Bug report: black border appears on gif/png image

Jun 30, 2013

I noticed this thing several times: if i use a png/gif picture with a white background, when previewing or publishing it is displayed with a black thin border/artifact on the bottom side.

7 Replies
Justin Grenier

Good Afternoon Zio, and thanks for taking the time to report this behavior!

A quick Google search for images with white backgrounds results in this .png image and this .gif image.  When I insert them into a .story project file, I'm not seeing any unexpected black borders in the resulting published output.

If you can reproduce this with a specific PNG/GIF image, would you mind sending it to us as part of a Support Case so that we can take a closer look?  Thanks!

Justin Grenier

Hi, Zio.

I'm no Graphic Designer, but it appears that 8-bit PNG images are hard to come by, and here is the first one I found via a Google Image Search (please excuse the silliness).

Here is the resulting .story project file, and here are the published results.  Again, no unexpected black borders.

I certainly believe that you are experiencing the problem, but I just can't reproduce it with an independent image.  To this end, I'd like to ask that you send us one of your images so that we can take a closer look.  Thanks!

Steve Smart

Hi -

Just to say I've experienced the same problem with png files.  I have a screengrab widget which must save to png8 I guess, as I notice the problem when using the widget's output.  Here's an example - if I drop this into Storyline, the iPad player version has a faint hairline around it - both preview and desktop web based version seem ok. 

...interestingly, I notice that the image above has a grey hairline also.  I checked the file Photoshop - it is an 8bit png, and white all the way to the edge. I converted it to a 16bit png, resaved, reimported to Storyline, republished, and the irksome hairline in the iPad player version went away.  

So looks like you're both right - perhaps a problem with the output of 8bit pngs to ipad player?



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