Fixes #6605.
Signed-off-by: Paul B Mahol <[email protected]>
---
libavfilter/vf_subtitles.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavfilter/vf_subtitles.c b/libavfilter/vf_subtitles.c
index 805ee2d..b7ba628 100644
--- a/libavfilter/vf_subtitles.c
+++ b/libavfilter/vf_subtitles.c
@@ -54,6 +54,7 @@ typedef struct AssContext {
char *charenc;
char *force_style;
int stream_index;
+ int alpha;
uint8_t rgba_map[4];
int pix_step[4]; ///< steps per pixel for each plane of the main
output
int original_w, original_h;
@@ -69,6 +70,7 @@ typedef struct AssContext {
{"f", "set the filename of file to read",
OFFSET(filename), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN,
CHAR_MAX, FLAGS }, \
{"original_size", "set the size of the original video (used to scale
fonts)", OFFSET(original_w), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, CHAR_MIN,
CHAR_MAX, FLAGS }, \
{"fontsdir", "set the directory containing the fonts to read",
OFFSET(fontsdir), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN,
CHAR_MAX, FLAGS }, \
+ {"alpha", "enable processing of alpha channel",
OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0,
1, FLAGS }, \
/* libass supports a log level ranging from 0 to 7 */
static const int ass_libavfilter_log_level_map[] = {
@@ -140,7 +142,7 @@ static int config_input(AVFilterLink *inlink)
{
AssContext *ass = inlink->dst->priv;
- ff_draw_init(&ass->draw, inlink->format, 0);
+ ff_draw_init(&ass->draw, inlink->format, ass->alpha);
ass_set_frame_size (ass->renderer, inlink->w, inlink->h);
if (ass->original_w && ass->original_h)
--
2.9.3
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