[FFmpeg-user] Subtitle file from m3u8

[Moritz Barsnick]

On Sat, Mar 17, 2018 at 22:33:42 +0100, Carl Eugen Hoyos wrote:
> > But I can't find a way to download the subtitle file within the command.
> > Could you suggest me any possibilities to achieve that, even further - to
> > embed the subtitle to the video?
> 
> Afaik, mpegts does not support any type of text subtitles.

Indeed, no, you need an additional tool to create image subtitles from
text. Alas, I also recall issues with ffmpeg muxing MPEG-TS with
dvb_subtitles (e.g. once you have created them from text) - AFAIR
nothing was able to play them.

If you want to embed the given text subtitle stream (which was webvtt,
just for info), I recommend remuxing to mp4 or the likes.

> Not necessarily related:
> Is there really no scripts that downloads the ts files from a hls stream
> and concatenates them?

There is, youtube-dl. It even supports decrypting (some) in the
process. (It's easy to write a "playlist downloader" and some con"cat"
magic, but that can't decrypt out of the box, and yt-dl already
exists.)

Moritz