Reducing PNG size in published output?

You are just a wealth of information MB, thanks for sharing this - someone asked me about this yesterday ;-)

Matthew, is there a problem with the way Storyline handles png files? I'm having a similar issue where png files I've inserted into a project are growing by about 75% when published. I'm still waiting to hear from support on that one.

Thanks for the tip Matthew!

Worked like a charm and took my image for 4.25mb to 500k.  

This is not a paid announcement.

Oh awesome! And they looked okay upon output?? About to go try it out!! This is why I looooove this community :) :) 

Y'all are the best!!!! This worked like a charm. Thank you :) 

And now I have a technical question about how published courses load the individual media elements: When we dropped the publish quality of the course, the size of the individual pngs/jpgs did not reduce but the overall package size did. What is actually being compressed during that lower quality publish? And how does it work when streaming courses? Does the course load the high quality image and then compress it in real time? I assumed they were being compressed upon output. 

Yeah I was shocked by how the quality of the PNGs was not reduced. I had done some futzing around in Photoshop, reducing them manually and seeing what they looked like and they looked terrible. So this was a much better solution. :) Thanks!

Okay further questions for you guys! 

1. Changing the output quality of a course doesn't seem to change the size of the individual image files within the mobile folder -- they remain the same size regardless of if I publish at 100% or 50%. What is actually being compressed in Storyline to lower the overall size of the zipped package?

2. On average, how big are the image files in your courses upon publish? 

Hi Ashley,

I see that you also posted here and Emily's helping you out! Our engineers are thinking it's a bug - so we'll keep you posted! 

Hi! Wondering if there was any update on this bug being fixed. Thanks!

Hi Ashley,

After digging a little deeper, we found that the image quality slider is designed to impact only JPEG/JPG files, so it won't affect PNG files. 

The reason you're seeing increased image sizes is because the resolution at which we publish PNG files has changed for the HTML5 player in Storyline 3 and Storyline 360. 

If you'd like to see an enhanced image quality slider that includes adjustments to PNG files, you're welcome to share your ideas with our product team here as a feature request!

I hope that clears things up, and let us know if you have further questions. ☺️

Anyone who uses a MAC to edit and compress images can try Compress, I have been using it for years and it's brilliant! It costs $5 a little less than Tinypng which is $50 for the full version.

This is not a paid announcement, just a recognition of decent software!

Thanks Matthew, I just tried it now and it's very good! Good options also in the preferences. Thanks for sharing! All the Best Vincent

Ah just noticing these updated comments! Yes, the image quality scale should apply to ALL IMAGES in a course. Why would it not???? Definitely submitting that as a feature since its illogical right now.

That's great Ashley, when I download and add images from the content library, they are very high quality (as you would expect!), it would be nice to have a compression option or DPI choice prior to inserting the image into a project. I had three quizzes (different grade levels) in one with about 100 background images which I wanted to load to a Moodle site, but the maximum allowed upload was 80 Mb and my project was 140 Mb, I ended up removing all the images and each quiz dropped to about 21m Mb. I'm learning the hard way!