API changes, most recent first:
+2013-10-xx - xxxxxxx -libswscale 2.5.101 - options.c
+ Change default scaler to bicubic
+
+2013-10-03 - xxxxxxx - lavc 55.34.100 - avcodec.h
+ Add av_codec_get_max_lowres()
+
2013-10-02 - xxxxxxx - lavf 55.19.100 - avformat.h
Add audio/video/subtitle AVCodec fields to AVFormatContext to force specific
decoders