ifies the value of nFrames used to compute clockTimestamp. n frames shall be less than MaxFPS = Ceil( time_scale * hum_units_in_tick)] (D-2) NOTE 8 - n frames is a frame-based counter. For field-specific timing indications, time_offset should be used to indicate a distinct clockTimestamp for each field. When counting type is equal to 2 and cnt_dropped flag is equal to 1, n frames shall be equal to 1 and the value of n frames for the previous picture in output order shall not be equal to 0 unless discontinuity_flag is equal to 1. NOTE 9 - When counting type is equal to 2, the need for increasingly large magnitudes of tOffset in Equation D-1 when using fixed non-integer frame rates (e.g., 12.5 frames per second with time scale equal to 50 and num units in tick equal to 2 and nuit_field_based_flag equal to 0) can be avoided by occasionally skipping over the value n frames equal to 0 when counting (e.g., counting n frames from 0 to 12, then incrementing seconds value and counting n frames from 1 to 12, then incrementing seconds_value and counting n frames from 0 to 12, etc.). When counting type is equal to 3 and cnt_dropped_flag is equal to 1, n frames shall be equal to 0 and the value of n frames for the previous picture in output order shall not be equal to MaxFPS - 1 unless discontinuity_flag is equal to 1. NOTE 10 - When counting type is equal to 3, the need for increasingly large magnitudes of tOffset in Equation D-1 when using fixed non-integer frame rates (e.g., 12.5 frames per second with time scale equal to 50 and num_units_in_tick equal to 2 and nuit_field_based_flag equal to 0) can be avoided by occasionally skipping over the value n frames equal to MaxFPS - 1 when counting (e.g., counting n frames from 0 to 12, then incrementing seconds_value and counting n frames from 0 to 11, then incrementing seconds_value and counting n frames from 0 to 12, etc.). When counting type is equal to 4 and cnt dropped is equal to 1, n frames shall be equal to 2 and the specified value of sS shall be zero and the specified v