---
 libavformat/crypto.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavformat/crypto.c b/libavformat/crypto.c
index b9d3e03..2a17cbf 100644
--- a/libavformat/crypto.c
+++ b/libavformat/crypto.c
@@ -45,9 +45,10 @@ typedef struct {
 } CryptoContext;
 
 #define OFFSET(x) offsetof(CryptoContext, x)
+#define D AV_OPT_FLAG_DECODING_PARAM
 static const AVOption options[] = {
-    {"key", "AES decryption key", OFFSET(key), AV_OPT_TYPE_BINARY },
-    {"iv",  "AES decryption initialization vector", OFFSET(iv),  
AV_OPT_TYPE_BINARY },
+    {"key", "AES decryption key", OFFSET(key), AV_OPT_TYPE_BINARY, .flags = D 
},
+    {"iv",  "AES decryption initialization vector", OFFSET(iv),  
AV_OPT_TYPE_BINARY, .flags = D },
     { NULL }
 };
 
-- 
1.7.7

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