onnxruntime-ep-openvino 1.4.1

OpenVINO Execution Provider plugin for ONNX Runtime

ONNX Runtime OpenVINO Execution Provider Plugin

This package provides the OpenVINO™ Execution Provider plugin for ONNX Runtime.

Installation

Prerequisites

1. ONNX Runtime: Install separately (this package does NOT include ONNX Runtime)

   pip install onnxruntime>=1.23.0
   

2. Platform: Pre-built wheels available for:

   • Windows x64
   • Linux x86_64 (manylinux_2_28 compatible — glibc 2.28+, e.g. RHEL 8, Ubuntu 20.04+)

Install the Plugin

pip install onnxruntime-ep-openvino

Note: This package is distributed as binary wheels only. If no wheel is available for your platform/Python version, installation will fail. Source builds are not supported.

Usage

Basic Example

import onnxruntime as ort
import onnxruntime_ep_openvino as openvino_ep

# Get the plugin library path
ep_lib_path = openvino_ep.get_library_path()

# Register the plugin with ONNX Runtime
registration_name = "openvino_ep"
ort.register_execution_provider_library(registration_name, ep_lib_path)

# Get the EP name
ep_name = openvino_ep.get_ep_name()

# Get available OpenVINO devices
all_ep_devices = ort.get_ep_devices()
openvino_devices = [d for d in all_ep_devices if d.ep_name == ep_name]

if not openvino_devices:
    raise RuntimeError("No OpenVINO devices found")

# Select OpenVINO CPU device
cpu_devices = [d for d in openvino_devices if d.ep_metadata.get("ov_device") == "CPU"]

if not cpu_devices:
    raise RuntimeError("No OpenVINO CPU device found")

# Create session options
sess_options = ort.SessionOptions()

# Add OpenVINO EP to the session
ep_options = {}
sess_options.add_provider_for_devices([cpu_devices[0]], ep_options)

# Create inference session
model_path = "path/to/model.onnx"
session = ort.InferenceSession(model_path, sess_options=sess_options)

# Run inference
# ... your inference code here ...

# Clean up
del session

# Unregister the library after all sessions are closed
ort.unregister_execution_provider_library(registration_name)

Helper Functions

get_library_path()

Returns the full path to the OpenVINO EP plugin library.

import onnxruntime_ep_openvino as openvino_ep

lib_path = openvino_ep.get_library_path()
print(f"Plugin library: {lib_path}")

get_ep_name()

Returns the name of the Execution Provider: "OpenVINOExecutionProvider"

ep_name = openvino_ep.get_ep_name()
print(f"EP name: {ep_name}")

get_ep_names()

Returns a list containing the EP name (for compatibility with multi-EP plugins).

ep_names = openvino_ep.get_ep_names()
# Returns: ['OpenVINOExecutionProvider']

Troubleshooting

Library Not Found

If you get a FileNotFoundError, ensure:

1. The package is properly installed: pip list | grep onnxruntime-ep-openvino
2. Reinstall if needed: pip install --force-reinstall onnxruntime-ep-openvino

Note: OpenVINO and TBB libraries are bundled with the package - no separate installation needed!

No Devices Found

If get_ep_devices() doesn't return OpenVINO devices:

1. Check that the plugin is registered before calling get_ep_devices()
2. Verify your hardware is supported by OpenVINO
3. Restart your Python session after installation

Version Compatibility

• Requires ONNX Runtime 1.23.0 or later

License

This project is licensed under the MIT License

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