mpv script to bookmarks scenes in EDL playlists. Press Ctrl+e to mark the start of a scene, then press it a second time to mark the end and append the scene to bookmarks.edl.

generate-edl.lua

local utils = require 'mp.utils'
local start

mp.add_key_binding('Ctrl+e', 'generate-edl', function ()
    if start == nil then
        start = mp.get_property_native('time-pos')
        mp.osd_message('Saved start')
        return
    end

    local directory, filename = utils.split_path(mp.get_property('path'))

    if filename:find(',') then
        filename = '%' .. #filename .. '%' .. filename
    end

    local bookmarks_exist = utils.file_info(directory .. '/bookmarks.edl')
    local edl = io.open(directory .. '/bookmarks.edl', 'a')
    if not bookmarks_exist then
        edl:write('# mpv EDL v0\n')
    end
    edl:write(
        filename .. ',' .. start .. ',' .. mp.get_property_native('time-pos') - start .. '\n'
    )
    edl:close()
    start = nil
    mp.osd_message('EDL updated')
end)