From: Michael Niedermayer <[email protected]>

Signed-off-by: Luca Barbato <[email protected]>
---
 libavformat/mxfdec.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 8777965..7bca23d 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -864,6 +864,11 @@ static int mxf_read_generic_descriptor(void *arg, 
AVIOContext *pb, int tag, int
     default:
         /* Private uid used by SONY C0023S01.mxf */
         if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
+            if (descriptor->extradata)
+                av_log(NULL, AV_LOG_WARNING,
+                       "Duplicate sony_mpeg4_extradata\n");
+            av_free(descriptor->extradata);
+            descriptor->extradata_size = 0;
             descriptor->extradata = av_malloc(size + 
FF_INPUT_BUFFER_PADDING_SIZE);
             if (!descriptor->extradata)
                 return AVERROR(ENOMEM);
-- 
1.8.5.1

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