commit 79d4c905c7b4c9acb38eebb42cecba3d7fa676d4
Author: Lukas Kucharczyk <lukas@kucharczyk.xyz>
Date:   Sat Aug 17 16:18:02 2024 +0200

    initial commit

diff --git a/mpv-chapter-title-duration.lua b/mpv-chapter-title-duration.lua
new file mode 100644
index 0000000..1dbd538
--- /dev/null
+++ b/mpv-chapter-title-duration.lua
@@ -0,0 +1,66 @@
+local chapter = { number = 0, title = "", length = 0, available = false }
+
+local function seconds_to_minutes(total_seconds)
+  local minutes = math.floor(total_seconds / 60)
+  local seconds = total_seconds % 60
+  return minutes, seconds
+end
+
+local function showChapterTitle()
+  local message = ""
+  if (chapter.available == true) then
+    local minutes, seconds = seconds_to_minutes(chapter.length)
+    local formatted_time = string.format("%02d:%02d", minutes, seconds)
+    message = string.format("Chapter (%s): %s (%s)", chapter.number, chapter.title, formatted_time)
+  else
+    message = "No chapters available"
+  end
+  mp.osd_message(message)
+end
+
+local function chapter_info_update()
+  local chapterList = mp.get_property_native("chapter-list")
+  if not chapterList or #chapterList == 0 then
+    chapter.available = false
+    return
+  end
+  chapter.available = true
+  local chapterCount = (mp.get_property_number("chapter-list/count") or 0)
+  local currentChapterIndex = (mp.get_property_number("chapter") or 0) + 1
+  chapter.number = currentChapterIndex
+  local currentChapter = chapterList[currentChapterIndex]
+  chapter.title = currentChapter.title or ""
+  local nextChapterIndex = currentChapterIndex + 1
+  if (nextChapterIndex > chapterCount) then
+    local durationFull = mp.get_property_number("duration/full") or 0
+    if durationFull ~= 0 then
+      chapter.length = durationFull - currentChapter.time
+    end
+  else
+    local nextChapter = chapterList[nextChapterIndex]
+    chapter.length = nextChapter.time - currentChapter.time
+  end
+end
+
+local function onChapterChange()
+  chapter_info_update()
+  showChapterTitle()
+end
+
+mp.register_event("file-loaded", chapter_info_update)
+mp.observe_property("chapter", nil, function()
+  onChapterChange()
+end)
+mp.add_key_binding(nil, "show-chapter-title", function()
+  showChapterTitle()
+end)
+-- don't display the native OSD
+-- when changing chapters as it overlaps
+-- with ours but only sometimes
+-- so it creates this janky feeling
+mp.add_key_binding("PGUP", "next-chapter", function()
+  mp.command("no-osd add chapter 1")
+end)
+mp.add_key_binding("PGDWN", "prev-chapter", function()
+  mp.command("no-osd add chapter -1")
+end)