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

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