 5 or 6 and cnt_dropped_flag is equal to 1, n frames shall not be equal to 1 plus the value of n frames for the previous picture in output order modulo MaxFPS unless discontinuity_flag is equal to 1. NOTE 12 - When counting_type is equal to 5 or 6, the need for increasingly large magnitudes of tOffset in Equation D-1 when using fixed non-integer frame rates can be avoided by occasionally skipping over some values of n frames when counting. The specific values of in_frames that are skipped are not specified when counting_type is equal to 5 or 6. seconds_flag equal to 1 specifies that seconds_value and minutes_flag are present when full_timestamp_flag is equal to 0. seconds_flag equal to 0 specifies that seconds_value and minutes_flag are not present. seconds_value specifies the value of sS used to compute clockTimestamp. The value of seconds_value shall be in the range of 0 to 59, inclusive. When seconds_value is not present, the previous seconds_value in decoding order shall be used as sS to compute clockTimestamp. minutes_flag e