SHTVS: Shot-level based Hierarchical Transformer for Video Summarization

In this paper, a Shot-level based Hierarchical Transformer for Video Summarization (SHTVS) is proposed for supervised video summarization. Different from most existing methods that employ bidirectional long short-term memory or use self-attention to replace certain components while keeping their overall structure in place, our methods show that a pure Transformer with video feature sequences as its input can achieve competitive performance in video summarization. In addition, to make better use of the multi-shot characteristic in a video, each video feature sequence is firstly split into shot-level feature sequences with kernel temporal segmentation, and then fed into shot-level Transformer encoder to learn shot-level representations. Finally, shot-level representations and original video feature sequence are integrated for the frame-level Transformer encoder to predict frame-level importance scores. Extensive experimental results on two benchmark datasets (SumMe and TVSum) prove the effectiveness of our methods.