M3U8 Segment Analyzer

Yes, this is normal. m3u8 segment durations may vary based on video content complexity, encoding settings, etc., as long as within reasonable range (typically 2-10 seconds).

The number of segments itself does not affect playback but may increase player request overhead. Modern players handle large numbers of segments well, mainly affecting initial load time.

EXT-X-MAP tag specifies initialization segment, used for video decoding initialization in fMP4 format, containing necessary metadata information.

Playback stuttering can be caused by various reasons: unstable network connection, slow server response, large segments, unreasonable encoding parameters. Use this tool to analyze segment structure and help locate issues.

If segment list shows KEY information, or overview card shows "AES-128" encryption, it indicates m3u8 file is encrypted. View detailed KEY list in encryption information section.

Master Playlist contains references to multiple Variant Streams, allowing player to dynamically switch quality based on network conditions. Contains RESOLUTION, BANDWIDTH information.

m3u8 is HLS protocol playlist file containing URI list pointing to actual video data (usually TS format). TS files are actual video segments.

In segment list, view each segment's URI, duration, KEY information, status, and operations. Click copy button to copy segment address, click preview button to view segment content.

TARGETDURATION defines maximum duration of media segments, actual segment duration should be less than or equal to this value. If segment duration exceeds TARGETDURATION, encoding issues may exist.

This may be due to variable bitrate encoding (VBR), keyframe position, or content complexity changes. While not necessarily errors, may cause inconsistent playback experience.

Use "Check segment accessibility" advanced option, sends HEAD request to each segment, detects accessibility, displays results in status column.

DISCONTINUITY tag indicates discontinuity of certain attributes in playlist, like codec changes, timeline jumps, or subtitle track changes, requiring special handling by player.

Enable "Show CDN domain" option to view domain distribution of each segment. Tool also displays domain count, main domain, and distribution statistics in CDN analysis section.

If playlist has no ENDLIST tag, usually indicates live stream. Live streams continuously update, while VOD streams have EXTX-ENDLIST tag at end.