SkyReels-Audio: Omni Audio-Conditioned Talking Portraits in Video
  Diffusion Transformers
Authors: name: Zhengcong Fei, name: Hao Jiang, name: Di Qiu, name: Baoxuan Gu, name: Youqiang Zhang, name: Jiahua Wang, name: Jialin Bai, name: Debang Li, name: Mingyuan Fan, name: Guibin Chen, name: Yahui Zhou

The generation and editing of audio-conditioned talking portraits guided by
multimodal inputs, including text, images, and videos, remains under explored.
In this paper, we present SkyReels-Audio, a unified framework for synthesizing
high-fidelity and temporally coherent talking portrait videos. Built upon
pretrained video diffusion transformers, our framework supports infinite-length
generation and editing, while enabling diverse and controllable conditioning
through multimodal inputs. We employ a hybrid curriculum learning strategy to
progressively align audio with facial motion, enabling fine-grained multimodal
control over long video sequences. To enhance local facial coherence, we
introduce a facial mask loss and an audio-guided classifier-free guidance
mechanism. A sliding-window denoising approach further fuses latent
representations across temporal segments, ensuring visual fidelity and temporal
consistency across extended durations and diverse identities. More importantly,
we construct a dedicated data pipeline for curating high-quality triplets
consisting of synchronized audio, video, and textual descriptions.
Comprehensive benchmark evaluations show that SkyReels-Audio achieves superior
performance in lip-sync accuracy, identity consistency, and realistic facial
dynamics, particularly under complex and challenging conditions.