Architecture

Audio works, video is black: debugging a layered WebRTC SFU in Go

Audio connects instantly, the viewer hears everything, and the video tile stays black. The publisher side looks fine. ReplaceTrack returns nil , whi…

EP05: How Simulcast works and what it's for

Episode 5 of 20 in the **PPCDN Low-Latency Live Streaming Course * — building a self-hosted, low-latency live-streaming CDN from protocols to global…

EP04: Transport showdown — RTMP / SRT / WHIP

Episode 4 of 20 in the **PPCDN Low-Latency Live Streaming Course * — building a self-hosted, low-latency live-streaming CDN from protocols to global…

I Ran the Zombie Match Cut on 4 Video Models: Frame Timing and Cut Placement

You've probably seen the TikTok trend captioned "would you still love me if I were a zombie." It relies on a classic editing trick: the match cut. T…

Generated Promo Videos API: Store and Expire Game Assets with Telemetry

To store and expire generated promo videos safely, make retention part of the API record instead of relying on a storage folder and a cleanup timer.…

Check whether hls.js is actually using a worker (most ESM setups aren't)

TL;DR If you import Hls from 'hls.js' , you are probably getting the ESM build, and the ESM build does not bundle the transmuxer worker. Transmuxing…

Build a React Native video upload that survives backgrounding, app kills, and cellular

TL;DR A fetch() upload dies when the OS suspends your app, and your JS context is recreated with no memory of it. We are going to build an upload th…

Build semantic search inside video: shot embeddings + transcript chunks, fused on the timeline

TL;DR Frame-only video search can't find "where she explains pricing." Transcript-only search can't find "the architecture diagram slide." We'll bui…

Building a Perceptual Hash Pipeline for Video Deduplication in Python

A single viral clip never stays a single file. Within hours of a video trending, our crawlers pull the "same" clip back a dozen times: re-encoded at…

Running FFmpeg on Heroku: The Ephemeral-Filesystem Trap (and the Fix)

Originally published at ffmpeg-micro.com Your FFmpeg pipeline works on localhost. You push to Heroku, trigger a transcode, and the job vanishes. No…

ZTA: Zero Token Architecture

FFmpeg chromakey Filter: Remove Green Screen Backgrounds

Originally published at ffmpeg-micro.com Green screen removal is one of those FFmpeg operations that looks simple until you actually try it. Most tu…

Shipping Async Video Background Removal at $0.10/sec

Why async matters for video I've been running useKnockout - a background removal API that processes images in ~200ms - for a few months. Images are…

The "AI avatar generator" category is three rendering architectures wearing one label

If you evaluate AI avatar tools as if they're interchangeable — type a script, get a talking head — you'll pick the wrong one and then blame the too…

Ship a 'Go Live' button: OBS in, LL-HLS out, webhooks in between

TL;DR We're adding live streaming to a SaaS dashboard: a backend endpoint that creates a stream, OBS as the broadcaster over RTMPS, LL-HLS playback…

5 video APIs compared on what's included before you pay extra (2026)

📦 Code: github.com/USER/video-api-bench - replace before publishing TL;DR The per-minute delivery rate is the easiest number to compare and the leas…

Build a UGC video moderation pipeline with FFmpeg + NudeNet

TL;DR If your product lets strangers upload video, you need moderation before launch, not after the first bad upload. We will build a small-team pip…

How to Use FFmpeg with C# (No Installation Required)

Originally published at ffmpeg-micro.com Most C# video processing guides start the same way: download an FFmpeg binary, add it to your PATH, then ca…

Veo 4 Doesn't Exist Yet, But People Are Already Selling It

I went looking for Google Veo 4 last week. I had three browser tabs open with "Veo 4" landing pages, a credit card warmed up, and 30 minutes blocked…

Engineering a High-Performance Reddit Video Downloader: Decoding DASH, HLS, and Client-Side Transmuxing

As developers, we often perceive video downloading as a simple GET request to a .mp4 URL. However, modern social media giants like Reddit have moved…

FFmpeg CRF Explained: Quality vs File Size Guide

Originally published at ffmpeg-micro.com Every video encoder faces the same tradeoff: quality vs. file size. CRF (Constant Rate Factor) is how FFmpe…

Деконструкция медиа-стека TikTok: построение высокопроизводительного движка экстракции видео без водяных знаков

Введение Для нас, разработчиков, TikTok — это не просто социальная сеть, а сложнейшая инженерная экосистема распределения контента. С точки зрения с…

Bedah Arsitektur Media TikTok: Membangun Engine Ekstraksi Video Tanpa Watermark Berperforma Tinggi

Pendahuluan Sebagai software engineer, kita sering terpukau oleh bagaimana platform skala global seperti TikTok mengelola dan mendistribusikan volum…