Captions causing very slow initial load

Jan 18, 2021

Hi,

We have a course developed in storyline that has audio on each slide, along with captions. When loading the file in the browser / via an LMS the initial load is very slow, after inspecting the network tab we noticed 100+ requests to *_captions.js files, and course won't begin until all the files have completed loading.

Has anyone run into this? and is there a solution to prevent storyline from pre-loading all of these files and instead load them when needed?

Thanks!

Introduction_to_Emotional_Intelligence_-_STAC_Sandbox.png

5 Replies

Ren Gomez
Staff

over 3 years ago01/22/21 at 6:48 pm (UTC)

Hi Ian,

Thanks for reaching out and sharing that image of what you're seeing in the output! Do you have anything out of the ordinary, such as Javascript, in your slides?

Caption.js files don't usually get generated, so if you're able to share your file with our team, we can dig in and figure out what is happening here!

Share your file with us.

Ian Taylor
Author

over 3 years ago01/31/21 at 9:57 pm (UTC)

Hi Ren,

Thanks for the response and sorry for the delay.

The course doesn't have any out of the ordinary Javascript. I have included a simple .story file with 2 slides which have captions enabled, publishing this file for the web will generate 2 *_captions.js files which are loaded during the initial load.

We ended up developing a script that combines all the caption files into a single file which means we only need to wait for 1 file to load vs 100+ for our large course. This brought the course from taking ~60 seconds to load down to ~10 seconds.

captions.story

Ren Gomez
Staff

over 3 years ago02/04/21 at 4:55 pm (UTC)

Hi Ian,

Thanks for following up and sharing how you figured it out! 60 seconds to 10 seconds is a great improvement.

If you're able to share the script for other members that come across this issue, I'm sure it'll be of huge help!

19 days ago05/14/24 at 3:55 pm (UTC)

Hi @Ian,

Just ran into this issue today with a client's SCORM. Would you be able to share your solution?

I see in a parallel post (Course taking forever to load because of captions) that another user also suggested updating the "LMS server from HTTP/1.1* to HTTP/2" because "it's much faster for multiple small files"

Also @RenGomez - it looks like a user in yet another parallel post (Is there any way to tell an LMS to NOT load all resources (images, videos etc) in the beginning?) asked about not pre-loading all resources on launch of the SCORM. Is this a possibility as well?

Thanks for any info you all have!

17 days ago05/16/24 at 9:06 pm (UTC)

Hello Clinton!

I am not sure if Ian is still subscribed to this discussion to offer a solution on upgrading the LMS server.

As of now, I haven't heard of a way to not preload all resources when launching the SCORM package but someone in the community might have a way to manipulate this! You can also reach out to our Support Engineers in a support case if you need help troubleshooting this in Storyline!