Mirillis Action! allows streaming and real-time recording of your Windows desktop in HD video quality. With Mirillis Action! you can record and stream your game play, web player videos, record music, and capture screenshots. Mirillis Action! provides outstanding performance and GPU utilization which allows the smoothest real-time HD game play video recording. You can display current and average game frame rate (FPS) during game play and save your benchmark results. The application also offers high speed compression of your recorded content too.

Key features include:

Real-time game play and Windows desktop recording.
Hardware accelerated video exporting with NVIDIA NVENC, NVIDIA CUDA, and AMD APP.
Add live audio commentary to create high quality video tutorials.
HD video recording directly to MP4 format .
Live streaming game play and desktop to Twitch.tv, YouTube etc.
Overall, Mirillis Action! has a modern and sleek interface and it's quite easy to use. The application lets you record and upload your video to social networks and video sites and there are some really useful tools such as Time-shift and slow motion effects too. Also worth noting is the dual webcam video recording option; with this you can add up to 2 webcam streams to all your real-time game play and desktop recordings! The downside to the trial version, is that you have a watermark to contend with, apart from that Mirillis Action! really is a great application