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在视频生成任务中如何应用ColossalAI的Open-Sora方案?

2025-09-05 1.4 K

Open-Sora视频生成实战指南

Implementation Steps:

  • Environmental Preparation:使用预构建Docker镜像hpcaitech/open-sora确保依赖一致
  • Data processing:将视频按帧分割为h5py格式存储,建议256×256分辨率
  • 训练配置:modificationsconfigs/video_diffusion.yaml中的并行策略(16GPU推荐2D并行)
  • Start command:torchrun --nproc_per_node=16 train.py --config=configs/video_diffusion.yaml

Performance Optimization:

  • opensflashattention减少25%显存占用
  • utilizationkv-cache加速自回归生成
  • 批量生成时启用paged_attention

Caveats:720p视频生成建议至少80GB显存,可通过降低num_frames参数分阶段生成。

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