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Top 18 C Codec Projects
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ffmpeg-libav-tutorial
FFmpeg libav tutorial - learn how media works from basic to transmuxing, transcoding and more. Translations: 🇺🇸 🇨🇳 🇰🇷 🇪🇸 🇻🇳 🇧🇷
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Project mention: Still no love for JPEG XL: Browser maker love-in snubs next-gen image format | news.ycombinator.com | 2024-02-04
Maybe this is what you are looking for:
https://github.com/google/wuffs
"Wuffs is a memory-safe programming language (and a standard library written in that language) for Wrangling Untrusted File Formats Safely."
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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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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Project mention: VRipper, a Python script for extracting audio from V.Smile roms | /r/vsmile | 2023-11-06
VRipper Python Script Foobar2000 VGMStream Source Message
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Project mention: libpng VS libspng - a user suggested alternative | libhunt.com/r/libpng | 2023-10-30
libspng is already in LibHunt. I'm surprised there is no comparison with libpng.
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WorkOS
The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
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Project mention: Zstd Content-Encoding planned to ship with Chrome 123 | news.ycombinator.com | 2024-02-07
I'm still unconvinced about this addition. And I don't even dislike Zstandard.
The main motivation seems to be that while Zstandard is worse than Brotli at the highest level, it's substantially faster than Brotli when data has to be compressed on the fly with a limited computation budget. That might be true, but I'm yet to see any concrete or even anecdotal evidence even in the issue tracker [1] while there exist some benchmarks where both Zstandard and Brotli are fast enough for the web usage even at lower levels [2].
According to their FAQ [3] Meta and Akamai have successfully used Zstandard in their internal network, but my gut feeling is that they never actually tried to optimize Brotli instead. In fact, Meta employs the main author of Zstandard so it would have been easier to tune Zstandard instead of Brotli. While Brotli has some fundamental difference from Zstandard (in particular Brotli doesn't use arithmetic-equivalent coding), no one has concretely demonstrated that difference would prevent Brotli from being fast enough for dynamic contents in my opinion.
[1] https://issues.chromium.org/issues/40196713
[2] https://github.com/powturbo/TurboBench/issues/43
[3] https://docs.google.com/document/d/14dbzMpsYPfkefAJos124uPrl...
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Project mention: The Near-Lossless Image Formats Using Ultra-Fast LZ Codecs | news.ycombinator.com | 2023-04-03
It's important to notice that ZPNG beats virtually all QOI variants, as discovered in: https://github.com/nigeltao/qoir
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And that's PNG, for reading something more hard to come by, like OggVorbis, there's just one tiny mid-level library called libvorbis. (btw does anyone know a working email of the maintainer of that package, I have an update for that too)
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C Codec related posts
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- VRipper, a Python script for extracting audio from V.Smile roms
- Www Which WASM Works
- The WebP 0day
- Permutation Iteration and Random Access
- A CPU in Sunvox
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A note from our sponsor - SaaSHub
www.saashub.com | 19 Mar 2024
Index
What are some of the best open-source Codec projects in C? This list will help you:
Project | Stars | |
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1 | ffmpeg-libav-tutorial | 9,440 |
2 | wuffs | 3,688 |
3 | opus | 2,056 |
4 | minimp3 | 1,462 |
5 | vgmstream | 1,399 |
6 | libspng | 676 |
7 | vorbis | 439 |
8 | TurboBench | 306 |
9 | libopenaptx | 119 |
10 | qoir | 94 |
11 | lz4 | 21 |
12 | arduino-liblame | 18 |
13 | xls | 15 |
14 | bzlib-conduit | 3 |
15 | lz4-conduit | 2 |
16 | libvorbis | 1 |
17 | zlib-bindings | 1 |
18 | lzip | 0 |