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Action! - Gameplay Recording and Streaming News

Action! 5.0 with Scene Maker development progress

Hi everyone!

We are intensively working on Action 5 with Scene Maker. A sneak peek on work in progress below:



We have also updated Action to version 4.8.1 that includes a critical fix for live HDR preview. A recent update of Steam's gameoverlayrenderer.dll was causing Action to crash just after entering Preview with HDR10 encoder selected.

Other changes are listed below:
  • Added 240fps video capture (Use with caution! May not work on all system configurations and in HDR. Not recommended above 1080p)
  • Important fix for constant frame rate (CFR) recording/streaming when CPU/GPU loads are high
  • Further stability fixes/improvements for DirectX 10/11/12 capturing when Alt+Tab (entering/leaving fullscreen mode) is being used
  • Fixed wrong HDR detection after using Alt+Tab (entering/leaving fullscreen mode) in some situations
  • Added new 1440p and 2160p predefined video size profiles
  • Fixed application hanging after URL source enabling/disabling (using tick button or hotkey)
  • Fixed some URL sources not displaying properly


For those who are new to Action, you do not need to worry about corrupted MP4 recordings since Action is the only solution that can recover them even after system crash/BSODs or any other disaster (well maybe not after a meteor crash).

Take care and stay safe,
Mirillis Team

Action 4.7.0 with World's first JPEG XL screenshots capturing in HDR is ready!


Hi creators and gamers!

Today we bring you Action! v4.7.0 with another World's first: JPEG XL true HDR10 screenshots capturing!
From now on not only you can create great looking HDR10 videos using Intel, Nvidia or AMD GPUs but also be ready for the future of amazing HDR still image creation!
The web browsers like Chrome, Edge and others with JPEG XL (JXL) support are only a few steps away and with Action! 4.7.0 you will be ready and ahead of the others.

Let us explain how it works in a few simple and easy steps:
  • Action! automatically detects HDR video content
  • When you push create screenshot hotkey (default F12) when HDR video is visible on your screen two screenshots are made at the same time. One is an SDR tone mapped screenshot (BMP, PNG or normal JPEG) and the other a true HDR10 JPEG XL (JXL extension) still image
  • To view it just go to the screenshots tab and the HDR screenshot will there waiting for you with a small icon on it telling that it is the HDR one
  • Double click it and our free JPEG XL HDR10 viewer will display the screenshot in true HDR colors! (HDR display is needed of course)
  • You can share the screenshots along with the viewer to anybody (just send the jxlcodec_view.exe and jxlcodec.dll files that are located in your Action!'s Steam installation folder)
  • The viewer can be assigned in Windows to open any JXL files by default
  • A more advanced standalone application for JPEG XL viewing will be available from us for free soon!


We are very excited that we can enter this wonderful HDR future with you!

And as a bonus soon with Action! you will be able to create panoramic 360 HDR still images from ANY First Point Of View game! Sounds amazing, doesn't it?

Below a list of other improvements in version 4.7.0 (and also 4.5.0 and 4.6.0):
  • Microphone volume boost to 200% level is now possible
  • HUD is now rendered in true HDR for HDR desktop and HDR games using 64 bits per pixel color
  • Fixed Alt+Tab crashing in some DirectX 10/11 games and applications
  • Improved ST.2084/BT.2020 HDR10 video signaling
  • Fixed randomly corrupted (green) recordings using hardware accelerated HEVC encoding on Nvidia GPUs
  • Fixed maximum allowed AMD AMF (VCE 1.0 to 4.1) video encoder resolution

  • Fixed active screen switching (on accounts without administrator rights)
  • Fixed desktop capture on multi-GPU systems (on accounts without administrator rights)
  • Fixed cursor position when recording regions on multiple desktops (other than primary)
  • Fixed desktop capture when non-native resolution with non-native aspect ratio is selected
  • Fixed Vulkan HUD not refreshing when recording/streaming is started
  • Fixed support for very long streamkeys (used by Booyah live streaming service)
  • Fixed not detecting specific applications as active
  • Reduced minimum streaming bitrate value for 60fps
  • OpenGL capture fixes


Mirillis Team

Action 4.4.0 with Doom Eternal HDR10 recording support is ready!



