What it does
H3 Max is a browser-based AI video creation tool with Product Agent, text-to-video, and image-to-video workflows. Product Agent prepares an advertising prompt from a product photo and supports batch product videos. H3 Max offers clips from 5 to 15 seconds with 480P and 768P output options.
Building reliable video jobs
Video generation can continue after a browser tab closes. H3 Max uses a callback-first job flow on Vercel: provider callbacks save completed results, while a delayed queue check sends unresolved work to a recovery Workflow. The recovery path checks the current database state before taking action.
Engineering considerations
Duplicate messages, missing callbacks, deleted jobs, and temporary handoff failures all need explicit handling. The initial 60-second recovery checkpoint is not a promise that every video finishes in a minute.
Learn more
Try H3 Max at https://h3-max.me/. An implementation note explains the recovery design: https://dev.to/zhenyu_xu_b378d8d11d18138/a-callback-first-recovery-pattern-for-ai-video-jobs-on-vercel-2efo
Built With
- vercel
Log in or sign up for Devpost to join the conversation.