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66 lines
3.6 KiB
Plaintext
66 lines
3.6 KiB
Plaintext
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┌─────────────────────────────────────────────┐
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│ RELEASE NOTES for FFmpeg 2.6 "Grothendieck" │
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└─────────────────────────────────────────────┘
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The FFmpeg Project proudly presents FFmpeg 2.6 "Grothendieck", about 3
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months after the release of FFmpeg 2.5.
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A lot of important work got in this time, so let's start talking about what
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we like to brag the most about: features.
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A lot of people will probably be happy to hear that we now have support for
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NVENC — the Nvidia Video Encoder interface for H.264 encoding — thanks to
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Timo Rothenpieler, with some little help from NVIDIA and Philip Langdale.
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People in the broadcasting industry might also be interested in the first
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steps of closed captions support with the introduction of a decoder by
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Anshul Maheswhwari.
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Regarding filters love, we improved and added many. We could talk about the
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10-bit support in spp, but maybe it's more important to mention the addition
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of colorlevels (yet another color handling filter), tblend (allowing you
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to for example run a diff between successive frames of a video stream), or
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the dcshift audio filter.
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There are also two other important filters landing in libavfilter: palettegen
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and paletteuse. Both submitted by the Stupeflix company. These filters will
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be very useful in case you are looking for creating high quality GIFs, a
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format that still bravely fights annihilation in 2015.
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There are many other new features, but let's follow-up on one big cleanup
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achievement: the libmpcodecs (MPlayer filters) wrapper is finally dead. The
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last remaining filters (softpulldown/repeatfields, eq*, and various
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postprocessing filters) were ported by Arwa Arif (OPW student) and Paul B
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Mahol.
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Concerning API changes, there are not many things to mention. Though, the
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introduction of device inputs and outputs listing by Lukasz Marek is a
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notable addition (try ffmpeg -sources or ffmpeg -sinks for an example of
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the usage). As usual, see doc/APIchanges for more information.
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Now let's talk about optimizations. Ronald S. Bultje made the VP9 decoder
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usable on x86 32-bit systems and pre-ssse3 CPUs like Phenom (even dual core
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Athlons can play 1080p 30fps VP9 content now), so we now secretly hope for
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Google and Mozilla to use ffvp9 instead of libvpx. But VP9 is not the
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center of attention anymore, and HEVC/H.265 is also getting many
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improvements, which include C and x86 ASM optimizations, mainly from James
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Almer, Christophe Gisquet and Pierre-Edouard Lepere.
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Even though we had many x86 contributions, it is not the only architecture
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getting some love, with Seppo Tomperi adding ARM NEON optimizations to the
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HEVC stack, and James Cowgill adding MIPS64 assembly for all kind of audio
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processing code in libavcodec.
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And finally, Michael Niedermayer is still fixing many bugs, dealing with
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most of the boring work such as making releases, applying tons of
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contributors patches, and daily merging the changes from the Libav project.
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A more complete Changelog is available at the root of the project, and the
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complete Git history on http://source.ffmpeg.org.
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We hope you will like this release as much as we enjoyed working on it, and
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as usual, if you have any questions about it, or any FFmpeg related topic,
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feel free to join us on the #ffmpeg IRC channel (on irc.freenode.net) or ask
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on the mailing-lists.
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