From 2a9b4c0f05c2c1b3938e57c477268f1ed68aa096 Mon Sep 17 00:00:00 2001 From: Timothy Gu Date: Sun, 13 Jul 2014 19:04:57 -0700 Subject: Add a release note for 2.3 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Based on a patch by Clément Bœsch . Signed-off-by: Timothy Gu Signed-off-by: Michael Niedermayer --- RELEASE_NOTES | 172 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 172 insertions(+) create mode 100644 RELEASE_NOTES diff --git a/RELEASE_NOTES b/RELEASE_NOTES new file mode 100644 index 0000000000..685be837d4 --- /dev/null +++ b/RELEASE_NOTES @@ -0,0 +1,172 @@ + ┌─────────────────────────────────┐ + │ RELEASE NOTES for FFmpeg 2.3 │ + └─────────────────────────────────┘ + + The FFmpeg Project proudly presents FFmpeg 2.3, a major release with all + the great features committed during the three-month period since the + release of FFmpeg 2.2. + + In this release, there are lots of internal overhauls that make FFmpeg a + more accessible project for new developers. Many important new features + like native Opus decoder and QTKit and AVFoundation input devices are also + committed. + + Because of the increasing difficulty to maintain and lack of maintainers, + we are very sorry to say that we have removed all Blackfin and SPARC + architecture assembly optimizations with the cleanups done. If you are + interested in maintaining optimization for these two architecture, feel + free to contact us and we will restore the code! + + Since this release, the traditional Changelog file is upgraded to this + modern-looking release note. Old changelogs are moved to doc/Changelog.old. + + Enjoy! + + ┌────────────────────────────┐ + │ * API Information │ + └────────────────────────────┘ + + FFmpeg 2.3 is completely source-compatible to the FFmpeg 2.2 series. There + are however some API deprecations that you need to take care of. Use `git + diff n2.2 n2.3 doc/APIchanges` to show the list of added and deprecated + APIs. FFmpeg 2.3 includes the following library versions: + + • libavutil xx.yy.1zz + • libavcodec xx.yy.1zz + • libavformat xx.yy.1zz + • libavdevice xx.yy.1zz + • libavfilter xx.yy.1zz + • libswscale xx.yy.1zz + • libswresample xx.yy.1zz + • libpostproc xx.yy.1zz + + Please refer to the doc/APIChanges file for more information. + + ┌────────────────────────────┐ + │ New Optimization │ + └────────────────────────────┘ + + We are excited to announce that we have committed new x86 assembly + optimization for HEVC, and FFmpeg's audio resampler libswresample. ARM + users will get a boost in MLP/TrueHD decoding thanks to new optimization. + Decoding Huffyuv also got a major boost from optimization on the C code. + + Of special interest for Microsoft Visual Studio users, we have also + converted some preexisting x86 assembly to NASM/Yasm format compatible + with MSVC setup, especially in the area of audio resampling. + + Another major feature in this release is the introduction of AArch64 + (ARMv8) assembly optimization. AArch64 is another name for the first + 64-bit ARM architecture, used by Apple A7 SoC inside iPhone 5S. We have + already ported some 32-bit ARM to AArch64, but more work is underway. + + ┌────────────────────────────┐ + │ Native Opus decoder │ + └────────────────────────────┘ + + Opus is an open audio format jointly developed by Xiph.Org, Mozilla, + Skype/Microsoft, and Broadcom. It combines the features of the Skype Cilk + speech codec and the Xiph.Org CELT music codec into one low-latency + codec. Decoding Opus is already possible since FFmpeg 1.0 using the + libopus library, but the new Opus native decoder brings a higher level of + stability and speed. + + ┌────────────────────────────┐ + │ QTKit and AVFoundation │ + └────────────────────────────┘ + + For OS X users, the new QTKit and AVFoundation devices allow you to use + the integrated camera on Macs. AVFoundation is a newer API only available + on OS X 10.7 "Lion" or newer. For users with older OS X systems, the + QTKit device using the older OS X API is for you. + + ┌────────────────────────────┐ + │ API Additions │ + └────────────────────────────┘ + + In this release, stream side data are introduced as AVStream.side_data as + a way to store miscellaneous stream-wide information. The format is + similar to the previously anonymous structure AVPacket.side_data (now + named as AVPacketSideData). With this change, audio ReplayGain + information and video rotation matrix are now exported through this API, + if available in the demuxer. + + We also have improved libswresample's Doxygen API documentation, so new + developers wishing to use FFmpeg's excellent libraries can get started + more easily and faster. + + ┌────────────────────────────┐ + │ Last But Not Least │ + └────────────────────────────┘ + + Other interesting new features including hqx video filter, a pixel art + scaling filter; a fixed-point AC-3 decoder contributed by Imagination + Technologies; an On2 TrueMotion VP7 video decoder; an HTML5 WebVTT + subtitle decoder that allows creation of WebVTT from any text-based + subtitles; and an 1-bit Direct Stream Digital audio decoder. + + ┌────────────────────────────┐ + │ ★ List of New Features │ + └────────────────────────────┘ + + ┌────────────────────────────┐ + │ Command line tools │ + └────────────────────────────┘ + + • Support for decoding through DXVA2 in ffmpeg + + ┌────────────────────────────┐ + │ libavcodec │ + └────────────────────────────┘ + + • AC3 fixed-point decoding + • VP7 video decoder + • Alias PIX image encoder and decoder + • Improvements to the BRender PIX image decoder + • Improvements to the XBM decoder + • Improvements to OpenEXR image decoder + • Support decoding 16-bit RLE SGI images + • Direct Stream Digital (DSD) decoder + • On2 AVC (Audio for Video) decoder + • Native Opus decoder + • WebVTT encoder + + ┌────────────────────────────┐ + │ libavdevice │ + └────────────────────────────┘ + + • QTKit input device + • GDI screen grabbing for Windows + • AVFoundation input device + + ┌────────────────────────────┐ + │ libavformat │ + └────────────────────────────┘ + + • subfile protocol + • Phantom Cine demuxer + • Alternative rendition support for HTTP Live Streaming + • Magic Lantern Video (MLV) demuxer + • Image format auto-detection + • LRC lyric file demuxer and muxer + • Samba protocol (via libsmbclient) + + ┌────────────────────────────┐ + │ libavfilter │ + └────────────────────────────┘ + + • shuffleplanes filter + • libbs2b-based stereo-to-binaural audio filter + • showcqt multimedia filter + • zoompan filter + • signalstats filter + • hqx filter (hq2x, hq3x, hq4x) + • flanger filter + + ┌────────────────────────────┐ + │ ⚠ Behaviour changes │ + └────────────────────────────┘ + + • libx264 reference frames count is now limited depending on level chosen + • Because of the new image format auto-detection feature, you don't need to + specify image format when decoding an image with no extension. -- cgit v1.2.3