Hi creators and gamers!

Yesterday we have uploaded version 4.4.0 with the following changes:
  • HOTFIX: Fixed Doom Eternal recording in Vulkan HDR10 mode (AMD GPUs currently don't support HDR in Doom Eternal but AMD is working on it)
  • HOTFIX: Improved OpenGL support on notebooks with two GPUs (integrated and high performance)
  • HOTFIX: Improved Minecraft (Java edition) support (still HUD is wrongly displayed in some views since Minecraft Java Edition version 1.13)
  • Fixed compatibility with Intel GPUs when old drivers are installed or GPU does not support NV12 format
  • Reduced number of requests to YouTube API services
  • Live viewers count is disabled by default


Please remember to select the hardware acceleration with "HDR10" in name for HDR recording.
You can also record HDR10 video using the Intel GPU (UHD graphics or Iris) on laptops with integrated and discrete GPUs even if the discrete GPU does not support it!

Stay safe, stay sane and create great looking Standard and High Dynamic Range HD and 4K content!

Mirillis Team

Action 4.3.1 with important fixes is available.

Hi everyone,

We have just uploaded version 4.3.1 with important fixes listed below:

  • HOTFIX: Fixed problems with GPUs not fully supporting DirectX 11.1 features (GPUs designed before Windows 8.1 introduction like Nvidia GTX 6xx, GT 7xx etc.)
  • Improved Vulkan performance
  • Fixed region recording using Intel GPUs
  • Fixed desktop recording when Windows 10 virtual scaling is enabled (desktop resolution is not monitor's native resolution)
  • Fixed pause when no audio is recorded or no audio devices are present in the system (video only)
  • Added YouTube permissions revocation after logging out in account manager
  • Added Discord to built-in exclude list


IMPORTANT: Due to the coronavirus outbreak we have problems with the YouTube API Services as we are running out of quota during the day (because of the large number of users). We are working to increase our daily limits. The only fix to this problem right now it to use the URL/Streamkey (Custom streaming method).

Mirillis Team

Action 4.2.0 with HDR10 and tons of other improvements is ready!



Hi everybody!

For the past month we have been struggling to improve all the issues reported by our dear users. We have integrated NVIDIA NVAPI and AMD AGS API to detect if HDR is enabled at the GPUs output (HDMI and Display Port). We also had to implement missing Windows 10 functionality since there is no official way to detect if HDR (ST2084 gamma) is enabled at the output of fullscreen exclusive DirectX 12 games and apps that do not use NVAPI or AMD AGS API. There was a serious bug for games that run in RGB10 format that sometimes were incorrectly detected as HDR and the captured video was corrupted (psychedelic color effect).

As of version 4.2.0 we support HDR10 recording for newest AMD Vega GPUs and real-time preview in HDR.

Below a list of all important improvements included in this version:
  • NEW: Real-time preview in HDR10!
  • NEW: HDR10 recording/capture now available on newest AMD Vega GPUs!
  • Automatic switching to SDR encoder when first video frame is not in HDR
  • Fixed problems with detecting HDR video (integration with NVIDIA NVAPI and ADM AGS API for HDR output detection)
  • Fixed corrupted video colors by incorrectly detecting RGB10 SDR video as HDR
  • Fixed ST2048/BT2020 gamma detection in DirectX 12 by implementing undocumented/missing Windows 10 functionality
  • Improved HDR10 video quality
  • Fixed problems with performance on AMD RX 5700 and other new AMD GPUs (SDR encoders for all GPU vendors now work in NV12 format)
  • Fixed problems with Alt-Tab in DirectX 12
  • Added system sound volume boost to 200% (fixes too quiet audio recording)
  • Fixed Constant Frame Rate marking in 120p/144p MP4 files (for video editors)
  • Improved AV lip-sync in low framerate modes (ie. 24p)


Thank you for your continuous support and feedback!

Mirillis Team