This is the C3D model used with a fork of Caffe to the Sports1M dataset migrated to Keras. Details about the network architecture can be found in the following arXiv paper:
Tran, Du, et al. "Learning Spatiotemporal Features With 3D Convolutional Networks." Proceedings of the IEEE International Conference on Computer Vision. 2015.
Download: weights
@yzexeter sorry for the late reply. yes, the caffe.proto is in v2 format (and to be compiled as such), and it seems v3 has non-backward-compatible features. http://stackoverflow.com/questions/33204321/upgrading-protobuf-from-version-2-to-3-incompatible-with-protobuf-default-valu