---
 libavcodec/mpeg12enc.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index 5dedabd..26d26c7 100644
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -74,6 +74,8 @@ static void init_uni_ac_vlc(RLTable *rl, uint8_t 
*uni_ac_vlc_len){
     for(i=0; i<128; i++){
         int level= i-64;
         int run;
+        if (!level)
+            continue;
         for(run=0; run<64; run++){
             int len, bits, code;
 
-- 
1.7.3.1

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