+version 10:
+- av_strnstr
+- support ID3v2 tags in ASF files
+
+
+version 9:
+- av_basename and av_dirname
+- adobe and limelight publisher authentication in RTMP
+- VDPAU hardware acceleration through normal hwaccel
+- SRTP support
+
+
+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:
+- metadata (INFO tag) support in WAV muxer
+- support for building DLLs using MSVC
+- remove avserver daemon mode
+- support building on the Plan 9 operating system
+- ffv1: support version 1.3
+
+
+version 9_beta1: