URLs are handled by the video subsystem, but image loading should work as well.

[hzeller]

The AV subsystem can load content from URLs, however, we should have this functionality in general to download content.

In the simplest case, we can re-use the network handling in the AV libraries if they are somewhat exposed in the API.

Storing in a a tmp file, opening it and handing file-descriptors around to image and video subsystem to easily rewind and read from there could then be the next step.