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jyeager11
Known Participant
May 11, 2010
Question

What the... an animated JPG?

  • 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.

    7 replies

    A
    Anonymous
    November 22, 2018

    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?

    Silkrooster
    Silkrooster
    Legend
    November 23, 2018

    ColorByt  wrote

    I came across this:
    https://steamcdn-a.akamaihd.net/steam/apps/391220/extras/ROTTR_AimGreater_30.jpg?t=1540399 490

    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?

    The reason it does not play is due to the type. Most browser reply on the MIME type to determine what to do with the file especially if it does not have or has an incorrect file extension. Changing the extension then has no effect on those browsers. However there are a few browsers that do rely on the file extension and changing it would break the correct player to use.

    That said, years ago, there was a plan to have an animated jpg. As the gif format was and still is outdated. I almost think there was a plan with the png format as well. But apparently it never went very far. Otherwise it would have replaced gif by now.

    However if you really want to fake it, you could create a small javascript file rotator app which preloads a sequence of jpgs then plays them. But that may be out of scope of this thread.

    H
    hygienefan883
    Participant
    October 8, 2011

    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
    the_wine_snob
    Inspiring
    October 9, 2011

    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
    September 12, 2011

    That's a GIF file, renamed as JPG.

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

    M
    MollyMae20
    Participant
    September 12, 2011

    Great, thank you!

    raven+crow
    raven+crow
    Known Participant
    August 9, 2011

    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
    August 9, 2011

    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
    raven+crow
    Known Participant
    August 9, 2011

    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
    May 14, 2010

    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
    May 14, 2010
    1. Create an animated GIF file
    2. Save it
    3. 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
      August 9, 2011

      what do you say about this

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

      A
      Anonymous
      May 11, 2010

      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.

        J
        jyeager11Author
        Known Participant
        May 11, 2010

        Marian Driscoll wrote:

        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.

        Sorry, forgot the link.

        http://i40.tinypic.com/ilkaps.jpg

        What the heck is it?

        A
        Anonymous
        May 11, 2010

        That is a GIF file, renamed as a JPG file. Web browsers are smarter than the guy/gal that misnamed that file... and will display the image even with the wrong extension.

          A
          Anonymous
          May 11, 2010

          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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