Grok Imagine Extend Video Stops at 30 Seconds. Here's How to Keep the Shot Going

Grok Imagine can generate videos up to 15 seconds and extend them to a 30-second total within the Grok app, but its API-based extension workflow can support longer sequences by repeatedly submitting only the newest 2-to-15-second portion of each result. Each extension adds 2 to 10 seconds, allowing creators using Atlas Cloud’s Video Extend tool or API to build a longer continuous clip by trimming the newly generated tail, using it as the next input, and stitching the segments together afterward. The guide demonstrates this approach with a 40-second lantern-lit market scene built from a 10-second source clip and three 10-second extensions, maintaining continuity through repeated descriptions of the subject, clothing, lighting, framing, and camera movement. It advises structuring each pass around one clear action, cutting at the boundary where new footage begins, and re-encoding cuts to avoid frame-seam issues. The example retained 720p, 24 fps output across all segments and cost $3.81, while noting that shorter uploaded tails can reduce extension costs.

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