alpha channel graphics possible in Storyline 2?

Jan 12, 2017

I have a video composition that has been keyed to take out the background. It's been saved as an mp4 and mov that allows for alpha channels. 

When I bring that video into Storyline2 I see a black rectangle.

Does Storyline support alpha channels? If so, can someone suggest a best practice to achieve what I'm trying to do?

9 Replies
Alyssa Gomez

Hi there Lawrence,

FLV videos with alpha channel transparency are supported in Articulate Storyline's Flash and Articulate Mobile Player (AMP) output. There was an issue in earlier builds of Storyline where alpha channel transparency wasn't working as expected in published courses, but it has since been corrected. Can you confirm that you are on the latest update of Storyline? Also, keep in mind that this will not work in the HTML5 output.

If you are still having difficulty and need us to take a look at your .story file, you can share your file here with our team.

Pete C

Hey there Alyssa.

Have there been any updates/improvements with this particular dilemma since your response 6 mos ago? The Flash player continues to fade further and further from existence and your last response is a copy and paste of a response from two years ago when this same issue first began to rear it's ugly head.

Does SL plan to address the death of Flash in newer versions of the software? I know I'm already a version or two behind (Storyline 2).

Thank you.


Ashley Terwilliger-Pollard

HI Pete, 

With the release of Storyline 3 and Storyline 360 (part of the Articulate 360 suite) we made a lot of improvements within the HTML5 output knowing the issues that Flash has caused over the last couple of years. 

You'll now see that Storyline previews in HTML5, and you can choose to publish with HTML5 only or first output and still have flash as a fallback. You may want to take a look at our updated comparison chart of HTML5, Flash and AMP here.

The other big improvement was the changes made around mobile viewing, and the responsive player that we created for Storyline 3/360 and Studio 360 output. Take a look at the information here.  

With this, we still haven't changed the way videos are encoded - so if you're inserting an FLV or SWF video, those will f ollow the same set up as shown here based on the output. 

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