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TEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromLIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
LIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, andLIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
THE OPUS CODEC
Mozilla Opus in RTP Very simple: 1 RTP payload == 1 Opus packet – From 2.5 ms to 120 ms audio Packets decodable with no OOB signaling – No negotiation failure, always opus/48000/2 – All SDP parameters are informative – Mono/stereo, bitrate, audio bandwidth, frame size, mode, etc., signaled in band – Receiver decodes all of these transparently Encoder and decoder can run at differentLIBOPUS 1.1.5
This Opus 1.1.5 release backports the surround encoder bug fix from 1.2-beta. There are no other changes compared to 1.1.4. Source code:opus-1.1.5.tar.gz
LIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUSENC 0.2.1
This release fixes two minor bugs: a gapless bug in the LPC filtering a crash on destroy when using the pull APILIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzTEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromLIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
LIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, andLIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
THE OPUS CODEC
Mozilla Opus in RTP Very simple: 1 RTP payload == 1 Opus packet – From 2.5 ms to 120 ms audio Packets decodable with no OOB signaling – No negotiation failure, always opus/48000/2 – All SDP parameters are informative – Mono/stereo, bitrate, audio bandwidth, frame size, mode, etc., signaled in band – Receiver decodes all of these transparently Encoder and decoder can run at differentLIBOPUS 1.1.5
This Opus 1.1.5 release backports the surround encoder bug fix from 1.2-beta. There are no other changes compared to 1.1.4. Source code:opus-1.1.5.tar.gz
LIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUSENC 0.2.1
This release fixes two minor bugs: a gapless bug in the LPC filtering a crash on destroy when using the pull APILIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzLIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, and OPUSFILE: HEADER INFORMATION Functions for manipulating header data. These functions manipulate the OpusHead and OpusTags structures, which describe the audio parameters and tag-value metadata, respectively. These can be used to query the headers returned by libopusfile, or to parse Opus headers from sources other than an Ogg Opus stream, provided they use the same format.LIBOPUS 1.0.1
This release includes minor updates (mostly related to the the build system) that didnot make it to the final RFC. It is fully compliant with the Opus specifLIBOPUS 1.1.4
This Opus 1.1.4 release fixes a single bug. A specially-crafted Opus packet could cause an integer wrap-around in the SILK LSF stabilization code. This would cause an out-of-bounds read 256 bytes before a constant table.LIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzLIBOPUS 1.1.5
This Opus 1.1.5 release backports the surround encoder bug fix from 1.2-beta. There are no other changes compared to 1.1.4. Source code:opus-1.1.5.tar.gz
LIBOPUS 0.9.8
This version matches version -10 of the draft and fixes several glitches caused by mode switching and other corner cases. This required breaking the bit-stream for the SILK-only stereo and hybridstereo modes.
LIBOPUS 1.0.0 RC
This is a release candidate for the final 1.0 release. Other than the RFC number in the comments, this code is expected to be the same as the final RFC and 1.0 release.LIBOPUS 1.1.1 RC
This is a release candidate for the upcoming 1.1.1 version. This release includes further ARM optimizations. Source code: opus-1.1.1-rc.tar.gzLIBOPUS 0.9.10
This version matches version -12 of the draft and fixes minor issues brought up beforethe upcoming IETF last call. There is no change tothe bit-stream.
TEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromLIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, andLIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
LIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
LIBOPUS 1.1.4
This Opus 1.1.4 release fixes a single bug. A specially-crafted Opus packet could cause an integer wrap-around in the SILK LSF stabilization code. This would cause an out-of-bounds read 256 bytes before a constant table.LIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUS 1.1.5
This Opus 1.1.5 release backports the surround encoder bug fix from 1.2-beta. There are no other changes compared to 1.1.4. Source code:opus-1.1.5.tar.gz
LIBOPUS 1.0.0 RC
This is a release candidate for the final 1.0 release. Other than the RFC number in the comments, this code is expected to be the same as the final RFC and 1.0 release.LIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzTEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromLIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, andLIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
LIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
LIBOPUS 1.1.4
This Opus 1.1.4 release fixes a single bug. A specially-crafted Opus packet could cause an integer wrap-around in the SILK LSF stabilization code. This would cause an out-of-bounds read 256 bytes before a constant table.LIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUS 1.1.5
This Opus 1.1.5 release backports the surround encoder bug fix from 1.2-beta. There are no other changes compared to 1.1.4. Source code:opus-1.1.5.tar.gz
LIBOPUS 1.0.0 RC
This is a release candidate for the final 1.0 release. Other than the RFC number in the comments, this code is expected to be the same as the final RFC and 1.0 release.LIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzLIBOPUS 1.0.1
This release includes minor updates (mostly related to the the build system) that didnot make it to the final RFC. It is fully compliant with the Opus specifLIBOPUS 1.1.4
This Opus 1.1.4 release fixes a single bug. A specially-crafted Opus packet could cause an integer wrap-around in the SILK LSF stabilization code. This would cause an out-of-bounds read 256 bytes before a constant table.LIBOPUS 1.3-RC
This Opus 1.3-rc release candidate of the upcoming Opus 1.3 includes:. Making it possible to use SILK down to bitrates around 5 kb/s; Using wideband encoding down to 9 kb/s; Improving security (including a new --enable-hardening option); Minor quality improvement on tonesLIBOPUS 1.1.5
This Opus 1.1.5 release backports the surround encoder bug fix from 1.2-beta. There are no other changes compared to 1.1.4. Source code:opus-1.1.5.tar.gz
LIBOPUS 0.9.8
This version matches version -10 of the draft and fixes several glitches caused by mode switching and other corner cases. This required breaking the bit-stream for the SILK-only stereo and hybridstereo modes.
LIBOPUS 1.0.0 RC
This is a release candidate for the final 1.0 release. Other than the RFC number in the comments, this code is expected to be the same as the final RFC and 1.0 release.OPUS-TOOLS 0.1.9
This release adds support for 32-bit floating point WAV output and fixes a number of minor issues. Source code: opus-tools-0.1.9.tar.gzLIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzLIBOPUSENC 0.2
This release adds support for Ambisonics mapping families 2 and 3. It also fixes a few bugs in libopusenc 0.1.1, including an occasional failure in ope_encoder_drain().LIBOPUS 0.9.10
This version matches version -12 of the draft and fixes minor issues brought up beforethe upcoming IETF last call. There is no change tothe bit-stream.
TEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromLIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
LIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, andLIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
LIBOPUS 1.0.1
This release includes minor updates (mostly related to the the build system) that didnot make it to the final RFC. It is fully compliant with the Opus specifLIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUS 1.1.1 RC
This is a release candidate for the upcoming 1.1.1 version. This release includes further ARM optimizations. Source code: opus-1.1.1-rc.tar.gzLIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzLIBOPUS 1.0.0 RC
This is a release candidate for the final 1.0 release. Other than the RFC number in the comments, this code is expected to be the same as the final RFC and 1.0 release.TEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromLIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
LIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, andLIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
LIBOPUS 1.0.1
This release includes minor updates (mostly related to the the build system) that didnot make it to the final RFC. It is fully compliant with the Opus specifLIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUS 1.1.1 RC
This is a release candidate for the upcoming 1.1.1 version. This release includes further ARM optimizations. Source code: opus-1.1.1-rc.tar.gzLIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzLIBOPUS 1.0.0 RC
