---
 libavcodec/avcodec.h |    2 ++
 libavformat/isom.c   |    2 ++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 5a69c24..26a8273 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -365,6 +365,8 @@ enum CodecID {
 
     CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
                                 * stream (only used by libavformat) */
+    CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 
Systems
+                                * stream (only used by libavformat) */
     CODEC_ID_FFMETADATA=0x21000,   ///< Dummy codec for streams containing 
only metadata information.
 };
 
diff --git a/libavformat/isom.c b/libavformat/isom.c
index d7c0af1..8b6d538 100644
--- a/libavformat/isom.c
+++ b/libavformat/isom.c
@@ -61,6 +61,8 @@ const AVCodecTag ff_mp4_obj_type[] = {
     { CODEC_ID_VORBIS    , 0xDD }, /* non standard, gpac uses it */
     { CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* non standard, see 
unsupported-embedded-subs-2.mp4 */
     { CODEC_ID_QCELP     , 0xE1 },
+    { CODEC_ID_MPEG4SYSTEMS, 0x01 },
+    { CODEC_ID_MPEG4SYSTEMS, 0x02 },
     { CODEC_ID_NONE      ,    0 },
 };
 
-- 
1.7.3.1

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