OBS 日期时间.毫秒时间脚本：

obs           = obslua
source_name   = ""

last_text     = ""
format_string = ""
activated     = false

-- 此函数用于获取精确的毫秒级时间戳，适用于 Linux 系统
local function getMillisTimestamp()
    local sec, usec = os.time(), os.clock()
    local millis = math.floor((sec + usec) * 1000)
    return millis
end

-- Function to set the time text
function set_time_text()
	-- local text = os.date(format_string)

	-- local date_table = os.date("*t")
	-- local ms = string.format("%.3f", os.clock()) 
	-- local hour, minute, second = date_table.hour, date_table.min, date_table.sec
	-- local year, month, day = date_table.year, date_table.month, date_table.day   
	-- local text = string.format("%s", ms)

	local date_table = os.date("*t")
	local hour, minute, second = date_table.hour, date_table.min, date_table.sec
	local year, month, day = date_table.year, date_table.month, date_table.day
	-- 获取毫秒级时间戳
	local millisTimestamp = getMillisTimestamp()
	-- 提取毫秒部分
	local ms = millisTimestamp % 1000
	-- 格式化时间字符串
	local text = string.format("%04d-%02d-%02d %02d:%02d:%02d.%03d", year, month, day, hour, minute, second, ms)


	if text ~= last_text then
		local source = obs.obs_get_source_by_name(source_name)
		if source ~= nil then
			local settings = obs.obs_data_create()
			obs.obs_data_set_string(settings, "text", text)
			obs.obs_source_update(source, settings)
			obs.obs_data_release(settings)
			obs.obs_source_release(source)
		end
	end

	last_text = text
end

function timer_callback()
	set_time_text()
end

function activate(activating)
	if activated == activating then
		return
	end

	activated = activating

	if activating then
		set_time_text()
		obs.timer_add(timer_callback, 1)
	else
		obs.timer_remove(timer_callback)
	end
end

-- Called when a source is activated/deactivated
function activate_signal(cd, activating)
	local source = obs.calldata_source(cd, "source")
	if source ~= nil then
		local name = obs.obs_source_get_name(source)
		if (name == source_name) then
			activate(activating)
		end
	end
end

function source_activated(cd)
	activate_signal(cd, true)
end

function source_deactivated(cd)
	activate_signal(cd, false)
end

function reset(pressed)
	if not pressed then
		return
	end

	activate(false)
	local source = obs.obs_get_source_by_name(source_name)
	if source ~= nil then
		local active = obs.obs_source_active(source)
		obs.obs_source_release(source)
		activate(active)
	end
end

----------------------------------------------------------

-- A function named script_properties defines the properties that the user
-- can change for the entire script module itself
function script_properties()
	local props = obs.obs_properties_create()

	local p = obs.obs_properties_add_list(props, "source", "Text Source", obs.OBS_COMBO_TYPE_EDITABLE, obs.OBS_COMBO_FORMAT_STRING)
	local sources = obs.obs_enum_sources()
	if sources ~= nil then
		for _, source in ipairs(sources) do
			source_id = obs.obs_source_get_id(source)
			if source_id == "text_gdiplus" or source_id == "text_ft2_source" then
				local name = obs.obs_source_get_name(source)
				obs.obs_property_list_add_string(p, name, name)
			end
		end
	end
	obs.source_list_release(sources)

	obs.obs_properties_add_text(props, "format_string", "Format String", obs.OBS_TEXT_DEFAULT)

	return props
end

-- A function named script_description returns the description shown to
-- the user
function script_description()
	return "Sets a text source to act as a date/time text when the source is active.\n\nMade by Ragowit"
end

-- A function named script_update will be called when settings are changed
function script_update(settings)
	activate(false)

	source_name = obs.obs_data_get_string(settings, "source")
	format_string = obs.obs_data_get_string(settings, "format_string")
	
	reset(true)
end

-- A function named script_defaults will be called to set the default settings
function script_defaults(settings)
	obs.obs_data_set_default_string(settings, "format_string", "%Y-%m-%d %X")
end

-- a function named script_load will be called on startup
function script_load(settings)
	-- Connect activation/deactivation signal callbacks
	--
	-- NOTE: These particular script callbacks do not necessarily have to
	-- be disconnected, as callbacks will automatically destroy themselves
	-- if the script is unloaded.  So there's no real need to manually
	-- disconnect callbacks that are intended to last until the script is
	-- unloaded.
	local sh = obs.obs_get_signal_handler()
	obs.signal_handler_connect(sh, "source_activate", source_activated)
	obs.signal_handler_connect(sh, "source_deactivate", source_deactivated)
end

效果

********************************* 只要思想不滑坡，办法总比困难多*********************************