How to merge segmented webvtt subtitle files and output to SRT file?

[smokeweedevryday]

How to merge a segmented webvtt subtitle file and output a single file?, m3u8 looks like this example:

#EXTM3U
#EXT-X-TARGETDURATION:6
#EXT-X-VERSION:5
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:VOD
#EXTINF:6.0,
http:/TEST.COM/0.vtt
#EXTINF:6.0,
http:/TEST.COM/540000.vtt
#EXTINF:6.0,
http:/TEST.COM/1080000.vtt
#EXTINF:6.0,
http:/TEST.COM/1620000.vtt
#EXTINF:6.0,
http:/TEST.COM/2160000.vtt
#EXTINF:6.0,
http:/TEST.COM/2700000.vtt
#EXTINF:6.0,
http:/TEST.COM/3240000.vtt
#EXTINF:6.0,
http:/TEST.COM/3780000.vtt
#EXTINF:6.0,
http:/TEST.COM/4320000.vtt
#EXTINF:6.0,
http:/TEST.COM/4860000.vtt
#EXTINF:6.0,
http:/TEST.COM/5400000.vtt
#EXTINF:6.0,
http:/TEST.COM/5940000.vtt
#EXTINF:6.0,
http:/TEST.COM/6480000.vtt
#EXTINF:6.0,
http:/TEST.COM/7020000.vtt
#EXTINF:6.0,
http:/TEST.COM/7560000.vtt
#EXTINF:6.0,
http:/TEST.COM/8100000.vtt
#EXTINF:6.0,
http:/TEST.COM/8640000.vtt
#EXTINF:6.0,
http:/TEST.COM/9180000.vtt
#EXTINF:6.0,
http:/TEST.COM/9720000.vtt
#EXTINF:6.0,
http:/TEST.COM/10260000.vtt
#EXTINF:6.0,
http:/TEST.COM/10800000.vtt
#EXTINF:6.0,
http:/TEST.COM/11340000.vtt
#EXTINF:6.0,
http:/TEST.COM/11880000.vtt
#EXT-X-ENDLIST 

how can i output srt according the EXTINF? i need it with ffmpeg code