cutvid.lua

local status_ok, mp = pcall(require, "mp")
if not status_ok then
	return
end

-- timestamps file
local tmp_file_path = "/tmp/mpv.timestamps"
-- temporary directory (generated by ffmpeg-cut-merge script)
local tmp_ffmpeg_dir = "/tmp/ffmpeg_cut_merge"

-- remove previous parasite files
local function cleanup()
  os.remove(tmp_file_path)
  os.execute("rm -rf " .. tmp_ffmpeg_dir)
end

local start_stamp = nil

local function file_exists()
	local f = io.open(tmp_file_path, "r")
	if f ~= nil then
		io.close(f)
		return true
	else
		return false
	end
end

local function format_time()
  local time_pos = mp.get_property_number("time-pos")
  local time_seg = time_pos % 60
  time_pos = time_pos - time_seg
  local time_hours = math.floor(time_pos / 3600)
  time_pos = time_pos - (time_hours * 3600)
  local time_minutes = time_pos / 60
  local time_sec,time_ms = string.format("%.03f", time_seg):match("([^.]*).(.*)")
  return string.format("%02d:%02d:%02d.%s", time_hours, time_minutes, time_sec, time_ms)
end

local function get_stamps()
	if start_stamp then
		local end_stamp = format_time()
		mp.osd_message("Section ended " .. end_stamp)
		-- write start timestamp and encoding duration to tmp file to be processed
		-- by ffmpeg
		local tmpfile = io.open(tmp_file_path, "a+")
		io.output(tmpfile)
		io.write(string.format("%s-%s\n", start_stamp, end_stamp))
		io.close(tmpfile)
		start_stamp = nil
	else
		start_stamp = format_time()
		mp.osd_message("Section started " .. start_stamp)
	end
end

local function clean_stamps()
  start_stamp = nil
  mp.osd_message("Stamp cleaned")
end

local function cutvid()
	if start_stamp ~= nil then
		mp.osd_message("Missing end section timestamp!")
		return
	elseif not file_exists() then
		mp.osd_message("No section timestamps found!")
		return
	end
	local video_path = string.format("%s/%s", mp.get_property("working-directory"), mp.get_property("path"))
	-- if file exists then at least one section has been written to it
	os.execute(string.format("/usr/local/bin/ffmpeg-cut-merge %s %s", tmp_file_path, video_path))
	mp.osd_message("Video generated")
end

cleanup()
-- add mappings
mp.add_key_binding("Ctrl+t", "get_stamps", get_stamps)
mp.add_key_binding("Ctrl+Shift+t", "clean_stamps", clean_stamps)
mp.add_key_binding("Ctrl+p", "cutvid", cutvid)