Weird subtitles (CC608)

[ARKansans]

I've tried googling this but can't find anything about it, or actually I cant get any results regarding this exact problem.
So the problem is, I get a *.mkv file and watch it in Plex, Subtitles are always default on, it's beginning to become
more and more problem, and the problem is that there is a subtitle file in those *.mkv files called

Unknown (Closed Captions)
or
English (Closed Captions)

and they are either empty or contain missing letters and words, so completely useless.
In VLC they show up, and often show up to 4 times.
When I use tools like Mediainfo, MKVToolnix, gMKVExtractGui and Subtitle Edit I can only see the SRT subtitle, witch is the,
correct one, but that closed captions one wont show up.
In handbrake that subtitle shows up, usually as

English, Closed Caption [CC608]

So my question is, what on earth are those completely useless subtitles and what might be the reason they are packed with the *.MKV files?
Also, is there no other way to remove them without having to re-encode the *.MKV files with handbrake, and is there
no option to force handbrake to not embed them by default?

[davexnet]

To remove it, drop the file into MkvToolNix GUI, deselect the subs,
write out the new file

[ARKansans]

Hi davexnet, as I wrote above I can only see the SRT sub file and not the Closed Captioned one.
Below is the same *.MKV file in each of the programs.

[Attachment 63996 - Click to enlarge]

[Attachment 63998 - Click to enlarge]

[davexnet]

Open the file in Avidemux, leave audio and video to "copy" and choose mkv muxer.
Write out the new file. Did the mysterious CC subtitles make it to the new file?

See if there is anything useful here
https://stackoverflow.com/questions/3169910/can-ffmpeg-extract-closed-caption-data

[aedipuss]

my guess would be the cc's were timed text (ttxt) and embedded into the mp4 before it was converted to mkv. you might have to demux the mkv and then use a a mp4 muxer to demux the parts. My MP4Box GUI might work.

[ARKansans]

Open the file in Avidemux, leave audio and video to "copy" and choose mkv muxer.
Write out the new file. Did the mysterious CC subtitles make it to the new file?

Yeah they did, I put the new video file into handbrake and the CC was there still.
I also tried gMKVExtractGUI, extracted the audio and video only and remuxed them with
mkvtoolnix-gui, the CC showed up in handbrake.
But if I unselect that CC in handbrake and re encode the file, then the CC is removed.

[ARKansans]

my guess would be the cc's were timed text (ttxt) and embedded into the mp4 before it was converted to mkv. you might have to demux the mkv and then use a a mp4 muxer to demux the parts. My MP4Box GUI might work.

That still wont explain why on earth that sometimes the CC's are empty or are missing letters in words and even missing whole words.
I found out that just re-encoding them removes the CC and is much less of a hassle.

[aedipuss]

when you don't have a clue of who made or how it was made, you are asking for help with pirated material. it's not allowed here.

[jagabo]

You have CEA-608 closed captions.

https://en.wikipedia.org/wiki/EIA-608
https://en.wikipedia.org/wiki/CEA-708

They are muxed within the video stream, not as a separate stream in the MKV file. ffmpeg can remove them.

https://forum.videohelp.com/threads/390217-Deleting-CEA-608-(EIA-608)-captions-from-a-...le#post2561602

[ARKansans]

when you don't have a clue of who made or how it was made, you are asking for help with pirated material. it's not allowed here.

Those are show's that are showed in my country state TV, according to my country law, it's allowed to make copies from
the TV for personal use, and allowed to lend to closest family members. Also it's allowed to download materials from the internet according to law
but it's strictly forbidden to share materials trough the internet (Makes sense right?....)
So instead for me to record the shows my self, I get them from another place with subtitles.
So if that's not allowed here I apologise for that, I do buy all my BluRay's and rip them my self (which is also allowed according to our laws)

[ARKansans]

You have CEA-608 closed captions.

https://en.wikipedia.org/wiki/EIA-608
https://en.wikipedia.org/wiki/CEA-708

They are muxed within the video stream, not as a separate stream in the MKV file. ffmpeg can remove them.

https://forum.videohelp.com/threads/390217-Deleting-CEA-608-(EIA-608)-captions-from-a-...le#post2561602

Thank you very much, explains a lot.

[usually_quiet]

when you don't have a clue of who made or how it was made, you are asking for help with pirated material. it's not allowed here.

I do buy all my BluRay's and rip them my self (which is also allowed according to our laws)

That isn't actually true for the USA. Technically, breaking the copy protection on Blu-ray and DVD is illegal under the Digital Millenium Copyright Act and it is definitely illegal to produce or sell ripping software in the USA. However, as long as you don't share your rips or download someone else's rips from sharing sites you are unlikely to be caught.

[ARKansans]

when you don't have a clue of who made or how it was made, you are asking for help with pirated material. it's not allowed here.

I do buy all my BluRay's and rip them my self (which is also allowed according to our laws)

That isn't actually true for the USA. Technically, breaking the copy protection on Blu-ray and DVD is illegal under the Digital Millenium Copyright Act and it is definitely illegal to produce or sell ripping software in the USA. However, as long as you don't share your rips or download someone else's rips from sharing sites you are unlikely to be caught.

Well I've no idea how USA laws work, but I'm in Iceland and follow Icelandic laws. We are allowed to make copies off our media, as when we purchase the
media it becomes our property. The copies are then used instead of the original media to preserve the original media, as scratches are
impossible to avoid, especially with kids around. And ofcourse sharing/selling/giving etc. is against the laws (except for the closest family member, which is a grey zone btw)
I do understand why you thought I was from USA, because of my name, but the name is arrived from the PC game ARK and ansans is an icelandic word.
And believe me I don't share my media anywhere, the media is costly for me and there are already far better rips out there easily accessible then I have at home.