patch OSC

[code]
diff --git a/player/lua/osc.lua b/player/lua/osc.lua
index a6cdcbe..7b128fa 100644
--- a/player/lua/osc.lua
+++ b/player/lua/osc.lua
@@ -637,7 +637,20 @@ function render_elements(master_ass)
                     elem_ass:append(string.format("{\\1a&H%X&\\2a&H%X&\\3a&H%X&\\4a&H%X&}",
                         ar[1], ar[2], ar[3], ar[4]))

-                    elem_ass:append(tooltiplabel)
+                    local chapters = mp.get_property_native("chapter-list", {})
+
+                    if (#chapters > 0) then
+                        local current_chapter = chapters[#chapters].title
+                        for n = 1, #chapters do
+                            if (mp.format_time(chapters[n].time) > tooltiplabel) then
+                                current_chapter = chapters[n-1].title
+                                break
+                            end
+                        end
+                        elem_ass:append(tooltiplabel .. " - " .. current_chapter)
+                            else
+                                    elem_ass:append(tooltiplabel)
+                    end

                 end
             end
[/code]