ComfyUI Node: (down)Load SAM3 Model

(down)Load SAM3 Model:

The LoadSAM3Model node is designed to seamlessly integrate the SAM3 model with ComfyUI's memory management system, providing a robust solution for both image segmentation and video tracking workflows. This node automatically manages GPU and CPU resources, offloading tasks based on VRAM availability to optimize performance. It ensures proper cleanup when models are unloaded, preventing memory leaks and maintaining system efficiency. Additionally, if the specified model is not found locally, the node can automatically download it from HuggingFace, ensuring that you always have access to the necessary resources without manual intervention. This integration simplifies the process of working with complex models, making it accessible even to those with limited technical expertise.

(down)Load SAM3 Model Input Parameters:

model_path

The model_path parameter specifies the location of the SAM3 model checkpoint file. This can be a relative path from the ComfyUI root directory or an absolute path. If the model file is not found at the specified location, the node will automatically download it from HuggingFace, ensuring that you have the required model available for your tasks. The default value is set to "models/sam3/sam3.pt", which is a common location for storing model files. This parameter is crucial as it determines the source of the model that will be loaded and used for processing.

(down)Load SAM3 Model Output Parameters:

sam3_model

The sam3_model output parameter represents the loaded SAM3 model, which is ready to be used for image segmentation and video tracking tasks. This output is crucial as it provides the actual model instance that can be utilized in subsequent processing nodes within ComfyUI. The model is fully integrated with ComfyUI's memory management, ensuring efficient resource usage and performance optimization.

(down)Load SAM3 Model Usage Tips:

• Ensure that the model_path is correctly specified to avoid unnecessary downloads and to speed up the loading process.
• Utilize the automatic download feature by keeping the default path if you are unsure about the model's location, as this will ensure you always have the latest version from HuggingFace.

(down)Load SAM3 Model Common Errors and Solutions:

[SAM3] Checkpoint file not found: <checkpoint_path>``

• Explanation: This error occurs when the specified checkpoint file cannot be found at the given path.
• Solution: Verify that the model_path is correct and that the file exists at the specified location. If the file is missing, ensure that the node is set to download the model from HuggingFace.

[SAM3] Invalid or corrupted checkpoint file.

• Explanation: This error indicates that the checkpoint file is either invalid or corrupted, preventing the model from loading correctly.
• Solution: Check the integrity of the checkpoint file. If it is corrupted, try downloading the model again from HuggingFace to obtain a valid file.

[SAM3] Device error - GPU may not be available or out of memory.

• Explanation: This error suggests that there is an issue with the GPU, either because it is not available or there is insufficient memory to load the model.
• Solution: Ensure that your system has a compatible GPU with enough memory. Consider reducing the workload or offloading some tasks to the CPU if VRAM is limited.