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- Release Notes
- =============
-
- * 0.9 "Harmony" December, 2011
-
-
- General notes
- -------------
- This release is binary compatible with 0.8. The 'ffmpeg' command-line tool has
- been extended to also support the command line syntax and features of a tool
- called avconv.
-
- Additionally, this release introduces a number of new interesting codecs
- such as the Apple Prores, Flash Screen Video 2 and Windows Media Image,
- and muxers such as LATM or CELT in Ogg, among many others. Moreover, our
- H.264 decoder has been improved to decode 4:2:2 material and our libx264
- wrapper now allows to produce 4:2:2 and 4:4:4 video.
-
- See the Changelog file for a list of significant changes. Note, there
- are many more new features and bugfixes than whats listed there.
-
- Bugreports against FFmpeg git master or the most recent FFmpeg release are
- accepted. If you are experiencing issues with any formally released version of
- FFmpeg, please try git master to check if the issue still exists. If it does,
- make your report against the development code following the usual bug reporting
- guidelines.
-
-
- API changes
- -----------
-
- A number of additional APIs have been introduced and some existing
- functions have been deprecated and are scheduled for removal in the next
- release. Significant API changes include:
-
- * new audio decoding API which decodes from an AVPacket to an AVFrame and
- is able to use AVCodecContext.get_buffer() in the similar way as video decoding.
-
- * new audio encoding API which encodes from an AVFrame to an AVPacket, thus
- allowing it to properly output timing information and side data.
-
- * rewritten AVOptions API with better built-in support for private options.
-
- * private options support for demuxers [avformat_open_input()], muxers
- [avformat_write_header()], encoders and decoders [avcodec_open2()].
- As a result, many format- or codec-specific fields and flags in AVFormatContext
- and AVCodecContext were deprecated -- notably most of CODEC_FLAG2_* and many
- CODEC_FLAG_*.
-
- * new API for custom IO interrupt callbacks.
-
- * #include cleanup in libavutil -- libavutil/avutil.h no longer includes all
- the other headers in libavutil, they must be included manually. One specific
- result is that libavutil/mathematics.h is no longer included from
- libavcodec/avcodec.h, which is a common source of errors.
-
- Please see the file doc/APIchanges for details along with
- similar programmer-centric information.
-
-
-
- Other notable changes
- ---------------------
-
- Libavcodec and libavformat built as shared libraries now hide non-public
- symbols. This will break applications using those symbols. Possible solutions
- are, in order of preference:
- 1) Try finding a way of accomplishing the same with public API.
- 2) If there is no corresponding public API, but you think there should be,
- post a request on the user mailing list or IRC channel.
- 3) Finally if your program needs access to FFmpeg / libavcodec / libavformat
- internals for some special reason then the best solution is to link statically.
-
- Please see the Changelog file for a more detailed list of changes.
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