Complete A/B video pipeline — storyboard, Veo 3 batch generation, browser preview with feedback loop, and ffmpeg assembly into final videos. Use when creating multi-scene videos, running A/B tests on hooks/CTAs, previewing clips before stitching, or assembling a final cut from approved clips.

完整A/B视频流程——包括分镜设计、Veo 3批量生成、浏览器预览与反馈循环，以及通过ffmpeg合成最终视频。适用于创建多场景视频、对吸引点和行动号召进行A/B测试、拼接前预览片段，或从已审批片段中组装最终成片