MiniMax Open-Sources H3 Multimodal Video Generation Model with 2K Resolution
MiniMax has officially open-sourced MiniMax H3, a general multimodal video generation model capable of understanding text, image, video, and audio inputs. The model can generate videos up to 15 seconds long with native 32 kHz stereo audio and up to 2K resolution. By open-sourcing a model that natively integrates video and stereo audio generation from complex multimodal contexts, MiniMax lowers the barrier for high-quality, controllable video synthesis. This release intensifies competition in the open-source AI video space, providing developers with a highly flexible alternative to proprietary models. The H3 system consists of three modules: H3-Context-IR for processing multimodal instructions, H3-Base for generating 768p outputs, and H3-Regenerate-2K for upscaling. It features two main modes: H3-Base-FL2VA for first/last frame video generation and H3-Base-Ref2VA for reference-based generation supporting up to 12 mixed input files.
## BACKGROUND
Traditional video generation models often struggle with complex multimodal prompts or require separate models to generate accompanying audio. Reference-to-video (R2V) and first/last-frame-to-video (FL2VA) technologies allow users to guide the generation process more precisely by using existing images, videos, or audio as anchors, ensuring consistency in characters, style, and pacing.