The essentials
- #EXTM3U — the required first line
- #EXTINF — describes a single entry (duration and name)
- The line after #EXTINF — the stream URL
Common attributes
- tvg-id — links a channel to EPG data
- tvg-logo — the channel icon
- group-title — the category a channel belongs to
M3U vs M3U8
The .m3u8 extension simply signals the file is UTF-8 encoded. The structure is otherwise the same as classic .m3u.