This blogpost is continuation of Wowza powered by M3 and G2 instances on AWS.
GPU is absolutely awesome piece of engineering. It extremely speed up computation which can be parallelized. Media transformation is that case. If we need to transcode any LIVE stream into multiple formats we should definitely use the power of GPU as much as possible.
Fortunately, AWS provides instances with Nvidia GPU installed (it requires some manual installation of drivers for your specific OS). Also Wowza requires some tuning of transcoder to enable GPU support. I will not focus on installation and configuration itself. If you need some help please jump to the "resources" list at end of this blogpost. However to enable GPU you can update configuration over WEB interface using "Wowza Streaming Engine Manager" or at '/usr/local/WowzaStreamingEngine/transcoder/templates/transrate.xml'.