Feature #4421

Subtitles - add support for NTSC EIA-608/708 (text subtitles)

Added by Andreas Fornberg 2 months ago. Updated 24 days ago.

Status:NewStart date:2017-06-09
Priority:NormalDue date:
Assignee:-% Done:

0%

Category:DVB
Target version:4.6

Description

Normal subtitles works fine but i can't get subtitles for hearing impaired working when using other profiles than 'pass' of some reason.
This happens on all types of subtitles what i can see.
Tried various players VLC, Kodi etc and when i check info there is no subtitle track but if i open same channel with pass profile it works.
Would be nice to get that working.

telxcc.c Magnifier (57.4 KB) Jaroslav Kysela, 2017-06-30 16:30

History

#1 Updated by Jaroslav Kysela 2 months ago

Please, give more info about the subtitle type. What does VLC say in the codec info when you use 'pass' muxer (profile)?

#2 Updated by Andreas Fornberg 2 months ago

Here is screenshot with pass profile

Here is one with matroska profile

It's same thing with HTSP and transcoding.

#3 Updated by Andreas Fornberg 2 months ago

Same thing also happens on some streams with closed captions for hearing impaired.

#4 Updated by Jaroslav Kysela 2 months ago

OK, it looks that the source for subtitles is teletext. If it's FTA channel, could you grab the .ts for the service (pass profile) - about 60 seconds (make sure that there are subtitles present) ? Attach the file to this bug.

#5 Updated by Andreas Fornberg 2 months ago

Here is a grab with pass profile

#6 Updated by Andreas Fornberg 2 months ago

Hmm says error when i upload the file.

#8 Updated by Andreas Fornberg 2 months ago

Probably it's flagged as hearing impaired or something.
Same thing with closed caption on US channels.

#9 Updated by Andreas Fornberg 2 months ago

Here is a file with US Closed Captions

https://dropfile.to/FCRuMWh

#10 Updated by Andreas Fornberg 2 months ago

I hope you got the files before they expired.

#11 Updated by Andreas Fornberg about 1 month ago

Have you been looking at this issue?

#12 Updated by Poul Kalff about 1 month ago

I'm from Denmark, we also use teletext for subtitles, and I see the same as you do.... I guess teletext is filtered in MKV..? But what do you wish to achieve? I record to .ts, then use ccextractor to extract subtitles to .srt and then mux them together to .mkv...... It's pretty cumbersome, but at least doable, and it can be automated....

#13 Updated by Poul Kalff about 1 month ago

I mean, teletext-stream is or seems to be filtered/not included when a stream is muxed into mkv by tvheadend...

#14 Updated by Jaroslav Kysela about 1 month ago

TVH should parse the TELETEXT stream and grab only TEXT subtitles.

Note for me: attached source code from ccextractor

#15 Updated by Jaroslav Kysela about 1 month ago

Please, reupload your .ts files (comment 4).

#16 Updated by Andreas Fornberg about 1 month ago

Jaroslav Kysela wrote:

Please, reupload your .ts files (comment 4).

File with Teletext that not works
https://dropfile.to/6HGQGnu

File with US Closed Caption that not works
https://dropfile.to/xtvDLBW

#17 Updated by Andreas Fornberg about 1 month ago

Uploaded to another place.
This one keeps the file for 30 days.

File with Teletext that not works
https://ufile.io/ypnma

File with US Closed Caption that not works
https://ufile.io/9xvc3

#18 Updated by Andreas Fornberg 27 days ago

Have you looked anything on this yet?

#19 Updated by Mark Clarkstone 26 days ago

Andreas Fornberg wrote:

Have you looked anything on this yet?

Just so you know & not left wondering, Jaroslav is currently away.

#21 Updated by Andreas Fornberg 26 days ago

Ok i didn't know he was away.
And to comment that other link this is not related to that.
I want support for some types of subtitles for hearing impaired that tvheadend not works.
Normal subtitles works without problems.

#22 Updated by Andreas Fornberg 26 days ago

The only way to make them work is using pass stream profile and that doesn't work with Kodi client.

#23 Updated by Andreas Fornberg 26 days ago

Mediainfo shows me this for file with closed caption.

Text #1
ID : 101 (0x65)-CC1
Menu ID : 1 (0x1)
Format : EIA-608
Muxing mode : SCTE 128 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 2mn 37s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)

Text #2
ID : 101 (0x65)-1
Menu ID : 1 (0x1)
Format : EIA-708
Muxing mode : SCTE 128 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 2mn 37s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)

#24 Updated by saen acro 26 days ago

Andreas Fornberg wrote:

Ok i didn't know he was away.
And to comment that other link this is not related to that.
I want support for some types of subtitles for hearing impaired that tvheadend not works.
Normal subtitles works without problems.

kodi support multiple subtitles are you try to switch?

#25 Updated by Andreas Fornberg 25 days ago

Problem is that there is no subtitles.
VLC with pass profile shows subtitles.
I think it's some special hearing impaired flag because subtitles works on most channels.

#26 Updated by Andreas Fornberg 25 days ago

If i play same stream with HTSP or transcoding in both Kodi or VLC it doesn't show subtitles and there is no subtitles you can select.
It's only possible with pass profile on those channels it happens on.
Read this thread from beginning and you understand more.

#27 Updated by Andreas Fornberg 25 days ago

And look at the screenshots and you will see one of them shows subtitles with pass profile and the other one not with same channel.

#28 Updated by Jaroslav Kysela 25 days ago

Ok, EIA-608 subtitles are not supported yet: https://en.wikipedia.org/wiki/EIA-608

#29 Updated by Jaroslav Kysela 25 days ago

  • Tracker changed from Bug to Feature
  • Subject changed from Subtitles to Subtitles - add support for NTSC EIA-608 (text subtitles)

#30 Updated by Andreas Fornberg 25 days ago

Jaroslav Kysela wrote:

Ok, EIA-608 subtitles are not supported yet: https://en.wikipedia.org/wiki/EIA-608

Ok but it's still a problem on SVT channels that are subtitled as screenshot shows earlier.
In that case it's Teletext.

#31 Updated by Andreas Fornberg 25 days ago

mediainfo shows both EIA-608 & EIA-708 i guess the later one is a newer standard.

#32 Updated by Jaroslav Kysela 24 days ago

  • Subject changed from Subtitles - add support for NTSC EIA-608 (text subtitles) to Subtitles - add support for NTSC EIA-608/708 (text subtitles)

#33 Updated by Jaroslav Kysela 24 days ago

  • Target version set to 4.6

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