┌────────────────────────────────────────┐
  │ RELEASE NOTES for FFmpeg 2.4 "Fresnel" │
  └────────────────────────────────────────┘

    The FFmpeg Project proudly presents FFmpeg 2.4 "Fresnel", just 2 months
    after the release of 2.3. Since this wasn't a long time ago, the Changelog
    is a bit short this time.
 
    The most important thing in this release is the major version bump of the
    libraries.  This means that this release is neither ABI-compatible nor
    fully API-compatible. But on the other hand it is aligned with the Libav
    11 release series, and will as a result probably end up being maintained for
    a long time.
 
    As usual, if you have any question on this release or any FFmpeg related
    topic, feel free to join us on the #ffmpeg IRC channel (on
    irc.freenode.net).

 
    ┌────────────────────────────┐

    │ 🔨  API Information         │

    └────────────────────────────┘
 

      FFmpeg 2.4 includes the following library versions:

        • libavutil      54.7.100
        • libavcodec     56.1.100
        • libavformat    56.4.101
        • libavdevice    56.0.100
        • libavfilter     5.1.100
        • libswscale      3.0.100
        • libswresample   1.1.100
        • libpostproc    53.0.100

      Important API changes since 2.3:
 
        • The new field mime_type was added to AVProbeData, which can
          cause crashes, if it is not initialized.
        • Some deprecated functions were removed.
        • The avfilter_graph_parse function was made compatible with Libav.

        • The Matroska demuxer now outputs verbatim ASS packets.

      Please refer to the doc/APIchanges file for more information.

 
  ┌────────────────────────────┐
  │ ★  List of New Features    │
  └────────────────────────────┘
 
    ┌────────────────────────────┐

    │ libavformat                │

    └────────────────────────────┘
 

     • Icecast protocol.

     • API for live metadata updates through event flags.

     • UTF-16 support in text subtitles formats.
     • The ASS muxer now reorders the Dialogue events properly.

     • support for H.261 RTP payload format (RFC 4587)
     • HEVC/H.265 RTP payload format (draft v6) depacketizer

 
    ┌────────────────────────────┐

    │ libavfilter                │

    └────────────────────────────┘
 

     • Ported lenscorrection filter from frei0r filter.
     • Large optimizations in dctdnoiz to make it usable.
     • Added codecview filter to visualize information exported by some codecs.
     • Added silenceremove filter.

 
    ┌────────────────────────────┐

    │ libavutil                  │

    └────────────────────────────┘
 

     • Added clip() function in eval.

 
  ┌────────────────────────────┐
  │ ⚠  Behaviour changes       │
  └────────────────────────────┘
 

   • dctdnoiz filter now uses a block size of 8x8 instead of 16x16 by default

   • -vismv option is deprecated in favor of the codecview filter

   • libmodplug is now detected through pkg-config

   • HTML documentation generation through texi2html is deprecated in
     favor of makeinfo/texi2any

   • ICY metadata are now requested by default with the HTTP protocol