multi lang, each cc into a new file

[december-soul]

If i have an DVB recording with more then one cc i would like to extract each cc into a new file.

like:

arte_multiaudio_deu.srt
arte_multiaudio_fra.srt

is there a way to auto handle multi cc video files?
This should work without multi times -o1 .. -o2 ..
I don't known how many dvb_subtitle are available.
So i want to start the ccextrator for each dvb recording without
pre-check the number of subtitles.

Here my testfile.

https://www.dropbox.com/s/5oaqnjgqq1cqzky/arte_multiaudio.ts?dl=0
It containts
Input #0, mpegts, from 'arte_multiaudio.ts':
Duration: 00:02:13.36, start: 1.400000, bitrate: 1612 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 320x240 [SAR 4:3 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
Stream #0:10x101: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 192 kb/s
Stream #0:20x102: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 192 kb/s
Stream #0:30x103: Subtitle: dvb_teletext ([6][0][0][0] / 0x0006), 492x250
Stream #0:40x104: Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006) (hearing impaired)
Stream #0:50x105: Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 448 kb/s
Stream #0:60x106: Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006) (hearing impaired)

I would like to extract 0:4 and 0:6.

regards
DS

[sidgairo18]

@cfsmp3 I would like to work on this.

[cfsmp3]

go for it

…

On Sun, Jan 22, 2017 at 1:24 AM, Siddhartha Gairola < ***@***.***> wrote: @cfsmp3 <https://github.com/cfsmp3> I would like to work on this. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#447 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFrJ2ZKxJcjG6aIhtdSHO9pcwhYYzkyCks5rUyBagaJpZM4K--KM> .

[december-soul]

any news for that?

[pandeykartikey]

@cfsmp3 I would like to have a go at this issue

[cfsmp3]

@kartik-25 by all means go for it.

[NilsIrl]

I was unable to see the German subtitles in VLC.

They can be selected but nothing shows up.

[Rahul-2k4]

Hi everyone,

I’ve been working on exactly this use case. I implemented a solution that automatically extracts each DVB subtitle stream into its own output file, without requiring multiple -o runs or pre-knowing the number of subtitle streams.

The approach works by:
Discovering all DVB subtitle streams from the PMT (PID + language).
Creating a separate decoding pipeline per subtitle PID, each with its own decoder, timing context, encoder, and output file.
Generating filenames automatically using language / PID (e.g. arte_multiaudio_deu.srt, arte_multiaudio_fra.srt).
Preserving existing behavior when the feature is not enabled.

This is exposed via a new flag:
--split-dvb-subs
So running CCExtractor once on a file like your arte_multiaudio.ts will extract both subtitle streams (0:4 and 0:6) into separate files automatically.

I’m preparing a PR that implements this safely (no global state, lazy init, clean shutdown). I’ll link it here once opened for review.
Thanks for the detailed example — it directly matches the test case I used.