How to convert mp4 to m3u8 with soft subtitles and audios in ffmpeg

Question

I have these files, (test.mp4 test.srt test-fr.srt ) I want to convert the video test.mp4 to m3u8 with multiple subtitles

This is the kind of m3u8 file, that am trying to generate(this example is from hls-js site)

as you can see, the subtitles and audio chunks are included to the main m3u8 file.

#EXTM3U
#EXT-X-VERSION:3

#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="Chinese",FORCED=NO,AUTOSELECT=YES,URI="media/chinese/ed.m3u8",LANGUAGE="zh"
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="French",FORCED=NO,AUTOSELECT=YES,URI="media/french/ed.m3u8",LANGUAGE="fr"

#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac",LANGUAGE="en",NAME="English",DEFAULT=YES,AUTOSELECT=YES,URI="media/b160000-english.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac",LANGUAGE="sp",NAME="Spanish",DEFAULT=NO,AUTOSELECT=YES,URI="media/b160000-spanish.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac",LANGUAGE="en",NAME="Commentary (eng)",DEFAULT=NO,AUTOSELECT=NO,URI="media/b160000-commentary.m3u8"

#EXT-X-STREAM-INF:BANDWIDTH=2962000,NAME="Main",CODECS="avc1.66.30",RESOLUTION=1280x720,AUDIO="aac",SUBTITLES="subs"
media/b2962000-video.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1427000,NAME="Main",CODECS="avc1.66.30",RESOLUTION=768x432,AUDIO="aac",SUBTITLES="subs"
media/b1427000-video.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=688000,NAME="Main",CODECS="avc1.66.30",RESOLUTION=448x252,AUDIO="aac",SUBTITLES="subs"
media/b688000-video.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=331000,NAME="Main",CODECS="avc1.66.30",RESOLUTION=284x160,AUDIO="aac",SUBTITLES="subs"
media/b331000-video.m3u8

#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs_b",NAME="Chinese",FORCED=NO,AUTOSELECT=YES,URI="media_b/chinese/ed.m3u8",LANGUAGE="zh"
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs_b",NAME="French",FORCED=NO,AUTOSELECT=YES,URI="media_b/french/ed.m3u8",LANGUAGE="fr"

#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac_b",LANGUAGE="en",NAME="English",DEFAULT=YES,AUTOSELECT=YES,URI="media_b/b160000-english.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac_b",LANGUAGE="sp",NAME="Spanish",DEFAULT=NO,AUTOSELECT=YES,URI="media_b/b160000-spanish.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac_b",LANGUAGE="en",NAME="Commentary (eng)",DEFAULT=NO,AUTOSELECT=NO,URI="media_b/b160000-commentary.m3u8"

#EXT-X-STREAM-INF:BANDWIDTH=2962000,NAME="Main",CODECS="avc1.66.30",RESOLUTION=1280x720,AUDIO="aac_b",SUBTITLES="subs_b"
media_b/b2962000-video.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1427000,NAME="Main",CODECS="avc1.66.30",RESOLUTION=768x432,AUDIO="aac_b",SUBTITLES="subs_b"
media_b/b1427000-video.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=688000,NAME="Main",CODECS="avc1.66.30",RESOLUTION=448x252,AUDIO="aac_b",SUBTITLES="subs_b"
media_b/b688000-video.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=331000,NAME="Main",CODECS="avc1.66.30",RESOLUTION=284x160,AUDIO="aac_b",SUBTITLES="subs_b"
media_b/b331000-video.m3u8

I tried this command

ffmpeg -i test.mp4 -vf "subtitles=test.srt" -y test.m3u8

but it actually burned the subtitle inside the video. What is the right command that creates the m3u8 with all subtitles included inside m3u8 like in the example above? thank you.

PS:new to ffmpeg:)

UPDATE: my main goal here is to make different video players recognise the captions

PS: am developing a website for video streaming