I know this post is 2 years old, but I'm encountering the same issue.Were you able to resolve it? If so, could you please share the details?

Hello,We’ve encountered an issue with the existing custom workflow. Whenever we select the payload (page/assets) and trigger the workflow, the selected payload is not attached. We have to manually use the "Add Content" option to include the assets.Could someone confirm if this might be due to permis...

I have already updated Apache Sling MIME Type Service” before I raise this ticket. The issue is with adding the MIME type in Apache Jackrabbit Oak Blob Data Store. Do we update anything service. You have listed this one in your initial response.  

Thank you for your response. The issue is specific to the author instance, not the publish instance. I want to enable the preview of WebP images on an AEM 6.5 on-premise instance.

Thank you for the details. I have a few more questions. Could you please share your inputs on the following:I am unable to locate this configuration to register the MIME type for:Apache Jackrabbit Oak Blob Data StoreRegarding the generation of thumbnail images, I want to retain the original WebP for...

Please confirm if you're using AEM Cloud or AEM On-Prem version.

I'm not able to locate this config "Apache Jackrabbit Oak Blob Data Store". Can you share the screenshot?

I'm using AEM 6.5.22.0

Thanks for your reply. I have made changes only to the Mime Type configuration so far. Let me check the Oak Blob Data Store, as you suggested. Could you please explain more about the need to introduce a custom handler or override the existing DAM AssetProcessor service?

Hi,I have a requirement to enable previewing of WebP images (*.webp) in AEM On-Premise, specifically in the author instance. Essentially, when an image is uploaded, you should be able to see its preview. Currently, we’re unable to preview WebP images even though the WebP MIME type has been added to ...