This is a release candidate for the final 1.0 release. Other than the RFC number in the comments, this code is expected to be the same as the final RFC and 1.0 release.LIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, andLIBOPUS 1.0.1
This release includes minor updates (mostly related to the the build system) that didnot make it to the final RFC. It is fully compliant with the Opus specifLIBOPUS 1.0.0
This release is identical to the final Opus reference implementation included in RFC6716. Source code: opus-1.0.0.tar.gzLIBOPUS 1.1.4
This Opus 1.1.4 release fixes a single bug. A specially-crafted Opus packet could cause an integer wrap-around in the SILK LSF stabilization code. This would cause an out-of-bounds read 256 bytes before a constant table.LIBOPUS 1.0.3
Opus 1.0.3 includes a backport of the new 1.1 surround API. Aside from that, it includes fixes for a few minor glitches during mode switching, some minor fixed-point fixes, and fixes a regression in the FEC code introduced in 1.0.2.LIBOPUS 1.0.0 RC
This is a release candidate for the final 1.0 release. Other than the RFC number in the comments, this code is expected to be the same as the final RFC and 1.0 release.LIBOPUS 1.1.1 RC
This is a release candidate for the upcoming 1.1.1 version. This release includes further ARM optimizations. Source code: opus-1.1.1-rc.tar.gzOPUS-TOOLS 0.1.9
This release adds support for 32-bit floating point WAV output and fixes a number of minor issues. Source code: opus-tools-0.1.9.tar.gzLIBOPUS 1.0.1 RC
This is a release candidate for the upcoming 1.0.1 release. The release includesminor updates (mostly related to the build system) that did not make it to thLIBOPUSENC 0.1.1
This release fixes a few bugs in libopusenc 0.1, including the sample-accuratehandling at the end of files. It also fixes crashes ina few use cases.
DEVELOPMENT
Opus development Discussion. Development chat takes place on #opus on irc.freenode.net (→ Webchat). The Xiph.Org wiki has an Opus Todo page, and the IETF Codec WG page has list archives, meeting minutes, and technical presentation. Monty’s CELT demo page provides a broad overview of the MDCT layer of Opus.. Contributing. If you wish to contribute to Opus, see the Opus contributing wikiTEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromPRESENTATIONS
Opus, the open standard, high quality codec. Presentation, documentation, comparison with other formats, download links, sourcecode repository.
OPUSFILE 0.12
No Windows build is available for this release. Developers should integrate the source code directly into their applications. Programming documentation is available in tree and online. The library is functional, but there are likely issues we didn’t find in our owntesting.
LIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.2.1
This Opus 1.2.1 minor release fixes a relatively rare issue where the 1.2 encoder would wrongly assume a signal to be bandlimited to 12 kHz and not encode frequencies between 12 and 20 kHz. This only happens on a few clips, but it is good to update to avoid a potential loss of quality. There are no other changes compared to 1.2.LIBOPUS 1.1.3
This Opus 1.1.3 release focuses mainly on optimizations and bug fixes. Changes include: Neon optimizations improving performance on ARMv7 and ARMv8 by up to 15%; Fixes some issues with 16-bit platforms (e.g. TIC55x)
LIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
LIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzDEVELOPMENT
Opus development Discussion. Development chat takes place on #opus on irc.freenode.net (→ Webchat). The Xiph.Org wiki has an Opus Todo page, and the IETF Codec WG page has list archives, meeting minutes, and technical presentation. Monty’s CELT demo page provides a broad overview of the MDCT layer of Opus.. Contributing. If you wish to contribute to Opus, see the Opus contributing wikiTEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromPRESENTATIONS
Opus, the open standard, high quality codec. Presentation, documentation, comparison with other formats, download links, sourcecode repository.
OPUSFILE 0.12
No Windows build is available for this release. Developers should integrate the source code directly into their applications. Programming documentation is available in tree and online. The library is functional, but there are likely issues we didn’t find in our owntesting.
LIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.2.1
This Opus 1.2.1 minor release fixes a relatively rare issue where the 1.2 encoder would wrongly assume a signal to be bandlimited to 12 kHz and not encode frequencies between 12 and 20 kHz. This only happens on a few clips, but it is good to update to avoid a potential loss of quality. There are no other changes compared to 1.2.LIBOPUS 1.1.3
This Opus 1.1.3 release focuses mainly on optimizations and bug fixes. Changes include: Neon optimizations improving performance on ARMv7 and ARMv8 by up to 15%; Fixes some issues with 16-bit platforms (e.g. TIC55x)
LIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
LIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzPRESENTATIONS
Opus, the open standard, high quality codec. Presentation, documentation, comparison with other formats, download links, sourcecode repository.
