GC553
Live Gamer ULTRA
OS：Win10 x64, Win 11
Description：
1. Kick CDN Support: Integrated support for Kick streaming.
2. Audio Monitoring: Enabled by default for all capture devices.
3. AV1 & NVIDIA Super Resolution: Now supported for recording and streaming.
Supported Models: GC553G2, GC575, GC573, GC553Pro, GC551G2.
4. New Aspect Ratios: Added support for 21:9 ultra-wide recording and portrait (9:16) streaming.
5. HEVC Encoder Support:
SDR → YouTube
HDR → YouTube / RTMP
6. Bug Fixes:
Resolved crashes during Alt+Tab switching and Snapshot usage.
Fixed blurry visuals when capturing Discord.
7. Optimized startup to prevent occasional black screens and audio anomalies.
See the new features in action：
OS : macOS 15, macOS 26
Description:
1. Added support for German, Spanish, Russian, French, Korean, and Thai interface languages.
2. Fixed an issue where some devices weren’t being detected or were showing up incorrectly.
3. Fixed an issue on macOS where GC313Pro couldn’t retrieve firmware version information correctly.
OS : Win10 x64,Win 11
Description:
1. Added support for German, Spanish, Russian, French, Korean, and Thai interface languages.
2. Added PCIe information display to the GC573 settings page.
3. Fixed an issue where some devices weren’t being detected or were showing up incorrectly.
4. Fixed a rare issue where GC553G2 and GC575 lights couldn’t be controlled through Assist Central Pro on certain PCs.
OS：Win10 x64, Win 11
Description：
New Features
1.Added support for zoom, screenshot, and full-screen preview for more flexible operation.
2.Added hotkey function to start streaming or quickly perform common actions with hotkey.
3.Added stream quality display and detailed streaming platform settings, including privacy options, for more precise control over streaming status.
4.Added HDR brightness adjustment for more refined image colors.
5.Added VSync toggle for a smoother viewing experience.
UI and Stability Improvements
Optimized UI interface, and improved audio monitoring function and overall stability.
See the new features in action：
Version: Assist Central Pro v4.0.73
OS : macOS 14, macOS 15
Description:
1. Support for EDID Merge, Copy, and Internal mode changes has been added for the following models:
GC515, GC553G2, GC553Pro, GC575, GC571, GC573, GC570D
Support for EDID Merge and Internal mode changes has been added for GC551G2 (requires firmware ver. 1.2.6.1)
*Note: For more information on EDID modes, refer to this FAQ
2. Fixed issue: When Nitendo Switch 2 was set to 1440p60 and when GC551G2 passthrough was connected to certain monitors, Assist Central Pro displayed incorrect input resolution.
OS : Win10 x64,Win 11
Description:
1. Support for EDID Merge, Copy, and Internal mode changes has been added for the following models:
GC515, GC553G2, GC553Pro, GC575, GC571, GC573, GC570D
Support for EDID Merge and Internal mode changes has been added for GC551G2 (requires firmware ver. 1.2.6.1)
*Note: For more information on EDID modes, refer to this FAQ
2. Fixed issue: When Nitendo Switch 2 was set to 1440p60 and when GC551G2 passthrough was connected to certain monitors, Assist Central Pro displayed incorrect input resolution.
OS: macOS 13.x & macOS 14.x
Description:
1.Fixed instability issues with specific DSLR inputs
2.Fixed MAC system device re-plugging affecting GC553 video feed
OS: Win10 x64, Win11 x64
Description:
Fixed instability issues with specific DSLR inputs
Note: If your GC553 is not recognized during the firmware update process, you can try running this tool to see if it can recover the device.
OS: macOS 13.x & macOS 14.x
Description: Optimize some compatibility issues with some DSLRs (Video processing)
OS: Win10 x64, Win11 x64
Description:
1. Optimize some compatibility issues with some DSLRs (Video processing)
2. After a firmware update failure on the GC553, unplugging and replugging the GC553 and rerunning this version of the firmware update tool can fix the update failure issue
OS macOS 12.x & macOS 13.x
Description
1 Support macOS 13.x
2 Modified for UVC auto select correct framerate.(update default Frame Interval)
- Version：StreamEngine v2.0.0.36
- OS：Win10 x64
- Description：
Modified localized strings.
Modified device name.
- Version：v1.3.5.0
- Betriebssystem：Win10 x64
- Beschreibung：
1.Improved video latency
2.Fixed some bugs with Utility tool.
3.Added HDCP and audio sample rate states report.
4.Fixed change resolution maybe show "No Signal" image.
- Version：[Application] RECentral: v4.3.0.34 (Beta)
- Betriebssystem：Win10 x64
- Beschreibung：
1. Fix an issue that cannot stream to Facebook.
2. Fix an issue that cannot stream to Twitch.
3. Add privacy permission detection mechanism.
4. Fix some microphone compatibility issues.
5. Increase maximum mp4 file size.
6. Fix some minor issues.
- Version：[Application] RECentral: v4.3.0.14
- Betriebssystem：Win 10 x64
- Beschreibung：
1. Support "always on top" mode.
2. Remove "tridef smart cam" background removal function.
3. Show USB controller info in setting page.
4. Shorten the transition time between scenes.
5. Improve the performance of recording when uses NVIDIA GPU encoder.
6. Fixed an issue that cannot upload an image with "png" format to twitter.
7. Support ESC/Delete hotkey on the keyboard.
8. Fixed wrong description of HDCP detection.
9. Fixed some minor issues.