Converting yolov3 and yolov4 model to onnx without batchedNMS

Yes, you can also change the export code.

It is not very convenient in colab. But you can still refer to Unable to export hdf5 to etlt after Tao Training on Colab - #9 by Morganh and Unable to export hdf5 to etlt after Tao Training on Colab - #11 by Morganh about how to login docker and modify code.