SAM DUMONT
Freelance Cloud & AI Platform Engineer | ex-AWS
Data platforms · Garmin apps · Sensor firmware · Remote-first
Laeken, Belgium
sam@dropbars.be +32 487 633 993 Laeken, Belgium Born 1987-04-02
https://dropbars.be https://www.linkedin.com/in/samdumont/
// BLOG
// TAG: PERFORMANCE
ai-agents audio backup ble bluetooth bot-detection claude code claude-code codex computer-vision debugging e-invoicing embedded esp32 ffmpeg firmware garmin gickup gitea github go gpu hdr kubernetes legacy-software live-photos nginx nrf52 numpy open-source opencv openerp peppol performance profiling protocol python reverse-engineering security self-hosting skills softdevice telemetry terraform video voice writing
Cutting a 4K HDR render from 593 to 166 seconds by doing less work
A ten-minute film took 40 minutes to render, and everyone (including the docs) assumed the encoder was the problem. It wasn't. Replaying decode graphs into a discard sink, converting frames before duplicating them, blurring fewer pixels, and the read-ahead that made an NVIDIA T1000 18% slower.
Read more → ffmpeg python gpu hdr performance profiling codex
Streaming a 4K film through Python because one FFmpeg command ate my disk
One FFmpeg filter graph over twelve 4K clips filled my RAM, then my swap, then my disk. Rewriting assembly as a Python frame loop with constant memory, the HDR and green-frame bugs that came with raw pipes, and a crossfade that went from 37.45 ms to 3.52 ms.
Read more → ffmpeg python numpy opencv video performance claude-code