this post was submitted on 26 Jul 2023
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No Stupid Questions

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I don't know what a .webp file is but I don't like it. They're like a filthy prank version of the image/gif you're looking for. They make you jump through all these hoops to find the original versions of the files that you can actually do anything with.

Edit: honestly I assumed it had something to do with Google protecting themselves from image piracy shit

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[–] DrQuint@lemmy.world 79 points 1 year ago* (last edited 1 year ago) (29 children)

You only dislike it because whatever bad app you're using to share them on doesn't support them.

Stop being the gullible fool and start hating the apps not the file format.

Edit: I also spot your .gif favouritism in there. .gif is an archaic and wasteful format, and asking for it is the same as looking at your car and whining that the fuel has no lead.

[–] twistedtxb@lemmy.ca 65 points 1 year ago (3 children)

The fact that GIF is still a thing in 2023 is baffling

[–] IanM32@lemmy.world 28 points 1 year ago

The terminology is sticking around longer than the format, too! Love me some (webm/H265) gifs.

[–] ram@lemmy.world 8 points 1 year ago* (last edited 1 year ago) (2 children)

The fact that GIF is still a thing in 2023 is baffling

As opposed to what widely supported animated image format?

[–] twistedtxb@lemmy.ca 19 points 1 year ago* (last edited 1 year ago) (1 children)

APNG, WebP, AVIF, WebM. Not sure about JpegXL

GIF is size and ressource heavy

[–] ram@lemmy.world 17 points 1 year ago (1 children)

Of all the formats you mentioned these are supported on popular platforms:

  • Twitter: gif
  • Discord: gif
  • Mastodon: gif
  • Reddit: gif, apng
  • Tumblr: gif, webp
  • Lemmy: gif, apng, webp

That's why gifs are still a thing.

[–] blujan@sopuli.xyz 11 points 1 year ago (3 children)

This is circular reasoning. They are wondering why gif is still a thing precisely because it's so supported while other formats that are better aren't and you are answering that it is because it's supported while other formats aren't.

[–] ram@lemmy.world 7 points 1 year ago* (last edited 1 year ago)

In that case the only people that can answer the question are the engineers from those platforms.

[–] Beliriel@lemmy.world 3 points 1 year ago* (last edited 1 year ago) (1 children)

Because it's old and easy to handle. Yes it's wasteful if you convert whole videos, but really anything under 10s with low rez is easily handleable by pretty much anything. Gif was the first animated format and that's why it's big. Also early internet forum days were absolutely plastered with pixelart gifs that ran for minutes and barely swalloed 100kb. You can get a lot of bang for your buck if you save on pixels and framerate. But ofc a 60fps render of some 4k bluray clip will eat your memory. Contrast that with 16×32 px gif that runs at 8fps.

[–] Aceticon@lemmy.world 3 points 1 year ago* (last edited 1 year ago)

GIF is big because it uses dictionary compression (pixel colors are mapped to a lookup table and then combinations of bits of increasing length are assigned to each table entry, the shortest combinations going for the most used colors, the longuest for the least used ones) which is great for stuff with clear (not-aliased) lines, a limited number of colors and large areas with just one flat color (such as drawings) but really bad for actual pictures (anything real world or imitating it, with natural shading).

I believe GIF still beats all or most other formats (except, for larger images, the actual vector graphics formats used in the programs with which such drawings are made nowadays) for things like drawings. (That said, I think PNG has a mode that does the same kind of compression, used for stuff like the little lemmy icon next to our nicknames here)

Animation on top if it was a bit of a hack due to the header format allowing multiple images in the same file, so it's really just a slideshow that has no video-oriented compression (i.e. each image is compressed individually and stored whole even if it's pretty much the last image with but a handful of pixels changed), hence why it's big when used for animation.

The kind of compression used in stuff like JPEG is based on the frequency of how each color channel changes across a block of pixels - which was 8x8 in the original JPEG - (i.e. it tries to match each block in the image to a sum of waves of different frequencies) which is much better for natural images, but loses information as a perfect match is usually impossible, and video compression methods have all sorts of intermediate frame compression techniques, the most basic of which is "this frame is the last frame with block such and such intact or moved around X pixels plus here's a bunch of entirelly new pixels" which usually is a lot better than compressing each image individually and storing it, not taking in account previous or subsequent images.

PS: I learned this stuff back at Uni, almost 3 decades ago, which shows you just how old this stuff is.

[–] bouh@lemmy.world -1 points 1 year ago

It's called an industry standard. We're using the same bolting in mechanic for ages. Only in computer science do things have to change every year...

[–] PeterPoopshit@sh.itjust.works 4 points 1 year ago (1 children)
[–] Matt_Shatt@lemmy.world 1 points 1 year ago (1 children)

Is that GIF as in GIF, or GIF as in GIF?

[–] Aceticon@lemmy.world 1 points 1 year ago* (last edited 1 year ago)

If I remember it correctly you can't rally beat a good dictionary encoding with wavelet compression for certain kinds of image such as drawings, cartoons and in general images with no or flat shading.

(Might be a bit outdated on that believe as I don't really know what compression algorithms are used in JPEG-XL or WebP)

Further, GIF is lossless compression, so that means your drawing compressed with it will be much smaller and after decompression you still have the same image exactly, pixel by pixel.

That said, most drawings nowadays being digitally created with vector drawing apps means that an even better format is whatever native vector graphics format used by the app as that can scale to whatever size you want.

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