Emergent Vision Technologies (EVT)

Holoscan 1.0.3

Thanks to a collaboration with Emergent Vision Technologies, the Holoscan SDK now supports EVT high-speed cameras.


The addition of an EVT camera to the Holoscan Developer Kits is optional. The Holoscan SDK has an application that can be run with the EVT camera, but there are other applications that can be run without EVT camera.

The EVT cameras can be connected to Holoscan Developer Kits though Mellanox ConnectX SmartNIC, with the most simple connection method being a single cable between a camera and the devkit. For 25 GigE cameras that use the SFP28 interface, this can be achieved by using SFP28 cable with QSFP28 to SFP28 adaptor.


The Holoscan SDK application has been tested using a SFP28 copper cable of 2M or less. Longer copper cables or optical cables and optical modules can be used but these have not been tested as a part of this development.

Refer to the NVIDIA IGX Orin Developer Kit User Guide for the location of the QSFP28 connector on the device.

For EVT camera setup, refer to Hardware Installation in EVT Camera User’s Manual. Users need to log in to find be able to download Camera User’s Manual.


The EVT cameras require the user to buy the lens. Based on the application of camera, the lens can be bought from any online store.

The Emergent SDK needs to be installed in order to compile and run the Clara Holoscan applications with EVT camera. The latest tested version of the Emergent SDK is eSDK 2.37.05 Linux Ubuntu 20.04.04 Kernel 5.10.65 JP 5.0 HP and can be downloaded from here. The Emergent SDK comes with headers, libraries and examples. To install the SDK refer to the Software Installation section of EVT Camera User’s Manual. Users need to log in to find be able to download Camera User’s Manual.


The Emergent SDK depends on Rivermax SDK and the Mellanox OFED Network Drivers. If they’re already installed on your system, use the following command when installing the Emergent SDK to avoid duplicate installation:


sudo ./install_eSdk.sh no_mellanox

Ensure the ConnectX is properly configured to use it with the Emergent SDK.

To test if the EVT camera and SDK was installed correctly, run the eCapture application with sudo privileges. First, ensure that a valid Rivermax license file is under /opt/mellanox/rivermax/rivermax.lic, then follow the instructions under the eCapture section of EVT Camera User’s Manual.

  1. Problem: The application fails to find the EVT camera.


  • Make sure that the MLNX ConnectX SmartNIC is configured with the correct IP address. Follow section Configure the ConnectX SmartNIC

  1. Problem: The application fails to open the EVT camera.


  • Make sure that the application was run with sudo privileges.

  • Make sure a valid Rivermax license file is located at /opt/mellanox/rivermax/rivermax.lic.

  1. Problem: Fail to find eCapture application in the home window.


  • Open the terminal and find it under /opt/EVT/eCapture. The applications needs to be run with sudo privileges.

  1. Problem: The eCapture application fails to connect to the EVT camera with error message “GVCP ack error”.

Solutions: It could be an issue with the HR12 power connection to the camera. Disconnect the HR12 power connector from the camera and try reconnecting it.

  1. Problem: The IP address of the Emergent camera is reset even after setting up with the above steps.

Solutions: Check whether the NIC settings in Ubuntu is set to “Connect automatically”. Go to Settings->Network->NIC for the Camera and then unselect “Connect automatically” and in the IPv6 tab, select Disable.

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