LIBOPUS 1.2.1
This Opus 1.2.1 minor release fixes a relatively rare issue where the 1.2 encoder would wrongly assume a signal to be bandlimited to 12 kHz and not encode frequencies between 12 and 20 kHz. This only happens on a few clips, but it is good to update to avoid a potential loss of quality. There are no other changes compared to 1.2.LIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, andLIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
LIBOPUS 1.0.1
This release includes minor updates (mostly related to the the build system) that didnot make it to the final RFC. It is fully compliant with the Opus specifLIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUS 1.1.4
This Opus 1.1.4 release fixes a single bug. A specially-crafted Opus packet could cause an integer wrap-around in the SILK LSF stabilization code. This would cause an out-of-bounds read 256 bytes before a constant table.LIBOPUS 1.0.0
This release is identical to the final Opus reference implementation included in RFC6716. Source code: opus-1.0.0.tar.gzLIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gzLIBOPUS 1.1.1 RC
This is a release candidate for the upcoming 1.1.1 version. This release includes further ARM optimizations. Source code: opus-1.1.1-rc.tar.gzDEVELOPMENT
Opus development Discussion. Development chat takes place on #opus on irc.freenode.net (→ Webchat). The Xiph.Org wiki has an Opus Todo page, and the IETF Codec WG page has list archives, meeting minutes, and technical presentation. Monty’s CELT demo page provides a broad overview of the MDCT layer of Opus.. Contributing. If you wish to contribute to Opus, see the Opus contributing wiki LICENSE – OPUS CODECDEVELOPMENTCONTACTPRESENTATIONS License. Opus has a freely available specification, a BSD-licensed, high-quality reference encoder and decoder, and protective, royalty-free licenses for the required patents. The copyright and patent licenses for Opus are automatically granted to everyone and do not require application or approval. The Opus FAQ has more informationon why Opus
TEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromPRESENTATIONS
Opus, the open standard, high quality codec. Presentation, documentation, comparison with other formats, download links, sourcecode repository.
OPUSFILE 0.12
opusfile 0.12. The opusfile library provides seeking, decode, and playback of Opus streams in the Ogg container (.opus files) including over http (s) on posix and windows systems. opusfile depends on libopus and libogg. The included opusurl library for http (s) access depends on opusfile and openssl. Changes since the v0.11 release:LIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
LIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
VOICE CODING WITH OPUS Voice Coding with Opus Koen Vos, Karsten Vandborg Sørensen, Søren Skak Jensen, Jean-Marc ValinLIBOPUS 1.2.1
This Opus 1.2.1 minor release fixes a relatively rare issue where the 1.2 encoder would wrongly assume a signal to be bandlimited to 12 kHz and not encode frequencies between 12 and 20 kHz. This only happens on a few clips, but it is good to update to avoid a potential loss of quality. There are no other changes compared to 1.2.DEVELOPMENT
Opus development Discussion. Development chat takes place on #opus on irc.freenode.net (→ Webchat). The Xiph.Org wiki has an Opus Todo page, and the IETF Codec WG page has list archives, meeting minutes, and technical presentation. Monty’s CELT demo page provides a broad overview of the MDCT layer of Opus.. Contributing. If you wish to contribute to Opus, see the Opus contributing wiki LICENSE – OPUS CODECDEVELOPMENTCONTACTPRESENTATIONS License. Opus has a freely available specification, a BSD-licensed, high-quality reference encoder and decoder, and protective, royalty-free licenses for the required patents. The copyright and patent licenses for Opus are automatically granted to everyone and do not require application or approval. The Opus FAQ has more informationon why Opus
TEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromPRESENTATIONS
Opus, the open standard, high quality codec. Presentation, documentation, comparison with other formats, download links, sourcecode repository.
