Extract DVB subtitles (or teletext?)

[morningluck]

Hello,

I am quite the amateur when it comes to video and subtitles.

When I open a video in VLC, it shows 6 subtitles track. 2 tracks that MKVToolNix and CCExtractor recognise, and 4 others that they don't. Alas, that one I want to extract is one of those. I don't know how to figure out what sort of subtitles they are.
Here how VLC presents them:

[Attachment 92674 - Click to enlarge]

I first thought they were teletext but as I said, I'm quite the amateur so I'm not sure. I've come across the term DVB subtitles as well.

I've also seen ffmpeg been recommended but I'll admit I really struggle with command lines. I cannot begin to fathom what to write to figure out how to get the information and how to extract the subs/teletext/whatever they are.

The reason I want to convert it to a srt file is to change their appearance in VLC because they are not easy to read at all in this format.

Hope you can help

[cholla]

The process can be difficult.The actual subtitles are usually fairly easy to extract.
Those are the two that VLC recognizes.
The others are closed captions not subtitles. I have never had success extracting those.

MKVToolNix can do this.
Just uncheck everything but the subtitle you want.Then multiplex.
The subtitle will have .mks as an extension.
That should work if using MKVToolNix to add it back to a video.
If not then use SubTitle Edit to convert the .mks to another format.

[ProWo]

These could be EIA 608/708 closed captions.
You can try extracting them using clever FFmpeg-GUI.
Load your video file, click “Closed Captions,” and then click “Extract.”
If that works, repeat the process with the next index number 0, then 1.

[Subtitles]

If you suspect that there are teletext subtitles, try using TS Doctor
You will get 30 days full function
In the setup menus, deal with teletext options
Also open the video in Subtitle Edit and see what options for subtitles you will get.

[morningluck]

These could be EIA 608/708 closed captions.
You can try extracting them using clever FFmpeg-GUI.
Load your video file, click “Closed Captions,” and then click “Extract.”
If that works, repeat the process with the next index number 0, then 1.

Thank you so much!! This has worked!
They don't appear in the streams but extracting the CC worked.

[pandy]

DVB subtitles can be tricky - there is at least few types of DVB subtitles - they can be embedded as RAW VBI data, they can be embedded as separate Elementary Streams (various datatypes), they can be embedded as a series of images (similarly to DVD subtitles) and they can be embedded as a part of private data in video elementary stream - ATSC world is usually way simpler and CC type of subtitles is the most popular one.

[netmask56]

Have you tried Inviska MKV Extract