  Live commenting on video, a popular feature of live streaming platforms,
enables viewers to engage with the content and share their comments, reactions,
opinions, or questions with the streamer or other viewers while watching the
video or live stream. It presents a challenging testbed for AI agents, which
involves the simultaneous understanding of audio-visual multimodal contexts
from live streams and the ability to interact with human viewers through
dialogue. As existing live streaming-based comments datasets contain limited
categories and lack a diversity, we create a large-scale audio-visual
multimodal dialogue dataset to facilitate the development of live commenting
technologies. The data is collected from Twitch, with 11 different categories
and 575 streamers for a total of 438 hours of video and 3.2 million comments.
Moreover, we propose a novel multimodal generation model capable of generating
live comments that align with the temporal and spatial events within the video,
as well as with the ongoing multimodal dialogue context. Our initial results
have demonstrated the effectiveness of the proposed model, providing a robust
foundation for further research and practical applications in the field of live
video interaction.
