+version 9:
+- av_basename and av_dirname
+- adobe and limelight publisher authentication in RTMP
+
+
+version 9_beta3:
+- ashowinfo audio filter
+- 24-bit FLAC encoding
+- audio volume filter
+- deprecated the avconv -vol option. the volume filter is to be used instead.
+- multi-channel ALAC encoding up to 7.1
+- TAK demuxer, parser, and decoder
+- adaptive frame-level multithreading for H.264
+
+
+version 9_beta2: