sd_add: replace --sub-ass=no with --ass-style-override=strip

--sub-ass=no / --ass=no still work, but --ass-style-override=strip is
preferred now. With this change, --ass-style-override can control all
the types of style overriding.

DOCS/interface-changes.rst

@@ -23,6 +23,8 @@ Interface changes
     - now ab-loops are active even if one of the "ab-loop-a"/"-b" properties is
       unset ("no"), in which case the start of the file is used if the A loop
       point is unsert, and the end of the file for an unset B loop point
+    - deprecate --sub-ass=no option by --ass-style-override=strip
+      (also needs --embeddedfonts=no)
  --- mpv 0.17.0 ---
     - deprecate "track-list/N/audio-channels" property (use
       "track-list/N/demux-channel-count" instead)

DOCS/man/options.rst

@@ -1429,7 +1429,7 @@ Subtitles
 
         Using this option may lead to incorrect subtitle rendering.
 
-``--ass-style-override=<yes|no|force>``
+``--ass-style-override=<yes|no|force|signfs|strip>``
     Control whether user style overrides should be applied.
 
     :yes:   Apply all the ``--ass-*`` style override options. Changing the default
@@ -1439,6 +1439,8 @@ Subtitles
     :no:    Render subtitles as forced by subtitle scripts.
     :force: Try to force the font style as defined by the ``--sub-text-*``
             options. Can break rendering easily.
+    :strip: Radically strip all ASS tags and styles from the subtitle. This
+            is equivalent to the old ``--no-ass`` / ``--no-sub-ass`` options.
 
 ``--ass-force-margins``
     Enables placing toptitles and subtitles in black borders when they are
@@ -1535,6 +1537,13 @@ Subtitles
 ``--sub-ass``, ``--no-sub-ass``
     Render ASS subtitles natively (enabled by default).
 
+    .. note::
+
+        This has been deprecated by ``--ass-style-override=strip``. You also
+        may need ``--embeddedfonts=no`` to get the same behavior. Also,
+        using ``--ass-style-override=force`` should give better results
+        without breaking subtitles too much.
+
     If ``--no-sub-ass`` is specified, all tags and style declarations are
     stripped and ignored on display. The subtitle renderer uses the font style
     as specified by the ``--sub-text-`` options instead.
@@ -1545,10 +1554,6 @@ Subtitles
         rendering of ASS/SSA subtitles. It can sometimes be useful to forcibly
         override the styling of ASS subtitles, but should be avoided in general.
 
-    .. note::
-
-        Try using ``--ass-style-override=force`` instead.
-
 ``--sub-auto=<no|exact|fuzzy|all>``, ``--no-sub-auto``
     Load additional subtitle files matching the video filename. The parameter
     specifies how external subtitle files are matched. ``exact`` is enabled by

options/options.c

@@ -374,7 +374,7 @@ const m_option_t mp_opts[] = {
     OPT_CHOICE("ass-shaper", ass_shaper, 0,
                ({"simple", 0}, {"complex", 1})),
     OPT_CHOICE("ass-style-override", ass_style_override, 0,
-               ({"no", 0}, {"yes", 1}, {"force", 3}, {"signfs", 4})),
+               ({"no", 0}, {"yes", 1}, {"force", 3}, {"signfs", 4}, {"strip", 5})),
     OPT_FLAG("sub-scale-by-window", sub_scale_by_window, 0),
     OPT_FLAG("sub-scale-with-window", sub_scale_with_window, 0),
     OPT_FLAG("ass-scale-with-window", ass_scale_with_window, 0),

sub/sd_ass.c

@@ -422,7 +422,8 @@ static void get_bitmaps(struct sd *sd, struct mp_osd_res dim, double pts,
 {
     struct sd_ass_priv *ctx = sd->priv;
     struct MPOpts *opts = sd->opts;
-    bool no_ass = !opts->ass_enabled || ctx->on_top;
+    bool no_ass = !opts->ass_enabled || ctx->on_top ||
+                  opts->ass_style_override == 5;
     bool converted = ctx->is_converted || no_ass;
     ASS_Track *track = no_ass ? ctx->shadow_track : ctx->ass_track;
     ASS_Renderer *renderer = ctx->ass_renderer;