First the stream must include the teletext stream. It’s a different PID than video or audio.
Second the (PVR) client must support it.
Third you must be able to enable the Teletext.
If Teletext is visible than fourth change to the correct teletext page include the subtitles.
Thanks so much but I do not use PVR … I just use CoreELEC and my laptop is the source as 192.168.0.xxx . when I see a movie I can see the sub teletext with my laptop and VLC but when I stream the same movie to my android box + CoreELEC this teletex is not visible nor available nor enabled and there is no way to enable it. He is there he is embedded in the movie I see it with windows 10 and VLC but NOT with CoreELEC which it not see him
Teletext and Subtitles are two different things. It sounds to me like you have enabled Teletext (in Settings->Player->Videos->Activate Teletext). What you want to do is activate subtitles… Play a video->Open the Context Menu->Select the Speech Bubble icon->Enable subtitles. You can set as default for all videos there too.
If I recall correctly, VLC plays subtitles for all videos in its default configuration. You have to enable them in Kodi.
I use CE 19.3 for/with T95Max+ 905x3 device … (some issue with last update I downgraded to 19.3) Nothing specific about that in the log file because this issue do not exist the teletext is just unavailable with CE
Many cea608 files are supported by CE. However still no logs so we have to keep guessing (knowing it is embedded cea608 helps) but we still don’t know the format or the version of CE you are using. Please help us help you.