OPUSFILE 0.12
opusfile 0.12. The opusfile library provides seeking, decode, and playback of Opus streams in the Ogg container (.opus files) including over http (s) on posix and windows systems. opusfile depends on libopus and libogg. The included opusurl library for http (s) access depends on opusfile and openssl. Changes since the v0.11 release:LIBOPUS 1.3
This Opus 1.3 major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page.Changes since 1.2.x include: Improvements to the VAD and speech/music classification using an RNN; Support for ambisonics coding using channel mapping families 2 and 3LIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
LIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
VOICE CODING WITH OPUS Voice Coding with Opus Koen Vos, Karsten Vandborg Sørensen, Søren Skak Jensen, Jean-Marc ValinLIBOPUS 1.2.1
This Opus 1.2.1 minor release fixes a relatively rare issue where the 1.2 encoder would wrongly assume a signal to be bandlimited to 12 kHz and not encode frequencies between 12 and 20 kHz. This only happens on a few clips, but it is good to update to avoid a potential loss of quality. There are no other changes compared to 1.2.TEST VECTORS
Test Vectors. These are the original test vectors for the version of the Opus codec in RFC6716. A copy of these test vectors is available from the IETF.. Those testvectors are still valid (and passing them still shows compliance), but new test vectors, provided with RFC 8251, now allow some decoder improvements while maintaining full compatibility.These new testvectors are also available fromLIBOPUS 1.1.1
x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,; MIPS intrinsics optimizations contributed by Imagination Technologies,; ARM Neon optimizations contributed by Linaro and ARM,; many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, andLIBOPUS 1.1.2
Opus 1.1.2 includes: Fixes encoder or decoder state reset, which would previously disable some run-time selected architecture-specificoptimizations; and
LIBOPUS 1.1
Opus 1.1 includes: New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR) Automatic detection of speech or music to decide which encoding modeto use
LIBOPUS 1.2.1
This Opus 1.2.1 minor release fixes a relatively rare issue where the 1.2 encoder would wrongly assume a signal to be bandlimited to 12 kHz and not encode frequencies between 12 and 20 kHz. This only happens on a few clips, but it is good to update to avoid a potential loss of quality. There are no other changes compared to 1.2.LIBOPUS 1.1.3
This Opus 1.1.3 release focuses mainly on optimizations and bug fixes. Changes include: Neon optimizations improving performance on ARMv7 and ARMv8 by up to 15%; Fixes some issues with 16-bit platforms (e.g. TIC55x)
LIBOPUSENC 0.2.1
This release fixes two minor bugs: a gapless bug in the LPC filtering; a crash on destroy when using the pull API; Source code: libopusenc-0.2.1.tar.gzLIBOPUS 1.1.5
This Opus 1.1.5 release backports the surround encoder bug fix from 1.2-beta. There are no other changes compared to 1.1.4. Source code:opus-1.1.5.tar.gz
LIBOPUS 1.0.2
Opus 1.0.2 fixes an out-of-bounds read that could be triggered by a malicious Opus packet causing an integer wrap-around in the padding code. Considering that the packet would have to be at least 16 MB in size and that no out-of-bounds write is possible, the severity is verylow.
LIBOPUS 0.9.0
Source code: opus-0.9.0.tar.gz. libopus 0.9.0. Feb 15, 2011. Source code: opus-0.9.0.tar.gz* Home
* Downloads
* Documentation
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* Development
* Comparison
* Examples
* Opus FAQ
* License
* Contact
OPUS INTERACTIVE AUDIO CODECOVERVIEW
Opus is a totally open, royalty-free, highly versatile audio codec. Opus is unmatched for interactive speech and music transmission over the Internet, but is also intended for storage and streaming applications. It is standardized by the Internet Engineering Task Force (IETF) as RFC 6716 which incorporated technology from Skype’s SILK codec and Xiph.Org’sCELT codec.
