this post was submitted on 06 Aug 2024
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TL:DW, JPEG is getting old in the tooth, which prompted the creation of JPEG XL, which is a fairly future-proof new compression standard that can compress images to the same file size or smaller than regular JPEG while having massively higher quality.
However, JPEG XL support was removed from Google Chrome based browsers in favor of AVIF, a standalone image compression derived from the AV1 video compression codec that is decidedly not future-proof, having some hard-coded limitations, as well as missing some very nice to have features that JPEG XL offers such as progressive image loading and lower hardware requirements. The result of this is that JPEG XL adoption will be severely hamstrung by Google’s decision, which is ultimately pretty lame.
This is why Google keeps getting caught up in monopoly lawsuits.
Modern Google is becoming the Microsoft of the 90s
And they'll make eleventy bajillion dollars in the meantime, plenty of money to pay their inevitable punitive "fines."
Hell old MSs penalty was giving free licenses in markets it never had a grip on, so its "lock 'em in!" model meant the "penalty" benefited them!
Which is funny and said because Microsoft is also the Microsoft of the 90s.
Microsoft is still like this
I tried JPEG XL and it didn’t even make my files extra large. It actually made them SMALLER.
False advertising.
I think you took the wrong enlargement pill.
Just set the pills to wumbo.
Jpeg XL isn’t backwards compatible with existing JPEG renderers. If it was, it’d be a winner. We already have PNG and JPG and now we’ve got people using the annoying webP. Adding another format that requires new decoder support isn’t going to help.
"the annoying webp" AFAIK is the same problem as JPEG XL, apps just didn't implement it.
It is supported in browsers, which is good, but not in third party apps. AVIF or whatever is going to have the same problem.
According to the video, and this article, JPEG XL is backwards compatible with JPEG.
But I'm not sure if that's all that necessary. JPEG XL was designed to be a full, long term replacement to JPEG. Old JPEG's compression is very lossy, while JPEG XL, with the same amount of computational power, speed, and size, outclasses it entirely. PNG is lossless, and thus is not comparable since the file size is so much larger.
JPEG XL, at least from what I'm seeing, does appear to be the best full replacement for JPEG (and it's not like they can't co-exist).
It’s only backwards compatible in that it can re-encode existing jpeg content into the newer format without any image loss. Existing browsers and apps can’t render jpegXL without adding a new decoder.
Why is that a negative?
Legacy client support. Old devices running old browser code can't support a new format without software updates, and that's not always possible. Decoding jxl on a 15yo device that's not upgradable isn't good UX. Sure, you probably can work around that with slow JavaScript decoding for many but it'll be slow and processor intensive. Imagine decoding jxl on a low power arm device or something like a Celeron from the early 2010s and you'll get the idea, it will not be anywhere near as fast as good old jpeg.
That's a good argument, and as a fan of permacomputing and reducing e-waste, I must admit I'm fairly swayed by it.
However, are you sure JPEG XL decode/encode is more computationally heavy than JPEG to where it would struggle on older hardware? This measurement seems to show that it's quite comparable to standard JPEG, unless I'm misunderstanding something (and I very well might be).
That wouldn't help the people stuck on an outdated browser (older, unsupported phones?), but for those who can change their OS, like older PC's, a modern Linux distro with an updated browser would still allow that old hardware to decode JPEG XL's fairly well, I would hope.
Optimized jpegxl decoding can be as fast as jpeg but only if the browser supports the format natively. If you're trying to bolt jxl decoding onto a legacy browser your options become JavaScript and WASM decoding. WASM can be as fast but browsers released before like 2020 won't support it and need to use JavaScript to do the job. Decoding jxl in JavaScript is, let's just say it's not fast and it's not guaranteed to work on legacy browsers and older machines. Additionally any of these bolt on mechanisms require sending the decoder package on page load so unless you're able to load that from the user's cache you pay the bandwidth/time price of downloading and initializing the decoder code before images even start to render on the page. Ultimately bolting on support for the new format just isn't worth the cost of the implementation in many cases so sites usually implement fallback to the older format as well.
Webp succeeded because Google rammed the format through and they did that because they controlled the standard. You'll see the same thing happen with the jpegli format next, it lifts the majority of its featureset from jpegxl and Google controls the standard.
https://xkcd.com/927/
The video actually references that comic at the end.
But I don't see how that applies in your example, since both JPEG and JPEG XL existing in parallel doesn't really have any downsides, it'd just be nice to have the newer option available. The thrust of the video is that Google is kneecapping JPEG XL in favor of their own format, which is not backwards compatible with JPEG in any capacity. So we're getting a brand new format either way, but a monopoly is forcing a worse format.
