AEM Asset Changing the Assets backgroud into different color Issue

[#1]

Hi Experts,

We have uploaded few asset for example below in to AEM Assets with background color white. But after uploading the assets AEM converted into black background.

Original Assets:

After uploading in to AEM Assets it looks like:

Can you help us to understand why it is happening? and also which preview server AEM is using  to generate the preview of asset?

Thanks

Samer

[#2]

Can you please help us reproduce this? Which AEM version are you on?

Is this happening for all Assets or few?

Reference Read:- Apply image presets or dynamic renditions

Link:- http://www.tothenew.com/blog/exploration-of-aem-dam/

// Custom Renditions

Access the DAM update asset model from the workflow console (classic UI view steps listed below)

Access http://<host>:<port>/libs/cq/workflow/content/console.html

• In the Models tab, double click on “DAM update asset” workflow.
• Double click to edit the 14th workstep Processing Thumbnails. In the dialog box we can see under thumbnails tab some default resolution configurations in a multi-field, to which we can add or remove our custom resolution configuration too.
• After adding the custom resolution, Click OK and save the workflow from top left and close the workflow console.
• The custom rendition of the resolution that we added will now be generated for every asset that is uploaded in DAM.

[#3]

Hi Kautuk,

We are using AEM Asset 6.4 version and it was happening only for few asset. It might be because the dynamic media was not enabled.

Thanks

Samer