VideoComposer: Compositional Video Synthesis with Motion Controllability

TL;DR

VideoComposer introduces a novel method for controllable video synthesis that integrates textual, spatial, and temporal conditions, including motion vectors, to generate videos with high inter-frame consistency and flexible content control.

Contribution

It presents a new compositional framework for video synthesis that effectively incorporates motion vectors and a spatio-temporal encoder for enhanced controllability and consistency.

Findings

Achieves high inter-frame consistency in synthesized videos.

Enables control via multiple input modalities like text, sketches, and motion.

Demonstrates flexible and precise video content creation.

Abstract

The pursuit of controllability as a higher standard of visual content creation has yielded remarkable progress in customizable image synthesis. However, achieving controllable video synthesis remains challenging due to the large variation of temporal dynamics and the requirement of cross-frame temporal consistency. Based on the paradigm of compositional generation, this work presents VideoComposer that allows users to flexibly compose a video with textual conditions, spatial conditions, and more importantly temporal conditions. Specifically, considering the characteristic of video data, we introduce the motion vector from compressed videos as an explicit control signal to provide guidance regarding temporal dynamics. In addition, we develop a Spatio-Temporal Condition encoder (STC-encoder) that serves as a unified interface to effectively incorporate the spatial and temporal relations of sequential inputs, with which the model could make better use of temporal conditions and hence achieve higher inter-frame consistency. Extensive experimental results suggest that VideoComposer is able to control the spatial and temporal patterns simultaneously within a synthesized video in various forms, such as text description, sketch sequence, reference video, or even simply hand-crafted motions. The code and models will be publicly available at https://videocomposer.github.io.