Script de aegisub (http://www.aegisub.org/) que limpia el error que inserta strings ABC en los subtitulos .ass al demultiplexar desde Matroska (.mkv) archivos viejos.

clean_abc_error.lua

local tr = aegisub.gettext

script_name = tr"Clean ABC Error"
script_description = tr"Clean ABC error created when demux .mkv files."
script_author = "Aitor González"
script_version = "0.1"
script_modified = "18/11/2012"

function clean_abc(subtitles)
	startvar = 1
	endvar = false
	list_l = {}
	
	while endvar ~= true do
		for i = startvar, #subtitles do
			aegisub.progress.set(i * 100 / #subtitles)
			
			if subtitles[i].class == "dialogue" and not subtitles[i].comment and subtitles[i].text == "ABC" then
				table.insert(list_l, i)
			end
			
			if i == #subtitles then
				endvar = true
			end
			
			if table.getn(list_l) == 200 then
				startvar = i - 200
				break
			end
		end
		
		subtitles.delete(unpack(list_l))
		list_l = {}
	end
end

function clean_abc_macro(subtitles, selected_lines, active_line)
	clean_abc(subtitles)
	aegisub.set_undo_point(script_name)
end

function clean_abc_filter(subtitles, config)
	clean_abc(subtitles)
end

aegisub.register_macro(script_name, script_description, clean_abc_macro)
aegisub.register_filter(script_name, script_description, 0, clean_abc_filter)