A check

M3u web player

Test instance
https://iptvnator.vercel.app/

exemple avec fichier m3u

#EXTM3U
#EXTINF:8023 (duree totale en seconde),toto.mp4
//lis secondes 1 à 13 puis 15 à 20
#EXTVLCOPT:start-time=1
#EXTVLCOPT:stop-time=13
toto.mp4
#EXTVLCOPT:start-time=15
#EXTVLCOPT:stop-time=20
toto.mp4

Avec xspf
<?xml version="1.0" encoding="UTF-8"?>
<playlist xmlns="http://xspf.org/ns/0/"; xmlns:vlc="http://www.videolan.org/vlc/playlist/ns/0/"; version="1">
<title>Liste de lecture</title>
<trackList>
<track>
<location>file:///C:/toto.mkv</location>;
<title>toto</title>
<duration>7003997</duration>
<extension application="http://www.videolan.org/vlc/playlist/0">;
<vlc:id>0</vlc:id>
<vlc:option>start-time=0</vlc:option>
                   <vlc:option>stop-time=13</vlc:option>
                   <vlc:option>some-option=100</vlc:option>  
</extension>
</track>
<track>
<location>file:///C:/toto.mkv</location>;
<title>toto</title>
<duration>7003997</duration>
<extension application="http://www.videolan.org/vlc/playlist/0">;
<vlc:id>1</vlc:id>
<vlc:option>start-time=15</vlc:option>
                   <vlc:option>stop-time=20</vlc:option>
                   <vlc:option>some-option=100</vlc:option>  
</extension>
</track>
</trackList>
<extension application="http://www.videolan.org/vlc/playlist/0">;
<vlc:item tid="0"/>
</extension>
</playlist>