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Re: Video subtitles
From: |
Pierre Neidhardt |
Subject: |
Re: Video subtitles |
Date: |
Thu, 20 Dec 2018 08:46:57 +0100 |
User-agent: |
mu4e 1.0; emacs 26.1 |
Hi Laura,
> I find a solution for not getting the whole text of the subtitle at
> once, that is creating each svg/cli session/whatever
> appears-in-the-video-if-needed with their audio and subtitle
> separately and glue every piece of video as a last step with ffmpeg.
> Apparently, that is possible according to
> https://trac.ffmpeg.org/wiki/Concatenate - have not tried it yet.
> However, I don't know if, in case of wanting to have the subtitles
> separately - not hardsubs- in this latter case if it is possible to
> concatenate them and use them outside the video.
I've done this many times and it works very well. Off the top of my head,
something like
--8<---------------cut here---------------start------------->8---
ffmpeg -i movie.mkv -i sub1.usf -i sub2.usf -map 0 -c:s copy -c:v copy -c:a
copy output.mkv
--8<---------------cut here---------------end--------------->8---
should cut it.
I would not recommend hard-subbing. It's less flexible and does not allow for
multiple languages. Instead, you can use the .mkv format which allows for
embedding multiple subtitles, choosing a default subtitle, and finally leaves it
to the user to disable them when playing.
Cheers!
--
Pierre Neidhardt
https://ambrevar.xyz/
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