[FFmpeg-devel] [PATCH v3 1/8] avcodec/movtextenc: Fix potential use of uninitialized value

Andreas Rheinhardt andreas.rheinhardt at gmail.com
Sat Oct 17 10:37:38 EEST 2020

Background colour was never initialized if no style was available.
Use a sane default of zero (i.e. completely transparent).

Fixes Coverity issue #1461471.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
No change for this patch since last time; I am just resending all because
I have added a few patches that I intend to backport and that therefore
should be applied before "Simplify writing to AVBPrint".

 libavcodec/movtextenc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/movtextenc.c b/libavcodec/movtextenc.c
index 5f60b8db61..11db240ab7 100644
--- a/libavcodec/movtextenc.c
+++ b/libavcodec/movtextenc.c
@@ -205,7 +205,7 @@ static int encode_sample_description(AVCodecContext *avctx)
     ASS *ass;
     ASSStyle *style;
     int i, j;
-    uint32_t tsmb_size, tsmb_type, back_color, style_color;
+    uint32_t tsmb_size, tsmb_type, back_color = 0, style_color;
     uint16_t style_start, style_end, fontID, count;
     int font_names_total_len = 0;
     MovTextContext *s = avctx->priv_data;

More information about the ffmpeg-devel mailing list