DVB subtitles missing

[Sebu7]

Non-problematic channel:

dvbv5-zap -c adapter0-DVB-C-channels.conf "Yle TV2 HD" -p -o dvbzap_debian_yle2hd_adapterconf.ts

Code:

using demux 'dvb0.demux0'
reading channels from file 'adapter0-DVB-C-channels.conf'
tuning to 138000000 Hz
video pid 312
  dvb_set_pesfilter 312
dvb_dev_set_bufsize: buffer set to 6160384
audio pid 860
  dvb_set_pesfilter 860
Lock   (0x1f) C/N= 37.00dB UCB= 0 postBER= 0
Lock   (0x1f) C/N= 36.75dB UCB= 0 postBER= 0
Record to file 'dvbzap_debian_yle2hd_adapterconf.ts' started
^Creceived 11610504 bytes
Lock   (0x1f) Signal= -34.00dBm C/N= 37.25dB UCB= 0 postBER= 0

ffmpeg -i

Code:

Input #0, mpegts, from 'dvbzap_debian_yle2hd_adapterconf.ts':
  Duration: 00:00:11.95, start: 36498.971856, bitrate: 7770 kb/s
  Program 1501
  Program 1502
    Stream #0:0[0x138]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x35c](dan): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 448 kb/s
    Stream #0:2[0x35f](dut): Audio: ac3 (AC-3 / 0x332D4341), 0 channels, fltp (visual impaired) (descriptions)
    Stream #0:3[0x84f](fin): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
    Stream #0:4[0x850](swe): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
    Stream #0:5[0x1389](fin): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
  Program 1503
  Program 13105

TS Doctor

See attached image

So dvbzap only captures actual data for 1) video 2) first audio track (by default?) which is Danish, nothing more, no additional languages or any subtitles. I suspect this is because "dvb_set_pesfilter" in dvbzap output, only one video and one audio track is captured, for filters VIDEO_PID and AUDIO_PID in tuning details is used.

[mvallevand]

Ok that's as far as I can take this we don't have DVB here. I did have a look at the Windows file and has too many errors to play. It has teletext too which is quite different from subtitles, is that what you are looking for?

Martin

[Sebu7]

Ok that's as far as I can take this we don't have DVB here.  I did have a look at the Windows file and has too many errors to play.  It has teletext too which is quite different from subtitles, is that what you are looking for?

Martin

No I'm not interested in teletex but actual DVB subtitles. Windows recording is from virtual machine, for some reason Hauppauge dualHD does not work very well there (constant artifacts etc.), that's why I'm going Linux.

I suspect that my problem is related to these "extra" PIDs in tuning details for problematic channels, I believe NextPVR implementation does not handle these properly for some reason but of course I have no clue of your implementation. I would not like to go and see if TVHeadend has same problem since I really like NextPVR simplicity and quality.

[Sebu7]

So I did quick test with Ubuntu VM/TVHeadend/Kodi and this subtitle problem does not exist there

[sub]

I can see what's happening. I'll fix it.

[sub]

Here is an updated x64 version of DeviceHostLinux if you want to give it a go.

[Sebu7]

Here is an updated x64 version of DeviceHostLinux if you want to give it a go.

Thanks, I can confirm this fixes the issue for at least for two problematic channels I was aware of

[sub]

Great!