KVM
Video Streaming & Quality
Video capture in USBridge relies on the standard UVC (USB Video Class) protocol, ensuring complete independence from the target host operating system.
Connection and Hardware Path
USBridge utilizes the USB-C (Host) interface for video capture via the included HDMI-to-USB UVC dongle. If simultaneous video capture and wired USB-LAN emulation are required for your deployment, both modules must be routed through an external USB hub connected to the appliance.
Resolution and Signal Parameters
The capture architecture is optimized for absolute stability in pre-OS environments, including BIOS, UEFI, and bootloader screens.
- Guaranteed Baseline: 800x600 @ 60 FPS. The included capture adapter enforces this mode to maintain ultra-low latency and predictable behavior within terminal-style interfaces.
- Maximum Input: Up to 1080p60 (hardware-dependent based on the specific capture dongle used).
- Streaming Output: Typically delivers up to 1080p30, dynamically scaling based on available network bandwidth and selected client encoder settings.
- 4K Constraints: 4K input falls outside the target pre-OS use case and is strictly unsupported by the core architecture.
Latency Optimization
Glass-to-glass latency is directly tied to the network connection method between the client and the USBridge appliance. You can expect approximately 80–150 ms of latency over a wired LAN connection, and 120–250 ms when operating over a standard Wi-Fi network.
Image Output Characteristics
EDID and Dummy Plugs: EDID behavior is governed by the capture module. If the target host motherboard disables its video output when no physical monitor is detected, an HDMI dummy plug (EDID emulator) is required to force the signal.
Local Monitor Loop-Out: HDMI loop-out is not natively present in the standard hardware revision. To output video to a local crash cart monitor simultaneously, introduce an external HDMI splitter or utilize a secondary video port on the target server.
Content Limitations: High-bandwidth Digital Content Protection (HDCP) and Digital Rights Management (DRM) are not supported. Protected content will output a black screen. HDMI audio transport is also disabled by design.