Known Participant

Question

What the... an animated JPG?

Forum|Forum|15 years ago
May 11, 2010
7 replies
162801 views

The following image is being spread across Facebook for its comedic value... when I saw it in my newsfeed, I didn't think much of it.

Then I noticed that according to its extension, it's a JPG, not a GIF.

An animated JPG?! I've never seen one before. Am I just out of the loop, or is there sorcery involved here?

This topic has been closed for replies.

A

Anonymous

I came across this:
https://steamcdn-a.akamaihd.net/steam/apps/391220/extras/ROTTR_AimGreater_30.jpg?t=1540399490

The quality is almost movie-like. No graininess, smooth playback, and jpg. If I try to save it to my desktop I only get the first frame and it's 9MB jpg.

However, firefox says the image is gif, but jpg extension.

How do to this? How to make such good quality gifs? Why did they turn it into jpg? Is it faster to load? How to turn gif into jpg extension?

try67

Community Expert

It's just a high quality gif file saved with the jpg extension... The browser identifies it as an animated gif (probably based on the header) and presents it as such. There's absolutely no benefit in doing it. In fact, it's just confusing and might cause it not to work in some environments, if the file extension is what's used to identify the file type.

A

Anonymous

I managed to replicate the same quality, https://image.ibb.co/gCorkV/tr3.gif but I don't know how to save it with jpg extension. It's bugging the hell out of me

I have one weird use case for such scenario

H

hygienefan883

Participant

This was a very helpful thread. I came looking for what an animated jpeg was, and to my surprise and delight, found a passive-aggressive rant about how the internet has changed since 1992.

Keep on surfin' the information superhighway!

the_wine_snob

Inspiring

found a passive-aggressive rant about how the internet has changed since 1992.

Yes, sometimes that happens, but usually not around this forum. Things are normally very laid-back and, if not friendly, at least neurtal. Still, every now and then...

Keep on surfing...

Hunt

A

Anonymous

That's a GIF file, renamed as JPG.

See post #15 above. Use Firefox to examine graphics like this.

M

MollyMae20

Participant

Great, thank you!

raven+crow

Known Participant

Wait, does it not work because something else is going on there or because FB repsonded SUPER-quickly to Marian's report?

Also, 100% have to disagree with you, Marian—animated GIFs are awesome, waste of resources or no, especially given the steady increase in average bandwidth for users wordwide. Kids are doing crazily creative things with them too. Just look at how awesome this is—http://kindness.ravenandcrowstudio.com/2011/06/journal-of-movement-of-world_24.html

A

Anonymous

I don't think we are in disagreement. I'm not dismissing animated GIFs. I'm pointing out an abuse of the GIF format for video.

You've linked to an animated GIF that is not video and it is smaller in size than that video of the bird walking.

And don't think an increase of bandwidth means we can act recklessly by posting 8 MB video GIF files online. There is always a distribution cost. If there were no such cost for delivery, YouTube, Hulu and Netflix would be serving you uncompressed video. The host for the very first example in this discussion has yanked the recklessly large image file.

raven+crow

Known Participant

Ah, you're correct—I was indeed running on the assumption that you were anti-animated-GIFs of any sort. And point taken on files that large, in general, though I wonder if you could expand a bit on your statements on distribution costs and the posting of such files being reckless.

M

MacAdop

Participant

So how can we make a jpg like this(http://i40.tinypic.com/ilkaps.jpg)

Can anybody, who know this answer, explain the solition clearly. Because my english is not good and difficulty in understanding your writings.

A

Anonymous

Create an animated GIF file
Save it
Rename it from .GIF to .JPG

That is all that has been done here.

We're still looking at a GIF file. It has simply been mis-named as a JPG file.

...and the file is still too large for a web page ...the creator should be shot, then drawn and quartered. GIF was never meant for video. Use a real video format.

E

emmachinedu

Participant

what do you say about this

https://fbcdn-photos-a.akamaihd.net/hphotos-ak-snc3/29301_442976909814_310716489814_5773694_3162803_s.jpg

A

Anonymous

mjyeager wrote:
The following image...

There was no image related to this post.

JPG does not animate.

You either saw a series of JPG images rendered with javascript or you saw a GIF file named as a JPG. A web server and browser might still recognize the correct GIF filetype, even if the wrong extension has been added to the filename.

A

Anonymous

Marian Driscoll wrote:
JPG does not animate.

Not sure what you definition of animate is. I take a bunch of jpg files, load into stack, make frames from layers, and I have an animated clip. With this defination of animation you should be able to use any file type.

A

Anonymous

Curt Y wrote:
Marian Driscoll wrote:
JPG does not animate.
Not sure what you definition of animate is. I take a bunch of jpg files, load into stack, make frames from layers, and I have an animated clip. With this defination of animation you should be able to use any file type.

My (and everyone else's) definition of 'animate' does not include a single JPG file, as described by the OP.

'an animated JPG' does not equal 'a bunch of JPG files'.

A

Anonymous

There is no rule that says you have to use GIF for animation. I use jpg rather than convert to gif.

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