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osd: customizable subtitle and OSD position 

You can set in which "corner" the OSD and subtitles are shown. I'd
prefer it a bit more general (so you could set the alignment using
a factor), but the libass API does not provide this.
This commit is contained in:
wm4 2015-02-16 20:04:02 +01:00
parent 4c283d5f8d
commit 14a24f35bf
4 changed files with 22 additions and 0 deletions
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11
DOCS/man/options.rst
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@ -2540,6 +2540,17 @@ OSD
Default: 22.
``--osd-align-x=<left|center|right>``, ``--sub-text-align-x=...``
Control to which corner of the screen OSD or text subtitles should be
aligned to (default: ``center`` for subs, ``left`` for OSD).
Never applied to ASS subtitles, except in ``--no-sub-ass`` mode. Likewise,
this does not apply to image subtitles.
``--osd-align-y=<top|center|bottom>`` ``--sub-text-align-y=...``
Vertical position (default: ``bottom`` for subs, ``top`` for OSD).
Details see ``--osd-align-x``.
``--osd-scale=<factor>``
OSD font size multiplier, multiplied with ``--osd-font-size`` value.

1
sub/ass_mp.c
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@ -83,6 +83,7 @@ void mp_ass_set_style(ASS_Style *style, double res_y,
style->MarginV = opts->margin_y * scale;
style->ScaleX = 1.;
style->ScaleY = 1.;
style->Alignment = 1 + (opts->align_x + 1) + (opts->align_y + 2) % 3 * 4;
#if LIBASS_VERSION >= 0x01020000
style->Blur = opts->blur;
#endif

8
sub/osd.c
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@ -54,6 +54,10 @@ static const m_option_t style_opts[] = {
OPT_FLOATRANGE("spacing", spacing, 0, -10, 10),
OPT_INTRANGE("margin-x", margin_x, 0, 0, 300),
OPT_INTRANGE("margin-y", margin_y, 0, 0, 600),
OPT_CHOICE("align-x", align_x, 0,
({"left", -1}, {"center", 0}, {"right", +1})),
OPT_CHOICE("align-y", align_y, 0,
({"top", -1}, {"center", 0}, {"bottom", +1})),
OPT_FLOATRANGE("blur", blur, 0, 0, 20),
{0}
};
@ -71,6 +75,8 @@ const struct m_sub_options osd_style_conf = {
.shadow_offset = 0,
.margin_x = 25,
.margin_y = 22,
.align_x = -1,
.align_y = -1,
},
};
@ -87,6 +93,8 @@ const struct m_sub_options sub_style_conf = {
.shadow_offset = 0,
.margin_x = 25,
.margin_y = 22,
.align_x = 0,
.align_y = 1,
},
};

2
sub/osd.h
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@ -133,6 +133,8 @@ struct osd_style_opts {
float spacing;
int margin_x;
int margin_y;
int align_x;
int align_y;
float blur;
};