---
 libavformat/movenc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 30c500e..1470ebf 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -2742,6 +2742,11 @@ static int mov_write_ftyp_tag(AVIOContext *pb, 
AVFormatContext *s)
             ffio_wfourcc(pb, "avc1");
     }
 
+    // We add tfdt atoms when fragmenting, signal this with the iso6 compatible
+    // brand. This is compatible with users that don't understand tfdt.
+    if (mov->flags & FF_MOV_FLAG_FRAGMENT)
+        ffio_wfourcc(pb, "iso6");
+
     if (mov->mode == MODE_3GP)
         ffio_wfourcc(pb, has_h264 ? "3gp6":"3gp4");
     else if (mov->mode & MODE_3G2)
-- 
1.9.3 (Apple Git-50)

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