Mirillis Action! is a screen recording and live streaming software for Windows. It[SQ]s known for its ability to capture high-quality video and audio from your screen, games, and webcam, with relatively low system impact. Key features include :

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Screen Recording:

Capture your entire screen, a specific window, or a selected region. It can record gameplay at high frame rates and resolutions.
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Live Streaming:

Stream your gameplay or screen activity to popular platforms like Twitch, YouTube, and Facebook.
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Game Recording Optimization:

It[SQ]s designed to minimize performance impact while recording games, making it a popular choice among gamers.
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Webcam Overlay:

Integrate your webcam feed into your recordings or streams.
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Audio Capture:

Record audio from various sources, including your microphone, system audio, and other applications.
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Video Editing:

Basic video editing tools are included to allow trimming and simple enhancements to your recordings.
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Hardware Acceleration:

Leverages your graphics card to improve performance, especially when capturing high-resolution content.
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Customizable Hotkeys:

Allows users to start and stop recordings, stream, and perform other actions with custom keyboard shortcuts.

Essentially, it[SQ]s an all-in-one solution for recording and broadcasting your computer screen activity, focusing particularly on providing a user-friendly experience for gamers and content creators. However, it[SQ]s a commercial product and requires a purchase to unlock all its features.