opus
HanBaoBao
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| opus | HanBaoBao | |
|---|---|---|
| 26 | 1 | |
| 2,092 | 29 | |
| 3.6% | - | |
| 9.7 | 0.0 | |
| 11 days ago | about 2 years ago | |
| C | Java | |
| GNU General Public License v3.0 or later | - |
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opus
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TSAC: Low Bitrate Audio Compression
Opus doesn't support 44.1 kHz because compatibility and effort/benefit ratio:
https://github.com/xiph/opus/issues/43
The browser audio limitation is presumably a workaround to some bug or performance limitation that was relevant at some point in history (the site was created in 2014).
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Permutation Iteration and Random Access
There is a pattern here (that also goes with the author's prior article on inverting gauss' sum formula): Generally if if you can make a formula that counts the combination of things you can convert that into a code to encode and decode those combinations into indexes.
So for example the opus audio codec needs to encode/decode vectors of dimension n whos absolute values sum to k. https://github.com/xiph/opus/blob/master/celt/cwrs.c#L74
Or this rolling cuckoo filter that optimally encode/decode four sorted numbers in a range 0..2N with the constraint that the they span a range of N. https://github.com/sipa/bitcoin/blob/202006_cuckoo_filter/sr...
If you're lucky there will be closed form expressions for the encoding and decoding equations. (There for both of the above, at least for some parameters, but in both those examples the implementations use small tables because for the ranges involved the tables end up being faster than sqrts).
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A CPU in Sunvox
Too bad 10Hz is a too slow to generate audio-rate bitops music.
(e.g. https://github.com/xiph/opus/blob/master/tests/test_opus_enc... )
- L’avenir de la loi Hadopi suspendu à une décision de la justice européenne
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Global Underground Disk Images
Could anyone help me get a disk image files for older Global Underground CDs? I encoded my old CDs into subpar mp3 files, and I'd now like to have high-quality Opus encodings and experiment across various bitrates.
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Which is better Opus or AC3?
Presumably, OP is referring to the Opus audio codec versus Dolby's AC3 codec.
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HD: Opus?
Indeed. https://opus-codec.org/
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Multiple tags with the same name in metadata
If there are multiple tags with the same name, Ffmpeg will only use the last tag. If you really need to have multiple tags with the same name in your OPUS files, use opusenc instead (https://opus-codec.org/). Beware that some playback software does not display multiple artists gracefully.
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I built a Zoom clone 100% IN RUST
AFAIK ogg isn't really suitable for low latency audio streaming. Consider the Opus codec instead.
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ffmpeg libopus producing larger file size for the same bitrate as compared to vorbis
I have asked on GitHub also https://github.com/xiph/opus/issues/263 in anyone wants to respond there.
HanBaoBao
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Opus – an open source parallel corpus
The Opus OpenSubtitles corpus was very useful when I was creating this Chinese-English dictionary app: https://github.com/ReubenBond/HanBaoBao. The tool which creates the dictionary database aggregates several sources, including processing Chinese subtitles for word frequency to inform the most likely cuts when performing word segmentation.
What are some alternatives?
libvorbis - Haskell binding for libvorbis, for decoding Ogg Vorbis audio files
argos-translate - Open-source offline translation library written in Python
go-m3u8 - Parse and generate m3u8 playlists for Apple HTTP Live Streaming (HLS) in Golang (ported from gem https://github.com/sethdeckard/m3u8)
analysis-pinyin - 🛵 This Pinyin Analysis plugin is used to do conversion between Chinese characters and Pinyin.
vorbis - Reference implementation of the Ogg Vorbis audio format.
vgmstream - vgmstream - A library for playback of various streamed audio formats used in video games.
libopenaptx - Open Source implementation of Audio Processing Technology codec (aptX)
vgmstream - vgmstream - A library for playback of various streamed audio formats used in video games. [Moved to: https://github.com/vgmstream/vgmstream]
audiopus_sys - Rust FFI-binding of Opus.
AppleNeuralHash2ONNX - Convert Apple NeuralHash model for CSAM Detection to ONNX.
homebrew-macos-cross-toolchains - macOS cross compiler toolchains