sub: mess with styling defaults, change --ass-use-margins behavior

Now --ass-use-margins doesn't apply to normal subtitles anymore. This is
probably the inverse from the mpv behavior users expected so far, and
thus a breaking change, so rename the option, that the user at least has
a chance to lookup the option and decide whether the new behavior is
wanted or not.

The basic idea here is:
- plain text subtitles should have a certain useful defalt behavior,
  like actually using margins
- ASS subtitles should never be broken by default
- ASS subtitles should look and behave like plaintext subtitles if
  the --ass-style-override=force option is used

This also subtly changes --sub-scale-with-window and adds the --ass-
scale-with-window option. Since this one isn't so important, don't
bother with compatibility.

1 files changed, 2 insertions, 1 deletions

diff --git a/player/command.c b/player/command.c
index 9378f53df0..43da75e156 100644
--- a/player/command.c
+++ b/player/command.c
@@ -3448,7 +3448,8 @@ static const struct m_property mp_properties[] = {
     {"sub-visibility", property_osd_helper},
     {"sub-forced-only", property_osd_helper},
     {"sub-scale", property_osd_helper},
-    {"ass-use-margins", property_osd_helper},
+    {"sub-use-margins", property_osd_helper},
+    {"ass-force-margins", property_osd_helper},
     {"ass-vsfilter-aspect-compat", property_osd_helper},
     {"ass-style-override", property_osd_helper},