Hi,
I've implemented a force_style option in the subtitles filter. Kindly find
the patch attached.
--
Eejya Singh,
3rd year undergraduate,
Computer Science,
BITS Pilani Goa Campus
From 88014fde69b249d3b1cb8e6bd2f654156ba2b4e7 Mon Sep 17 00:00:00 2001
From: Eejya Singh <singh.ee...@gmail.com>
Date: Wed, 28 Jan 2015 17:41:42 +0530
Subject: [PATCH] Adding Force Style option in Subtitles Filter
Signed-off-by: Eejya Singh <singh.ee...@gmail.com>
---
doc/filters.texi | 14 ++++++++++++++
libavfilter/version.h | 2 +-
libavfilter/vf_subtitles.c | 24 ++++++++++++++++++++++++
3 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/doc/filters.texi b/doc/filters.texi
index 261fd24..60ef7f4 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8470,6 +8470,10 @@ useful if not UTF-8.
@item stream_index, si
Set subtitles stream index. @code{subtitles} filter only.
+
+@item force_style
+Set desired style for the customization of subtitles.It follows ASS style format.
+
@end table
If the first key is not specified, it is assumed that the first value
@@ -8496,6 +8500,16 @@ To render the second subtitles stream from that file, use:
subtitles=video.mkv:si=1
@end example
+To change the font of subtitles stream from file, use:
+@example
+subtitles=sub.srt:force_style=FontName=Arial
+@end example
+
+To change the color and formatting of subtitles stream from file, use:
+@example
+subtitles='sub.srt:force_style=FontName=Arial,PrimaryColour=255'
+@end example
+
@section super2xsai
Scale the input by 2x and smooth using the Super2xSaI (Scale and
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 50967f4..7ec374d 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -31,7 +31,7 @@
#define LIBAVFILTER_VERSION_MAJOR 5
#define LIBAVFILTER_VERSION_MINOR 6
-#define LIBAVFILTER_VERSION_MICRO 100
+#define LIBAVFILTER_VERSION_MICRO 101
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \
diff --git a/libavfilter/vf_subtitles.c b/libavfilter/vf_subtitles.c
index be4c6a5..0fae118 100644
--- a/libavfilter/vf_subtitles.c
+++ b/libavfilter/vf_subtitles.c
@@ -51,6 +51,7 @@ typedef struct {
ASS_Track *track;
char *filename;
char *charenc;
+ char *force_style;
int stream_index;
uint8_t rgba_map[4];
int pix_step[4]; ///< steps per pixel for each plane of the main output
@@ -260,6 +261,7 @@ static const AVOption subtitles_options[] = {
{"charenc", "set input character encoding", OFFSET(charenc), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS},
{"stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS},
{"si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS},
+ {"force_style", "force subtitle style", OFFSET(force_style), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS},
{NULL},
};
@@ -389,6 +391,28 @@ static av_cold int init_subtitles(AVFilterContext *ctx)
if (ass->charenc)
av_dict_set(&codec_opts, "sub_charenc", ass->charenc, 0);
ret = avcodec_open2(dec_ctx, dec, &codec_opts);
+
+ if (ass->force_style) {
+ char **list = NULL;
+ char *temp = NULL;
+ char *ptr = av_strtok(ass->force_style, ",", &temp);
+ int i = 0;
+ while (ptr) {
+ av_dynarray_add(&list, &i, ptr);
+ if (!list) {
+ ret = AVERROR(ENOMEM);
+ goto end;
+ }
+ ptr = av_strtok(NULL, ",", &temp);
+ }
+ av_dynarray_add(&list, &i, NULL);
+ if (!list) {
+ ret = AVERROR(ENOMEM);
+ goto end;
+ }
+ ass_set_style_overrides(ass->library, list);
+ av_free(list);
+ }
if (ret < 0)
goto end;
--
1.9.1
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