API changes, most recent first:
+2015-10-15 - xxxxxxx - lavf 57.4.100
+ Remove the latm demuxer that was a duplicate of the loas demuxer.
+
2015-10-14 - xxxxxxx - lavu 55.4.100 / lavu 55.2.0 - dict.h
Change return type of av_dict_copy() from void to int, so that a proper
error code can be reported.