Export yolov7-pose with dynamic batch size

[tvoesolncee]

How to export model properly to ONNX/TRT with dynamic batching?

Changing code by adding dynamic_axes parameter while ONNX export doesn`t work:

torch.onnx.export(model, img, onnx_path, verbose=False, opset_version=12, input_names=['input'], output_names=["output"], dynamic_axes={'input' : {0 : 'batch_size'}, 'output' : {0 : 'batch_size'}})

Viewing model in netron shows input and output with dynamic batch but there is batch size 1 hardcoded operations inside the model.