how to get the pretrained ssd300 model (.hdf5)?

[liuwei16]

By the way, how to transfer the caffemodel to .hdf5 file?

[pierluigiferrari]

I know of some tools others have built, which you can find here, here, and here, although I haven't tried those yet and cannot say how well they work. Most of them seem focussed on converting the model (not only the weights), which could be problematic with the custom layers in SSD.

You could also install Caffe and convert the original weights to HDF5 from within Caffe, but of course that would require to get into Caffe to a certain level (which I haven't gotten around to doing yet).