
FFmpeg 9.1: what to re-test before you upgrade
FFmpeg 9.1 ships the rewritten AAC encoder deferred from 9.0, so `-c:a aac` output changes silently. What to re-measure, how to pin, why it's no security fix.
Learn about video processing, FFmpeg workflows, automation, and scaling tips.

FFmpeg 9.1 ships the rewritten AAC encoder deferred from 9.0, so `-c:a aac` output changes silently. What to re-measure, how to pin, why it's no security fix.

n8n execution crashed with startedAt null is a 2.45.0 queue mode race, not your workflow. Fix: upgrade to 2.45.1+, then stop blocking the worker event loop.

n8n Convert to File base64 writing a corrupt video? The data URI prefix shifts every byte. The 2.45.0 fix, a Set node workaround, and the safer pattern.

Meta ads video variants: per-creative age and gender needs a broad ad set. Render one hook bar per persona from one master clip, in FFmpeg or one API call.

The YouTube Shorts bonus program wants 12 Shorts per calendar month. The pipeline that cuts them from one long upload, reframes to 9:16, and stays original.

A resize drops C2PA metadata from video: FFmpeg rebuilds the MP4 without the uuid box. Where Content Credentials live, what breaks them, and the check to run.

Gemini 4 Argon video input doubles to $4 per 1M tokens on Dec 1, 2026. Five FFmpeg prep levers that cut the token bill, plus the one-call API equivalent.

The FFmpeg 9 filter graph rewrite claim, tested: we reran four documented errors on 8.1.3 and 9.0.2 to show which workarounds you can delete and which stay.

The n8n security update patch landed Oct 14, 2026. If your Docker image has FFmpeg baked in, docker compose pull won't patch it. The rebuild, in order.

Kling 4.0 TikTok washed out? Most 21:9 and 4K clips need a Rec.709 re-tag, not a tone map. ffprobe first, then the crop-vs-pad math for 9:16, 1:1 and 4:5.