atdec fails to decode http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_320x180.mp4

Marked as a regression because it's now the default decoder in OS X

iMac:Commands$ LC_ALL=C GST_DEBUG=*atdec*:5 ./gst-launch-1.0 playbin uri=file:///Users/fluendo/Downloads/BigBuckBunny_320x180.mp4 
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Redistribute latency...
0:00:00.194746000 54710    0x1008f1b20 DEBUG                  atdec atdec.c:181:gst_atdec_start:<atdec0> start
0:00:00.194989000 54710    0x1008f1b20 DEBUG                  atdec atdec.c:271:gst_atdec_set_format:<atdec0> set_format
0:00:00.203590000 54710    0x1008f1b20 WARN                   atdec atdec.c:331:gst_atdec_set_format:<atdec0> error: AudioQueueSetOfflineRenderFormat returned error: 560226676
ERROR: from element /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstATDec:atdec0: The stream is in the wrong format.
Additional debug info:
atdec.c(331): gst_atdec_set_format (): /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstATDec:atdec0:
AudioQueueSetOfflineRenderFormat returned error: 560226676
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...