Extract WebVTT subtitles from m3u8 playlist.

[averageuser12]

Hello guys!

I'm trying to download a video from Apple servers and I noticed that the vod_index.m3u8 file has indexed streams for subtitles in separate m3u8 streams. I tried downloading the file with FFmpeg, and it downloads the biggest video and audio but no subtitles. Is there a way to "transcode" those subtitle streams from m3u8 into an SRT file?

https://p-events-delivery.akamaized.net/2109isftrwvmiekgrjkbbhxhfbkxjkoj/m3u8/vod_index.m3u8

FFProbe output

[hls @ 0x7ff20e008200] Can't support the subtitle(uri: https://p-events-delivery.akamaized.net/2109isftrwvmiekgrjkbbhxhfbkxjkoj/vod/cc/en/en.m3u8)
[hls @ 0x7ff20e008200] Can't support the subtitle(uri: https://p-events-delivery.akamaized.net/2109isftrwvmiekgrjkbbhxhfbkxjkoj/vod/cc/es/es.m3u8)
[hls @ 0x7ff20e008200] Can't support the subtitle(uri: https://p-events-delivery.akamaized.net/2109isftrwvmiekgrjkbbhxhfbkxjkoj/vod/cc/ja/ja.m3u8)
[hls @ 0x7ff20e008200] Can't support the subtitle(uri: https://p-events-delivery.akamaized.net/2109isftrwvmiekgrjkbbhxhfbkxjkoj/vod/cc/ko/ko.m3u8)
[hls @ 0x7ff20e008200] Can't support the subtitle(uri: https://p-events-delivery.akamaized.net/2109isftrwvmiekgrjkbbhxhfbkxjkoj/vod/cc/ru/ru.m3u8)
[hls @ 0x7ff20e008200] Can't support the subtitle(uri: https://p-events-delivery.akamaized.net/2109isftrwvmiekgrjkbbhxhfbkxjkoj/vod/cc/zh/zh.m3u8)

[ChezBompaLawijt]

Videolink? so others can look at it

[averageuser12]

https://p-events-delivery.akamaized.net/2109isftrwvmiekgrjkbbhxhfbkxjkoj/m3u8/vod_index.m3u8

Here

[Sviests]

Just paste the subtitle URL in ffmpeg and that's it.
E.G. English subs:

ffmpeg.exe -i "https://p-events-delivery.akamaized.net/2109isftrwvmiekgrjkbbhxhfbkxjkoj/vod/cc/en/en.m3u8" output_subs_eng.srt

And it'll do the rest

Or if you put VOD url in there then use -map X:Y (where X&Y represent subtitle stream)
EDIT: it seems that there are no sub map streams showing,so you'll just have to paste the direct sub url in there