#======== Shutter Interval Info SEI message =====================SEIShutterIntervalEnabled : 1SEISiiTimeScale : 24000000SEISiiInputNumUnitsInShutterInterval : 200000 # fixed shutter interval: only one entry, the value is assigned to sii_num_units_in_shutter_interval. # here is one example with frame rate=120fps, encoder derives the actually value based on frame rate.