TECHNICAL MANUAL

Field notes for a post-format-war media desk.

Practical explainers for codecs, browser-local processing, responsible AI and file retention.

How to Extract MP3 Audio from MP4 Without Uploading the Video

A practical guide to browser-local MP4-to-MP3 extraction, codecs, quality settings, and privacy tradeoffs.

Compare compatibility, compression, transparency, encoding speed and quality for JPEG, WebP and AVIF.

Understand how WebAssembly ports of FFmpeg work, what can run locally, and where cloud processing remains necessary.

Learn the structural differences between SRT and WebVTT, styling support, accessibility, and export workflows.

AIMP6 explains consent, voice ownership, synthetic media labels, and why TTS tools must prevent misuse.

A practical method for choosing JPEG, WebP or AVIF quality settings and measuring visible savings.

Compare local processing, temporary cloud objects, retention policies, manual deletion and privacy claims.

How to turn raw audio into transcripts, highlights, chapter markers and show notes without losing accuracy.

Architecture notes for signed uploads, job state, polling, SSE progress, retention and webhooks.

Understand HEIC containers, HEVC licensing, platform support, and when to export JPEG, WebP or AVIF.