mozilla/mozjpeg on Hacker News

…for transparency and then compresses it to either JPG using MozJPEG or to PNG using PNGQuant. [1] https://github.com/mozilla/mozjpeg [2] https://pngquant.org

comment by vunderba · 2025-10-22 · in Scripts I wrote that I use all the time

…but I might do it later. [1] https://libjxl.readthedocs.io/en/latest/api_encoder.html#_CP... [2] https://github.com/mozilla/mozjpeg/blob/6c9f0897afa1c2738d72...

comment by wojtek1942 · 2024-05-20 · in Show HN: I built an image optimization tool based on Google's new Jpegli encoder

…JPG (for backwards compatibility when there's no AVIF): mozjpeg https://github.com/mozilla/mozjpeg

comment by theandrewbailey · 2024-01-05 · in Ask HN: What's your preferred tool or library for image compression?

…WebP implementations. [1] https://research.mozilla.org/2014/03/05/introducing-the-mozj... [2] https://github.com/mozilla/mozjpeg

comment by Fice · 2023-12-15 · in WebP is so great except it's not (2021)

…it is still a jpeg, it has a much better compatibility story, which the author alluded to. [1] https://github.com/mozilla/mozjpeg

comment by richeyryan · 2023-12-08 · in It's the future – you can stop using JPEGs

…to libjpeg-turbo if the changes aren't specific to newly-added MozJPEG-only compression code. https://github.com/mozilla/mozjpeg#mozilla-jpeg-encoder-proj...

comment by jahav · 2023-07-20 · in JPEG XL: How it started, how it’s going

…to break ABI/API several times over and add incompatible, non-standard format extensions[2]. [1] https://github.com/mozilla/mozjpeg [2] https://en.wikipedia.org/wiki/Libjpeg#History

comment by st_goliath · 2023-07-04 · in libjpeg-turbo 3.0 has been released, and why there may never be a 3.1

No. See https://github.com/mozilla/mozjpeg Also, there is a fairly big problem with JPG that the ‘quality’ setting is not calibrated. That is you might look at one image and think it looks fine (which is subjective, depends on what you…

comment by PaulHoule · 2023-03-12 · in Are all JPEG compression implementations the same?

…of the quantization just like this article suggests (9 and 12 vs the libjpeg default of 16). [1] https://github.com/mozilla/mozjpeg [2] https://github.com/mozilla/mozjpeg/blob/5c6a0f0971edf1ed3cf3... [3]…

comment by jncraton · 2022-06-24 · in Fighting JPEG color banding

…with high density. At least this problem was highlighted by Kornel, one of the mozjpeg author here: https://github.com/mozilla/mozjpeg/issues/76 > the employed solution only modifies first element from [16,17] to [10,16]. Correction: 16…

comment by homm · 2022-06-24 · in Fighting JPEG color banding

…JPEGs download and decode so fast that the cool 'enhance' animation is rarely seen anymore. [0] https://github.com/mozilla/mozjpeg

comment by theandrewbailey · 2022-04-27 · in FFmpeg now supports JPEG XL

…greatly improved the state of art jpeg encodig, while maintaining full backwards compatibility https://github.com/mozilla/mozjpeg but there's a limit on what can be done with the primitives that jpeg offers. for example, jpeg is stuck with…

comment by nextaccountic · 2022-03-11 · in AVIF has landed (2020)

…https://jpeg.rocks/ was posted here: https://news.ycombinator.com/item?id=25712301 This is based on https://github.com/mozilla/mozjpeg , which is a patched version of https://github.com/libjpeg-turbo/libjpeg-turbo

comment by tehnicaorg · 2021-01-10 · in The Future of Libjpeg-Turbo

…it comes with many settings and routines (both lossless and lossy) that can be configured. [1] https://github.com/mozilla/mozjpeg [2] https://github.com/google/guetzli

comment by fireattack · 2021-01-10 · in Show HN: JPEG.rocks – Privacy-aware JPEG optimizer built with WebAssembly

…features trellis quantization for JPEG encoding. I wonder how this decoder would do with that? [1] https://github.com/mozilla/mozjpeg

comment by a_e_k · 2020-07-10 · in Jpeg2png: Silky smooth JPEG decoding – no more artifacts (2016)

…busercontent.com/assets/72159/11488537/3d... [5] http://www.imagemagick.org/Usage/filter/nicolas/ [6] https://github.com/mozilla/mozjpeg [7] https://twitter.com/vmdanilov/status/745321798309412865

comment by vladdanilov · 2017-01-10 · in Bringing Wide Color to Instagram

…Another challenge here is to estimate the current image quality and the target error. [1] https://github.com/mozilla/mozjpeg/issues/129

comment by vladdanilov · 2016-12-28 · in Faster Images using HTTP2 and Progressive JPEGs

How does this compare to mozjpeg [1] ? [1] https://github.com/mozilla/mozjpeg

comment by niftich · 2016-10-21 · in Guetzli – Google's new “zopfli-like” JPEG encoder

Has anybody tried mozjpeg? https://github.com/mozilla/mozjpeg It works much better than any of the alternatives listed here, I'm surprised noone mentioned it yet. Here is an image compressed to the same size with mozjpeg…

comment by projectsymphony · 2016-09-28 · in Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG

…of cool tricks (like trellis optimization) in order to get the absolute best quality for the size. https://github.com/mozilla/mozjpeg

comment by saturncoleus · 2016-05-11 · in Show HN: Smlr – re-encode jpegs using butteraugli visual quality measurement

…computer-generated graphics, and rarely in photos, and probably that's why nobody cared to fix it. https://github.com/mozilla/mozjpeg/issues/193

comment by pornel · 2015-12-08 · in Grand Image Compression Challenge at ICIP 2016

Thanks for pointing this out! Filed a bug: https://github.com/mozilla/mozjpeg/issues/139 I said in another comment that we'd release 3.0 tomorrow, we'll probably hold up the release to investigate this.

comment by joshmoz · 2014-12-29 · in MozJPEG 3.0

mozjpeg has such a bug opened too: https://github.com/mozilla/mozjpeg/issues/8 This isn't exactly new ground beign covered here, nor is it tied to one image format, so I wish people would be a little less NIH-y sometimes...

comment by Daemon404 · 2014-08-06 · in Using Mozjpeg to Create Efficient JPEGs

…while still presenting itself as libjpeg version 6 to the system, which is very evil. Open Issues: https://github.com/mozilla/mozjpeg/issues/67 https://github.com/mozilla/mozjpeg/issues/21

comment by Daemon404 · 2014-07-16 · in Mozilla Advances JPEG Encoding with Mozjpeg 2.0

I believe this merge shows the C code that implements the crush functionality: https://github.com/mozilla/mozjpeg/commit/c31dea21188b48498d...

comment by briansmith · 2014-03-05 · in Introducing the ‘mozjpeg’ Project