Function heif_context_get_sequence_timescale 

pub unsafe extern "C" fn heif_context_get_sequence_timescale(
    arg1: *const heif_context,
) -> u32

Get the timescale (clock ticks per second) for timing values in the sequence.

@note Each track may have its independent timescale.

@return Clock ticks per second. Returns 0 if there is no sequence in the file.