Function realsense_sys::rs2_playback_get_duration

pub unsafe extern "C" fn rs2_playback_get_duration(
    device: *const rs2_device, 
    error: *mut *mut rs2_error
) -> c_ulonglong

Gets the total duration of the file in units of nanoseconds \param[in] device A playback device \param[out] error If non-null, receives any error that occurs during this call, otherwise, errors are ignored \return Total duration of the file in units of nanoseconds