lavfi/subtitles: add force_style option

Signed-off-by: Eejya Singh <singh.eejya@gmail.com>
Signed-off-by: Clément Bœsch <u@pkh.me>

1 files changed, 10 insertions, 0 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index c6fef0c16c..a90825aa98 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8554,6 +8554,10 @@ useful if not UTF-8.
 
 @item stream_index, si
 Set subtitles stream index. @code{subtitles} filter only.
+
+@item force_style
+Override default style or script info parameters of the subtitles. It accepts a
+string containing ASS style format @code{KEY=VALUE} couples separated by ",".
 @end table
 
 If the first key is not specified, it is assumed that the first value
@@ -8580,6 +8584,12 @@ To render the second subtitles stream from that file, use:
 subtitles=video.mkv:si=1
 @end example
 
+To make the subtitles stream from @file{sub.srt} appear in transparent green
+@code{DejaVu Serif}, use:
+@example
+subtitles=sub.srt:force_style='FontName=DejaVu Serif,PrimaryColour=&HAA00FF00'
+@end example
+
 @section super2xsai
 
 Scale the input by 2x and smooth using the Super2xSaI (Scale and