The Mandatory Header
Every IPTV M3U playlist must start with `#EXTM3U` on the first line. If this header is missing, most media players will reject the file.
Metadata Declaration Lines
Each stream entry begins with `#EXTINF:` followed by the duration, EPG attributes, a comma, and the channel title. The streaming URL is placed on the line below.
Global Header Options
You can configure parameters in the header line, such as `#EXTM3U url-tvg="http://guide.com/epg.xml"` to define the EPG feed for the entire list.
Linebreak Standards
M3U files support both CRLF (Windows) and LF (Unix) linebreaks. Ensure your text editor maintains consistent linebreaks to prevent parser misalignments.