From d72405b05feabdf51284588c2734cf97dc66ae8a Mon Sep 17 00:00:00 2001
From: Michael Bradshaw <mjbshaw@google.com>
Date: Tue, 26 Jul 2016 10:18:43 -0700
Subject: [PATCH] avformat/matroskaenc: fix Voids with size < 10

---
 libavformat/matroskaenc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 833e77d..79b76ee 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -279,7 +279,7 @@ static void put_ebml_void(AVIOContext *pb, uint64_t size)
     // size we need to reserve so 2 cases, we use 8 bytes to store the
     // size if possible, 1 byte otherwise
     if (size < 10)
-        put_ebml_num(pb, size - 1, 0);
+        put_ebml_num(pb, size - 2, 0);
     else
         put_ebml_num(pb, size - 9, 8);
     ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
-- 
2.9.2