Legal M3U8 to MP4 Processing Guide

This page does not provide third-party video parsing or automated collection. It documents how developers can package, validate, and troubleshoot HLS media they own or are licensed to process.

Use Boundaries

Process only HLS/m3u8 media you created, uploaded, own, or have explicit permission to handle.
Do not process third-party content protected by login, payment, DRM, temporary tokens, or other access controls.
If browser playback fails, first check CORS, MIME type, playlist expiration, and codec compatibility.

This site does not store, proxy, or obtain third-party media content on a user's behalf.

FFmpeg Local Packaging Example

For a publicly readable and authorized HLS playlist, test whether FFmpeg can package the original streams into MP4 without re-encoding:

ffmpeg -i "https://example.com/owned-media/index.m3u8" -c copy output.mp4

Actual results depend on the original container, codecs, and player support. If you see audio drift, no sound, or a black screen, inspect the streams first with ffprobe.

Troubleshooting Checklist

Confirm the m3u8 response is HTTP 200 and starts with #EXTM3U.
Confirm segment URLs are absolute or resolve correctly relative to the playlist location.
Confirm the server returns an appropriate Content-Type, such as application/vnd.apple.mpegurl or application/x-mpegURL.
Confirm browser playback is allowed by CORS, especially Access-Control-Allow-Origin.
Confirm the content is not protected by DRM, keys, or expired signatures you are not authorized to access.