TECHNOLOGY
Opus can handle a wide range of audio applications, including Voice over IP, videoconferencing, in-game chat, and even remote live music performances. It can scale from low bitrate narrowband speech to very high quality stereo music. Supported features are: * Bitrates from 6 kb/s to 510 kb/s * Sampling rates from 8 kHz (narrowband) to 48 kHz (fullband) * Frame sizes from 2.5 ms to 60 ms * Support for both constant bitrate (CBR) and variable bitrate (VBR) * Audio bandwidth from narrowband to fullband * Support for speech and music * Support for mono and stereo * Support for up to 255 channels (multistream frames) * Dynamically adjustable bitrate, audio bandwidth, and frame size * Good loss robustness and packet loss concealment (PLC) * Floating point and fixed-point implementation You can read the full specification, including the reference implementation, in RFC 6716 . An up-to-date implementation of the Opus standard is also available from the downloads page.NEWS
*
LIBOPUS 1.3.1
Apr 12, 2019
This Opus 1.3.1
minor release
fixes an issue with the analysis on files with digital silence (all zeros), especially on x87 builds (mostly affects 32-bit builds). It also includes two new features: * A new OPUS_GET_IN_DTX query to know if the encoder is in DTX mode (last frame was either a comfort noise frame or not encoded at all) * A new (and still experimental) CMake-based build system that is eventually meant to replace the VS2015 build system (the autotools onewill stay).
Source code: opus-1.3.1.tar.gz Win32 binaries: opus-tools-0.2-opus-1.3.1.zip -------------------------*
LIBOPUS 1.3
Oct 18, 2018
This Opus 1.3
major release again brings quality improvements, new features, and bug fixes. You can read all the details in this release demo page . Changes since 1.2.xinclude:
* Improvements to the VAD and speech/music classification using anRNN
* Support for ambisonics coding using channel mapping families 2 and3
* Improvements to stereo speech coding at low bitrate * Using wideband encoding down to 9 kb/s * Making it possible to use SILK down to bitrates around 5 kb/s * Minor quality improvement on tones * Enabling the spec fixes in RFC 8251 by default * Security/hardening improvements Notable bug fixes include: * Fixes to the CELT PLC * Bandwidth detection fixes Source code: opus-1.3.tar.gz Win32 binaries: opus-tools-0.2-opus-1.3.zip -------------------------*
LIBOPUSENC 0.2.1
Oct 9, 2018
This release fixes two minor bugs: * a gapless bug in the LPC filtering * a crash on destroy when using the pull API Source code: libopusenc-0.2.1.tar.gz -------------------------*
OPUSFILE 0.11
Sep 18, 2018
The opusfile library provides seeking, decode, and playback of Opus streams in the Ogg container (.opus files) including over http(s) on posix and windows systems. opusfile depends on libopus and libogg. The included opusurl library for http(s) access depends on opusfile and openssl. Changes since the v0.10 release: * Fix two potential integer overflows. (These were not security-critical unless the compiler took the opportunity provided by the undefined behavior to format your hard drive.) * Allow JPEGs in METADATA_BLOCK_PICTURE tags to include EXIF data. * A few warning fixes for gcc 8. * Make opus_tags_copy return OP_EFAULT on failure instead ofreturning success.
* Various integration and testing environment improvements. This release is backward-compatible with the previous release. We recommend all users upgrade. The library is functional, but there are likely issues we didn’t find in our own testing. Please give feedback in #opus on irc.freenode.net or at opus@xiph.org. Programming documentation is available in tree and online.
Source code: opusfile-0.11.tar.gz,
opusfile-0.11.zip
Windows build: opusfile-v0.11-win32.zip ------------------------- See all news or subscribe via RSS Copyright © 2011-2017 This website is licensed under a Creative Commons Attribution 3.0Unported License .
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