The AMD Encoder plugin for OBS Studio enables AMD GPU owners to use their GPUs to encode H.264 and H.265 video directly. It leverages the AMF SDK (and in older versions a Media Codec SDK), which enables direct integration of AMDs video engine into other Software. At the peak of its lifetime, the AMD Encoder was integrated into OBS Studio and became part of its core toolset.
The project is now unmaintained and completely abandoned, after the de-facto only maintainer (me) left the project. This decision was made due to repeated disagreements with the OBS Project team and harassment from people affiliated with the OBS Project team.