options: rename --media-title option

Conflicts with the property.

DOCS/interface-changes.rst

@@ -20,6 +20,7 @@ Interface changes
 ::
 
  --- mpv 0.10.0 will be released ---
+    - deprecate --media-title, replaced with --force-media-title
     - deprecate "length" property, replaced with "duration"
     - change volume property:
         - the value 100 is now always "unchanged volume" - with softvol, the

options/options.c

@@ -402,7 +402,7 @@ const m_option_t mp_opts[] = {
     // vo name (X classname) and window title strings
     OPT_STRING("x11-name", vo.winname, 0),
     OPT_STRING("title", wintitle, 0),
-    OPT_STRING("media-title", media_title, 0),
+    OPT_STRING("force-media-title", media_title, 0),
     // set aspect ratio of monitor - useful for 16:9 TV-out
     OPT_FLOATRANGE("monitoraspect", vo.force_monitor_aspect, 0, 0.0, 9.0),
     OPT_FLOATRANGE("monitorpixelaspect", vo.monitor_pixel_aspect, 0, 0.2, 9.0),
@@ -632,6 +632,7 @@ const m_option_t mp_opts[] = {
     OPT_REPLACED("mkv-subtitle-preroll", "demuxer-mkv-subtitle-preroll"),
     OPT_REPLACED("dtshd", "ad-spdif-dtshd"),
     OPT_REPLACED("ass-use-margins", "sub-use-margins"),
+    OPT_REPLACED("media-title", "force-media-title"),
 
     {0}
 };

player/lua/ytdl_hook.lua

@@ -176,7 +176,7 @@ mp.add_hook("on_load", 10, function ()
 
                 mp.set_property("stream-open-filename", playlist)
                 if not (json.title == nil) then
-                    mp.set_property("file-local-options/media-title", json.title)
+                    mp.set_property("file-local-options/force-media-title", json.title)
                 end
 
             else