ITPUB

Feb 8, 2026 · Fundamentals

Why Chrome Sends Hundreds of 206 Requests for One MP4 and How FFmpeg Fixes It

An MP4 video with a misplaced moov box and poor interleaving caused Chrome to issue an initial three 206 requests followed by thousands of range‑jumping requests, inflating CDN traffic, while re‑encoding the file with FFmpeg faststart eliminated the excess requests and restored normal bandwidth usage.