  Generating customized content in videos has received increasing attention
recently. However, existing works primarily focus on customized text-to-video
generation for single subject, suffering from subject-missing and
attribute-binding problems when the video is expected to contain multiple
subjects. Furthermore, existing models struggle to assign the desired actions
to the corresponding subjects (action-binding problem), failing to achieve
satisfactory multi-subject generation performance. To tackle the problems, in
this paper, we propose DisenStudio, a novel framework that can generate
text-guided videos for customized multiple subjects, given few images for each
subject. Specifically, DisenStudio enhances a pretrained diffusion-based
text-to-video model with our proposed spatial-disentangled cross-attention
mechanism to associate each subject with the desired action. Then the model is
customized for the multiple subjects with the proposed motion-preserved
disentangled finetuning, which involves three tuning strategies: multi-subject
co-occurrence tuning, masked single-subject tuning, and multi-subject
motion-preserved tuning. The first two strategies guarantee the subject
occurrence and preserve their visual attributes, and the third strategy helps
the model maintain the temporal motion-generation ability when finetuning on
static images. We conduct extensive experiments to demonstrate our proposed
DisenStudio significantly outperforms existing methods in various metrics.
Additionally, we show that DisenStudio can be used as a powerful tool for
various controllable generation applications.
