C# Tell static GIFs apart from animated ones

Question

I'll keep it short and simple;

is there any way of telling static GIF images apart from animated ones? I'm using C#.

Thanks

score 28 · Accepted Answer · edited May 17 '10 at 11:54

28

Here's an article about how to determine the number of frames in a GIF animation.

Image i = Image.FromFile(Server.MapPath("AnimatedGIF.gif"));

Imaging.FrameDimension FrameDimensions = 
    new Imaging.FrameDimension(i.FrameDimensionsList[0]);

int frames = i.GetFrameCount(FrameDimensions);

if (frames > 1) 
    Response.Write("Image is an animated GIF with " + frames + " frames");
else 
    Response.Write("Image is not an animated GIF.");

And I assume you could just compare that with 1.

edited May 17 '10 at 11:54

Jeff Atwood

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answered May 17 '10 at 11:46

David Hedlund

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2

+1 Hardcore article in a tiny font! Could you paste a snippet of the code here and link to the article as well? So that if the page or site gets deleted the answer is not lost. – amelvin May 17 '10 at 11:57
@amelvin: good idea. i see jeff has already done it, now =) @jeff atwood: props for changing the variable names to convention! – David Hedlund May 17 '10 at 12:43
3

Thanks for adding the code here, the website is no longer available. – flayn Jun 05 '12 at 10:09
1

If your objective is to detect animation then answer from deadpixel is the cleaner approach. – Rahatur Dec 05 '17 at 23:26

score 6 · Answer 2 · answered Mar 17 '16 at 14:53

System.Drawing.ImageAnimator.CanAnimate has been available since .NET 1.1.

From MSDN:

Returns a Boolean value indicating whether the specified image contains time-based frames.

Example:

using (Image image = Image.FromFile("somefile.gif"))
{
    if (ImageAnimator.CanAnimate(image))
    {
        // GIF is animated
    }
    else
    {
        // GIF is not animated
    }
}

C# Tell static GIFs apart from animated ones

2 Answers2