Trying to create a new EMB file from JPG

Hello Team,

I am using Wilcom Web API for the first time and went through all the documentation you have for WEB API implementations. I am trying to create an EMB file from a Base64 JPG file. In the documentation, it is said that Base64 JPG input is valid, but when I am trying to implement the same I am getting the following error both from SandBox and the Live.
Errorcode="103" Message="The input formats are not supported: JPG" - Please see the attachment for the same

Below is RequestXML I am using for the same:

<xml>
<recipe>
<decorations>
<design file="test.JPG" />
</decorations>
<output design_file="Tests.emb"
trueview_file="Tests.png" />
</recipe>
<files>
<file filename="test.JPG" filecontents=""<Base64 encoded file content>"/>
</files>
</xml>


In the above code snippet, I am using the actual base64 content instead of <Base64 encoded file content>

Any help would be really appreciated. Thank you in advance.

Thanks,
Sudheer