From c6aaf0840cf9b2b8cb139ed7110d3d47c2bf3d12 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <cehoyos@ag.or.at>
Date: Tue, 18 Apr 2017 10:56:31 +0200
Subject: lavf/mov: Only copy extradata if it exists.

Avoids undefined call of memcpy(ptr, NULL, 0);
---
 libavformat/mov.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libavformat/mov.c')

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 2995a009a8..03fd90e3d3 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -2321,7 +2321,7 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
         } else if (a.size > 0)
             avio_skip(pb, a.size);
 
-        if (sc->extradata) {
+        if (sc->extradata && st->codecpar->extradata) {
             int extra_size = st->codecpar->extradata_size;
 
             /* Move the current stream extradata to the stream context one. */
-- 
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