  Text-to-video (T2V) generation has recently garnered significant attention
thanks to the large multi-modality model Sora. However, T2V generation still
faces two important challenges: 1) Lacking a precise open sourced high-quality
dataset. The previous popular video datasets, e.g. WebVid-10M and Panda-70M,
are either with low quality or too large for most research institutions.
Therefore, it is challenging but crucial to collect a precise high-quality
text-video pairs for T2V generation. 2) Ignoring to fully utilize textual
information. Recent T2V methods have focused on vision transformers, using a
simple cross attention module for video generation, which falls short of
thoroughly extracting semantic information from text prompt. To address these
issues, we introduce OpenVid-1M, a precise high-quality dataset with expressive
captions. This open-scenario dataset contains over 1 million text-video pairs,
facilitating research on T2V generation. Furthermore, we curate 433K 1080p
videos from OpenVid-1M to create OpenVidHD-0.4M, advancing high-definition
video generation. Additionally, we propose a novel Multi-modal Video Diffusion
Transformer (MVDiT) capable of mining both structure information from visual
tokens and semantic information from text tokens. Extensive experiments and
ablation studies verify the superiority of OpenVid-1M over previous datasets
and the effectiveness of our MVDiT.
