Tiered Verification: When 'Failed' Is the Wrong Answer
The all-or-nothing verifier was failing jobs that produced visually perfect output. Here's how three verdicts replaced a binary gate.
Read post →Engineering
How vdowrx was built
A chronological record of every major architectural decision, bug, and tradeoff behind the pipeline — from the first commit to production.
The Float Epsilon Bug: How 2.2×10⁻¹⁶ Broke the Pixel Integrity Guarantee
Machine epsilon caused a Lanczos scale step which caused a pixel provenance failure. A three-layer causation chain, one line fix.
Read post →Content Presets: Teaching the Pipeline What Kind of Video It’s Processing
“Reframe this video” means something different for a podcast versus an action sequence. Here's how 9 presets and a custom weight builder solved it.
Read post →Any Aspect Ratio: Rearchitecting the Pipeline’s Input Contract
Early users uploaded portrait and square videos. The pipeline rejected them. Here’s how SourceMetadata was refactored to support multiple output ratios.
Read post →The Frontend: Next.js Static Export on CloudFront
Zero SSR, fully static, served from S3. The constraints are real but the tradeoffs were worth it. Six API contract mismatches discovered at UAT.
Read post →The API: FastAPI on ECS Fargate
The complete SaaS API surface: job lifecycle, tier gating, auth, billing, webhooks. And two packaging landmines you won’t find in any docs.
Read post →Infrastructure as Code: Building the AWS Backbone
VPC, RDS, SQS, AWS Batch, three Lambda workers, CloudFront, S3 — all in Pulumi Python. And the reserved env var that costs you a failed deploy.
Read post →The Pipeline: Nine Modules, One Hard Constraint
Before any cloud infrastructure, before any API — there was a Python pipeline with one rule: every output pixel must be a direct copy of a source pixel.
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