Numerous studies in the field of music generation have demonstrated
impressive performance, yet virtually no models are able to directly generate
music to match accompanying videos. In this work, we develop a generative music
AI framework, Video2Music, that can match a provided video. We first curated a
unique collection of music videos. Then, we analysed the music videos to obtain
semantic, scene offset, motion, and emotion features. These distinct features
are then employed as guiding input to our music generation model. We transcribe
the audio files into MIDI and chords, and extract features such as note density
and loudness. This results in a rich multimodal dataset, called MuVi-Sync, on
which we train a novel Affective Multimodal Transformer (AMT) model to generate
music given a video. This model includes a novel mechanism to enforce affective
similarity between video and music. Finally, post-processing is performed based
on a biGRU-based regression model to estimate note density and loudness based
on the video features. This ensures a dynamic rendering of the generated chords
with varying rhythm and volume. In a thorough experiment, we show that our
proposed framework can generate music that matches the video content in terms
of emotion. The musical quality, along with the quality of music-video matching
is confirmed in a user study. The proposed AMT model, along with the new
MuVi-Sync dataset, presents a promising step for the new task of music
generation for videos.

在本研究中，我们开发了一个名为 Video2Music 的生成音乐 AI 框架，能够根据提供的视频生成配套的音乐。我们的方法通过分析音乐视频获取语义、场景、运动和情感特征，并利用这些特征来指导音乐生成模型。我们还创建了一个称为 MuVi-Sync 的多模态数据集，用于训练新颖的 Affective Multimodal Transformer (AMT) 模型，以生成与视频相匹配的音乐。在实验证明，我们的提出的框架能够生成与视频内容情感相符的音乐，并通过用户研究证实了音乐质量和音乐与视频的匹配质量。我们的提出的 AMT 模型和新数据集 MuVi-Sync 为视频音乐生成任务迈出了有希望的一步。