If you have a file with multiple Metadata Keys, the second time you parse
the keys, you will re-alloc c->meta_keys without freeing the old one.
This change will avoid parsing all the consecutive Metadata keys.
---
 libavformat/mov.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index ad718cdaa2..062a62d93b 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -7022,7 +7022,8 @@ static int mov_read_default(MOVContext *c, AVIOContext 
*pb, MOVAtom atom)
         // 
https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/Metadata/Metadata.html
         if (!parse && c->found_hdlr_mdta &&
             atom.type == MKTAG('m','e','t','a') &&
-            a.type == MKTAG('k','e','y','s')) {
+            a.type == MKTAG('k','e','y','s') &&
+            c->meta_keys_count == 0) {
             parse = mov_read_keys;
         }
 
-- 
2.26.2.526.g744177e7f7-goog

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