83 lines
3.4 KiB
Plaintext
83 lines
3.4 KiB
Plaintext
Release Notes
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=============
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* 0.8 "Forbidden Fruit"
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General notes
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-------------
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This release continues the API cleanups that have begun with the
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previous release. While it is binary compatible with 0.7, many parts of
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the public API were deprecated and will be removed in the git master and
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later releases. Please consult the doc/APIchanges file to see
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intended replacements for the deprecated APIs.
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Furthermore, our work on the 'ffmpeg' command-line tool has resulted in
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major revisions to its interface. In order to not break existing scripts
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and applications, we have chosen to introduce a new tool called
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'avconv', and keep the traditional 'ffmpeg' frontend for end-user's
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convenience. Please see the Changelog file for details how 'avconv'
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differs from 'ffmpeg'.
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Additionally, this release introduces a number of new interesting codecs
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such as the Apple Prores, Flash Screen Video 2 and Windows Media Image,
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and muxers such as LATM or CELT in Ogg, among many others. Moreover, our
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H.264 decoder has been improved to decode 4:2:2 material and our libx264
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wrapper now allows to produce 4:2:2 and 4:4:4 video.
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See the Changelog file for a list of significant changes.
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Please note that our policy on bug reports has not changed. We still only accept
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bug reports against HEAD of the Libav trunk repository. If you are experiencing
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issues with any formally released version of Libav, please try a current version
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of the development code to check if the issue still exists. If it does, make your
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report against the development code following the usual bug reporting guidelines.
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API changes
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-----------
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A number of additional APIs have been introduced and some existing
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functions have been deprecated and are scheduled for removal in the next
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release. Significant API changes include:
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* new audio decoding API which decodes from an AVPacket to an AVFrame and
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is able to use AVCodecContext.get_buffer() in the similar way as video decoding.
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* new audio encoding API which encodes from an AVFrame to an AVPacket, thus
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allowing it to properly output timing information and side data.
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* rewritten AVOptions API with better built-in support for private options.
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* private options support for demuxers [avformat_open_input()], muxers
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[avformat_write_header()], encoders and decoders [avcodec_open2()].
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As a result, many format- or codec-specific fields and flags in AVFormatContext
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and AVCodecContext were deprecated -- notably most of CODEC_FLAG2_* and many
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CODEC_FLAG_*.
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* new API for custom IO interrupt callbacks.
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* #include cleanup in libavutil -- libavutil/avutil.h no longer includes all
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the other headers in libavutil, they must be included manually. One specific
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result is that libavutil/mathematics.h is no longer included from
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libavcodec/avcodec.h, which is a common source of errors.
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Please see the file doc/APIchanges for details along with
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similar programmer-centric information.
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Other notable changes
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---------------------
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Libavcodec and libavformat built as shared libraries now hide non-public
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symbols. This will break applications using those symbols. Possible solutions
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are, in order of preference:
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1) Try finding a way of accomplishing the same with public API.
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2) If there is no corresponding public API, but you think there should be,
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post a request on the user mailing list or IRC channel.
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3) Finally if your program needs access to Libav internals for some special
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reason then the best solution is to link statically.
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Please see the Changelog file for a more detailed list of changes.
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