M3U8 Debugging Tips

Common Issue Diagnosis

When using M3U8 streams, various issues may occur:

• Cannot play: Check M3U8 URL validity, use curl or browser to verify valid M3U8 content.
• Buffering: Check network bandwidth, monitor buffering events via browser Network panel.
• Poor quality: Check if M3U8 contains multiple bitrate options, verify player selection.
• Audio-video sync: May be encoding issue, check source timestamps.

Browser DevTools

Browser DevTools are essential for M3U8 debugging:

• Network panel: Monitor all requests, view M3U8 and TS segment loading. Filter XHR for HLS requests.
• Console panel: View JS errors and warnings. HLS.js outputs detailed debug info.
• Performance panel: Analyze page performance bottlenecks.

HLS.js Debugging

• Log level: Set hls.config.debug for log output level.
• Event监听: Listen for FRAG_LOADED, ERROR events.
• Status check: Check hls.media.readyState and networkState.