[FFmpeg-devel] [PATCH] mpeg12enc: fix wrong size when copying A53_CC side-data into output

Jacob Lifshay programmerjake at gmail.com
Fri May 16 04:05:39 EEST 2025


Fixes: https://trac.ffmpeg.org/ticket/11591

Signed-off-by: Jacob Lifshay <programmerjake at gmail.com>
---
 libavcodec/mpeg12enc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index 8364368fde..e48437eb8a 100644
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -472,7 +472,7 @@ static int mpeg1_encode_picture_header(MPVMainEncContext *const m)
                     (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
                 put_bits(&s->pb, 8, 0xff);                  // em_data
 
-                ff_copy_bits(&s->pb, side_data->data, side_data->size);
+                ff_copy_bits(&s->pb, side_data->data, side_data->size * 8);
 
                 put_bits(&s->pb, 8, 0xff);                  // marker_bits
             } else {
-- 
2.39.5



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