The feature in question has been requested at Can we hotlink ODK Central media files? and it will arrive eventually. Alternatively, there's an option described in Accessing images on PowerBI - #4 by LN to mirror media files elsewhere using the attachments API and prepend those urls to your media filename when you build the dashboard.
Please note that Aggregate is no longer being supported. Central is now the ODK server. The post below has for more details about the end-of-life for Aggregate.
In accordance with the plans announced at Upcoming changes to Aggregate , the core team is no longer updating Aggregate. We will not fix bugs, add features, review PRs, improve documentation, release new versions, or answer support questions.
We've been communicating this reality to users over the last two years through the documentation , code repo , and in community announcements.
The core team (and the @TAB ) believe that Central is production ready and better than Aggregate for most users, so …
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