sub: add --ass-style-override=force option

(The old "force" choice of that option is renamed to "force-default".)

This allows overriding native ASS script subtitle styles with the style
provided by the --sub-text-* options (like --sub-text-font etc.). This
is disabled by default, and needs to be explicitly enabled with the
--ass-style-override=force option and input property.

This uses in fact exactly the same options (--sub-text-*) and semantics
as the ones used to configure unstyled text subtitles.

It's recommended to combine this with this in the mpv config file:

ass-force-style="ScaledBorderAndShadow=1"   # work around dumb libass behavior

Also, adding a key binding to toggle this behavior should be added,
because overriding can easily break:

L cycle ass-style-override

This would cycle override behavior on Shift+L and allows quickly
disabling/enabling style overrides.

Note: ASS should be considered a vector format rather than a subtitle
format. There is no easy or reliable way to determine whether the style
of a given subtitle event can be changed without destroying visuals or
not. This patch relies on a simple heuristic, which often works and
often breaks.

0 files changed, 0 insertions, 0 deletions