[FFmpeg-user] Convert srt Subtitle file into ttml subtitle
Pierre-Anthony Lemieux
pal at sandflow.com
Wed Oct 6 19:37:42 EEST 2021
On Wed, Oct 6, 2021 at 8:55 AM Christian Ebert <bcc at phloxic.productions> wrote:
>
> * R J on Tuesday, October 05, 2021 at 16:05:16 +0530:
> > I want to convert a .srt file into ttml file.
> >
> > I tried using below command.
> >
> > ffmpeg -i my_srt.srt -y srt-to-ttml.xml -v verbose
>
> How is ffmpeg supposed to know to which format you intend to
> convert?
>
> Either
>
> ffmpeg -i my_srt.srt -f ttml srt-to-ttml.xml
>
> or
>
> ffmpeg -i my_srt.srt srt-to-ttml.ttml
BTW, this results in a TTML file (at least in 4.4) that is missing
positioning information, resulting in the subs being positioned at the
top left of the video. For example,
1
00:00:04,700 --> 00:00:06,736
where are you going so early?
results in:
<?xml version="1.0" encoding="utf-8"?>
<tt
xmlns="http://www.w3.org/ns/ttml"
xmlns:ttm="http://www.w3.org/ns/ttml#metadata"
xmlns:tts="http://www.w3.org/ns/ttml#styling"
xml:lang="">
<body>
<div>
<p
begin="00:00:04.700"
end="00:00:06.736">where are you going so early?</p>
</div>
</body>
</tt>
which renders to today.png instead of centered text at the bottom at
desired.png, which is typically the expected output.
>
> --
> Szenen aus Georg Büchners Woyzeck
> (1986, schwarz-weiß, 15 Min.)
> https://phloxic.productions/blv/woyzeck
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