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n2.4

9 years ago

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.

âš  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