They're confusing backwards and forwards compatible. The new file format is backwards compatible but the old renderers are not forward compatible with the new format.
JPEG XL in lossless mode actually gives around 50% smaller file sizes than PNG
My understanding is that webp isn't actually all that bad from a technical perspective, it was just annoying because it started getting used widely on the web before all the various tools caught up and implemented support for it.
I just wish more software would support webp files. I remember Reddit converting every image to webp to save on space and bandwidth (smart, imo) but not allowing you to directly upload webp files in posts because it wasn't a supported file format.
If webp was just more standardized, I'd love to use it more. It would certainly save me a ton of storage space.
So… your solution is to stick with extremely dated and objectively bad file formats? You using Windows 95?
What's wrong with PNG?
For what it is? Nothing.
Compared to something like JPEG XL? It is hands down worse in virtually all metrics.
I think this might sound like a weird thing to say, but technical superiority isn't enough to make a convincing argument for adoption. There are plenty of things that are undeniably superior but yet the case for adoption is weak, mostly because (but not solely because) it would be difficult to adopt.
As an example, the French Republican Calendar (and the reformed calendar with 13 months) are both evidently superior to the Gregorian Calendar in terms of regularity but there is no case to argue for their adoption when the Gregorian calendar works well enough.
Another example—metric time. Also proposed as part of the metric system around the same time as it was just gaining ground, 100 seconds in a minute and 100 minutes in an hour definitely makes more sense than 60, but it would be ridiculous to say that we should devote resources into switching to it.
Final example—arithmetic in a dozenal (base-twelve) system is undeniably better than in decimal, but it would definitely not be worth the hassle to switch.
For similar reasons, I don't find the case for JPEG XL compelling. Yes, it's better in every metric, but when the difference comes down to a measly one or two megabytes compared to PNG and WEBP, most people really just don't care enough. That isn't to say that I think it's worthless, and I do think there are valid use cases, but I doubt it will unseat PNG on the Internet.
I’m not under the impression it would unseat PNG anytime soon, but “we have a current standard” isn’t a good argument against it. As images get higher and higher quality, it’s going to increase the total size of images. And we are going to hit a point where it matters.
This sounds so much like the misquoted “640K ought to be enough for anybody” that I honestly can’t take it seriously. There’s a reason new algorithms, formats and hardware are developed and released, because they improve upon the previous and generally improve things.
My argument is not "we have a current standard", it's "people don't give enough of a shit to change".
You're thinking in terms of the individual user with a handful of files.
When you look at it from a server point of view with tens of terabytes of images, or as a data center, the picture is very different.
Shaving 5 or 10% off of files is a huge deal. And that's not even taking into account the huge leap in quality.
Only thing I can think of is that PNG is inherently lossless. Whereas JPEG XL can be lossless or lossy.
I haven’t dug into the test data or methodology myself but I read a discussion thread recently (on Reddit - /r/jpegxl/comments/l9ta2u/how_does_lossless_jpegxl_compared_to_png) - across a 200+ image test suite, the lossless compression of PNG generates files that are 162% the size of those losslessly compressed with JPEG XL.
However I also know that some tools have bad performance compressing PNG, and no certainty that those weren’t used
Forgive my ignorance, but isn't this like complaining that a PlayStation 2 can't play PS5 games?
All the cool kids use .HEIF anyway
I use jpeg 2000
Isn't that the same as other newer formats though?
There's always something new, and if the new thing is better, adding/switching to it is the better move.
Or am I missing something about the other formats like webp?
You have to offer something compelling for everyone. Just coming out with yet another new standard™ isn’t enough. As pointed out earlier, we already have:
What’s the point of adding another encoder/decoder to the table when PNG and JPEG are still “good enough”?
PNG and JPEG aren’t good enough, to be honest. If you run a content heavy site, you can see something like a 30-70% decrease in bandwidth usage by using WebP.
You can't add new and better stuff while staying compatible with the old stuff. Especially not when your goal is compact files (or you'd just embed the old format).
Look it's all actually about re-encumberancing image file formats back into corporate controlled patented formats. If we would collectively just spend time and money and development resources expanding and improving PNG and gif formats that are no longer patent encumbered, we'd all live happily ever after.
Why was it not included? AVIF creator influence bias. It's a good story.
Google's handling of jxl makes a lot more sense after the jpegli announcement. It's apparent now that they declined to support jxl in favor of cloning many of jxl's features in a format they control.
Why wasn't PNG enough to replace jpeg?
PNG is a lossless format, and hence results in fairly large file sized compared to compressed formats, so they're solving different issues.
JPEG XL is capable of being either lossy or lossless, so it sorta replaces both JPEG and PNG
not enough elitists