There is an updated pull request by stenstorp against master on the void-packages repository

https://github.com/stenstorp/void-packages live555
https://github.com/void-linux/void-packages/pull/11454

live555: Update to version 2019.05.03
Version 2019.02.03 no longer available. Update to 2019.05.03.

A patch file from https://github.com/void-linux/void-packages/pull/11454.patch is attached