How to load ttml subtitles?

[hhh333]

Hi,
I downloaded mp4 file with separate ttml type subtitle file. When trying to manually load it I don't get any reaction (no error or load) when I select the file and click OK. When searching for the file I need to change to "All Files" from "All supported files".
Is there any way how to load the file or do I have to convert it to srt or other format?
Thanks.

[TheDreadPirate]

Jellyfin's documentation doesn't mention ttml subtitles, so I am assuming no.

https://jellyfin.org/docs/general/client...dec-tables

[bitmap]

You can use ffmpeg to convert ttml to srt.

Code:

ffmpeg -i file.mp4 -c:s srt file.en.srt

I assume they're embedded. Since Jellyfin likes external files better anyways, this is the way to do it. Replace "en" with the two-letter language code for whatever language you're pulling out. If it's not the first ttml stream, you'll have to map it, which is a different thing altogether.

[TheDreadPirate]

I downloaded mp4 file with ttml type subtitle file. 

I'm assuming it is an external file.

[bitmap]

I downloaded mp4 file with ttml type subtitle file. 

I'm assuming it is an external file.

My bad.

Code:

ffmpeg -i file.ttml -c srt file.en.srt

Should work just the same.

[TheDreadPirate]

I searched through the code and there APPEARS to be support for ttml.

Make sure your ttml file conforms with the file name documentation for external subs.

https://jellyfin.org/docs/general/server...rnal-files

[hhh333]

I downloaded mp4 file with ttml type subtitle file. 

I'm assuming it is an external file.

My bad.

Code:

ffmpeg -i file.ttml -c srt file.en.srt

Should work just the same.

Thanks. I will try this.
I also updated the post to make it clear that it's a separate file

[hhh333]

I searched through the code and there APPEARS to be support for ttml.

Make sure your ttml file conforms with the file name documentation for external subs.

https://jellyfin.org/docs/general/server...rnal-files

As mentioned, I tried to add them manually so I didn't even hope that they will load on their own based on the name.

Feel free to try it. I used yt-dlp to download both video and subtitles file.

[hhh333]

I downloaded mp4 file with ttml type subtitle file. 

I'm assuming it is an external file.

My bad.

Code:

ffmpeg -i file.ttml -c srt file.en.srt

Should work just the same.

I get

Code:

Invalid data found when processing input

when trying the command. I also tried the same command with different ttml file and I got the same issue. I run it on RPi and am on the latest version. Also I couldn't find this in ffmpeg Documentation. I tried to list subs with ytdlp but it offers only the one file. I also tried python script with webvtt and pycaption but none worked so far.

[hhh333]

In the end the https://pypi.org/project/ttconv/ library worked with the example command

Code:

python src/main/python/ttconv/tt.py convert -i src/test/resources/scc/mix-rows-roll-up.scc -o build/mix-rows-roll-up.ttml

Of course changing input to ttml and output to srt