Video generation¶

Text → video, tri-parity across Azure / GCP / AWS. Every provider is async. The pattern is submit → poll → fetch; the app never waits synchronously.

The pipeline¶

     ┌─────────┐    ┌──────────┐    ┌──────────┐    ┌──────────┐
     │ prompt  │──► │  submit  │──► │  poll    │──► │  fetch   │
     │  text   │    │  (job)   │    │ (status) │    │  bytes   │
     └─────────┘    └──────────┘    └──────────┘    └──────────┘
                        ~1s          ~30-300s+         seconds

Video generation takes 1–5 minutes on every provider. The service returns a job_id immediately and the caller polls a separate endpoint for the finished MP4.

Per-cloud services¶

Cloud	Service	Default model	SDK / API
Azure	Azure OpenAI Sora	`sora-2`	REST `POST /openai/v1/video/generations/jobs` (Sora endpoints are REST-only during preview — no `client.videos.generate` in the openai package yet).
GCP	Vertex AI Veo	`veo-3.1-generate-preview`	`google-genai` `client.models.generate_videos` (returns an Operation; poll with `client.operations.get`).
AWS	Bedrock Nova Reel	`amazon.nova-reel-v1:1`	`boto3` `bedrock-runtime` `start_async_invoke` (result lands in S3; poll with `get_async_invoke`).

Docs verified 2026-08-08¶

Azure OpenAI Sora quickstart — learn.microsoft.com/…/openai/video-generation-quickstart
Vertex AI Veo — ai.google.dev/gemini-api/docs/veo
Bedrock Nova Reel overview — docs.aws.amazon.com/nova/…/video-generation
Bedrock Nova Reel code examples — docs.aws.amazon.com/nova/…/video-gen-code-examples

Model catalog snapshot¶

Provider	Model IDs (verified)	Notes
Azure OpenAI	`sora-2` (current default), `sora-2-pro`, `sora` (legacy)	REST `preview` api-version. Sizes 480×480, 480×854, 720×1280, 1280×720, 1024×1792, 1792×1024. Duration `n_seconds` up to 20 (`sora-2`) or 60 (`sora-2-pro`).
Vertex Veo	`veo-3.1-generate-preview`, `veo-3.1-fast-generate-preview`, `veo-3.1-lite-generate-preview`	Aspect `16:9` or `9:16`. Resolution `720p` (default) / `1080p` / `4k`. Duration `4` / `6` / `8` seconds (8 required for 1080p/4k).
Bedrock Nova Reel	`amazon.nova-reel-v1:1`	1280×720 fixed. 24 fps. `durationSeconds` in 6-second increments up to 120s. Text + optional first-frame image. Requires `outputDataConfig` (S3 URI).

Pages¶

Generate — submit-poll-fetch per provider, verified request shapes.
Deploy — Terraform composing E1 baseline + per-cloud video resources (S3 bucket + IAM for Bedrock; SA + IAM for Vertex; API-version note for Azure).

Validate-only¶

No live video generation in CI. Each page's "verify" block is the local one-liner to run against your own credentials. Live video jobs typically cost a few dollars each — the recipe assumes you'll opt in per-run.