Recommendation
Use ChatGPT (or Canva’s Magic Write) to convert the long post into a tightly timed script and captions, then use Canva AI + Bulk Create and Text-to-Speech (or an external TTS via API) to assemble, caption, voice, thumbnail and export. This hybrid keeps creative control while enabling batch automation.

Decision criteria (pick approach)
- Budget: low = Canva-only (Magic Write + Canva TTS); medium/scale = ChatGPT + Canva API/Bulk Create + external TTS; high = custom pipeline with ElevenLabs-style voices and automated scheduling.
- Skill / team: solo/marketing = Canva UI workflows; developer/agency = API + Zapier/Make/custom scripts for full automation.
- Output quality: in-app TTS + Canva assets = good; external TTS + human editing = broadcast quality.

Step-by-step repeatable workflow
1) Template setup in Canva (one-time)
- Create a 9:16 video template with 6–8 scenes (6–10s each), text placeholders, a thumbnail template, and a “voiceover” audio track placeholder. Save as team template.
2) Script & storyboard generation (ChatGPT or Magic Write)
- Prompt: paste blog, ask for: a 2-sentence hook, 4–6 concise scenes with timestamps (e.g., 0–7s hook; 7–20s point1), SRT-formatted captions and a short thumbnail headline. Request on-screen text variants (short/long).
- Output: scene CSV rows: scene_index, on-screen_text, caption, visual_keyword, audio_text, timestamp.
3) Bulk import into Canva
- Use Canva Bulk Create (CSV) to populate each slide’s text fields and thumbnail text. If automating, use Canva API or Zapier to push the CSV into the template to create a new design per post.
4) Voiceover
- Quick: use Canva Text-to-Speech per scene (select voice, paste audio_text).
- Better (scale): send audio_text via your TTS API (ElevenLabs, etc.), get mp3s, then programmatically upload/assets into Canva design (or stitch audio externally and import a single audio file).
5) Captions/Subtitles
- Generate SRT from your script (ChatGPT can), then import into Canva if available; otherwise use Bulk Create to place captions on each scene (burned-in subtitles).
6) Visual assets
- For each scene use the visual_keyword to auto-search Canva’s stock (or AI-generated frames) and populate image/video placeholders. If branding required, add team brand kit to template.
7) Export & thumbnail
- Export video (mp4) and separate thumbnail (JPG/PNG). Automate exports with the Canva API or schedule manual export from the design.
8) Publish & schedule
- Push outputs to your social scheduler or storage. For full automation, hook the pipeline to Zapier/Make or a custom script that runs on CMS publish.

Best-for / Avoid-if
- Best-for: teams needing fast, repeatable social clips from long-form content; low editing overhead.
- Avoid-if: you need cinematic edits or actors — use human voiceover and manual edit.

Practical checklist before first run
- Create and lock a 9:16 Canva template with brand kit.
- Build and test a ChatGPT prompt that returns CSV-ready scene data + SRT.
- Test Canva Bulk Create with one CSV import.
- Choose TTS: Canva TTS (fast) or external provider (quality).
- Automate trigger (CMS publish → script → create CSV → Canva import → export).
- Add one human QA step for tone, factual accuracy, and timing.

Notes on scale
Automating at scale needs developer work to connect ChatGPT → CSV generator → Canva API/Bulk Create → TTS API → storage/scheduler. For small teams, run the same steps manually inside Canva using Magic Write and Bulk Create and preview each video before export.

Mentioned tools: Canva AI (canva-ai) and ChatGPT (chatgpt).

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