{"product_id":"n8n-workflow-narrate-google-slides-with-gemini-tts-shotstack","title":"n8n Workflow: Narrate Google Slides with Gemini TTS \u0026 Shotstack","description":"\u003ch3\u003eNarrate Google Slides automatically—with Gemini TTS, smart re-voicing, and Shotstack-rendered captions\u003c\/h3\u003e\n\u003cp\u003eThis n8n workflow turns your \u003cstrong\u003eGoogle Slides speaker notes\u003c\/strong\u003e into a narrated video. It \u003cstrong\u003ere-voices only the slides that changed\u003c\/strong\u003e, uses \u003cstrong\u003eGemini\u003c\/strong\u003e to draft the narration and suggest pronunciations, and then renders captioned \u003cstrong\u003eMP4\u003c\/strong\u003e videos via \u003cstrong\u003eShotstack\u003c\/strong\u003e—uploading the final results to \u003cstrong\u003eGoogle Drive\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStarts\u003c\/strong\u003e from an \u003cstrong\u003en8n Form submission\u003c\/strong\u003e (with a Google Slides URL and options) or a scheduled \u003cstrong\u003eweekday 8:00\u003c\/strong\u003e run.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoads\u003c\/strong\u003e the presentation and fingerprints each non-skipped slide (including \u003cstrong\u003espeaker notes\u003c\/strong\u003e and voice settings).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDetects changes\u003c\/strong\u003e by comparing against stored slide records in an \u003cstrong\u003en8n Data Table\u003c\/strong\u003e, so unchanged slides are reused.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRebuilds narration\u003c\/strong\u003e for each changed slide using a \u003cstrong\u003eGoogle Gemini agent\u003c\/strong\u003e that rewrites notes into a narration script and flags issues.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandles pronunciations\u003c\/strong\u003e by looking up reading dictionary entries in an \u003cstrong\u003en8n Data Table\u003c\/strong\u003e tool, generating proposed pronunciations when needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenerates audio\u003c\/strong\u003e with \u003cstrong\u003eGemini TTS\u003c\/strong\u003e, uploads slide image + audio to \u003cstrong\u003eShotstack\u003c\/strong\u003e, and upserts updated scripts\/captions\/durations\/asset URLs back into the slide Data Table.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRoutes review\u003c\/strong\u003e to \u003cstrong\u003eSlack\u003c\/strong\u003e for approval\/rejection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRenders \u0026amp; publishes\u003c\/strong\u003e an edit timeline in Shotstack (reusing unchanged assets), renders the final \u003cstrong\u003ecaptioned MP4\u003c\/strong\u003e, uploads to \u003cstrong\u003eGoogle Drive\u003c\/strong\u003e, and logs the render back to the Data Table.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUpdate training or product deck videos whenever speaker notes change—without re-rendering everything.\u003c\/li\u003e\n  \u003cli\u003eMaintain consistent narration pronunciation using a shared dictionary and Gemini TTS voices.\u003c\/li\u003e\n  \u003cli\u003eGive reviewers a Slack-based approval step before costly Shotstack renders.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBuilt with n8n nodes such as \u003cstrong\u003eif\u003c\/strong\u003e, \u003cstrong\u003eset\u003c\/strong\u003e, \u003cstrong\u003ecode\u003c\/strong\u003e, \u003cstrong\u003eno op\u003c\/strong\u003e, \u003cstrong\u003ewait\u003c\/strong\u003e, and \u003cstrong\u003eslack\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eIntegrates \u003cstrong\u003eGoogle Slides\u003c\/strong\u003e, \u003cstrong\u003eGoogle Gemini (agent + TTS)\u003c\/strong\u003e, \u003cstrong\u003eSlack\u003c\/strong\u003e, \u003cstrong\u003eShotstack\u003c\/strong\u003e, and \u003cstrong\u003eGoogle Drive\u003c\/strong\u003e, using \u003cstrong\u003en8n Data Tables\u003c\/strong\u003e for slide change detection and pronunciation\/script storage.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":46326534373555,"sku":"N8N-21744","price":5.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/tdh6g-ci9WcNVWHHdubCn_jbt01fab.png?v=1793352071","url":"https:\/\/buyflowscripts.com\/products\/n8n-workflow-narrate-google-slides-with-gemini-tts-shotstack","provider":"N8N Commerce","version":"1.0","type":"link"}