Opened 11 years ago

Closed 11 years ago

Last modified 11 years ago

#8348 closed defect (invalid)

DVB-T subtitles not displayed in H264/AAC stream

Reported by: jeppe@… Owned by: Isaac Richards
Priority: minor Milestone: unknown
Component: MythTV - General Version: 0.22-fixes
Severity: medium Keywords:
Cc: Ticket locked: no


Danish TV recently switched to use DVB-T subtitles on all new MPEG4 channels. Myth doesn't seem to recognize these during playback (No "Select subtitle" menu in the OSD).

This is on MythFrontend version: branches/release-0-22-fixes [23710]

An example file is available here (130mb)

This plays back fine in VLC, and here's the output from ffmpeg:

Input #0, mpegts, from 'Colosseum.mpg':
  Duration: 07:22:19.75, start: 11501.228189, bitrate: 42 kb/s
  Program 1 
    Stream #0.0[0x83f]: Video: h264, yuv420p, 704x576 [PAR 16:11 DAR 16:9], 25 tbr, 90k tbn, 50 tbc
    Stream #0.1[0x857](dan): Subtitle: dvbsub
    Stream #0.2[0x858](dan): Subtitle: dvbsub

And this is the output from playback:

2010-04-14 22:03:46.037 AFD: Using ffmpeg for video decoding
2010-04-14 22:03:46.037 AFD: Looking for decoder for H264
2010-04-14 22:03:46.037 AFD: Opened codec 0x2e929c00, id(H264) type(Video)
2010-04-14 22:03:46.037 AFD: Stream #2, has id 0x849 codec id AAC/LATM, type Audio, bitrate 0 at 0x2c1ae010
2010-04-14 22:03:46.037 AFD: codec AAC/LATM has 2 channels
2010-04-14 22:03:46.037 AFD: Looking for decoder for AAC/LATM
2010-04-14 22:03:46.037 AFD: Opened codec 0x2ee6d000, id(AAC/LATM) type(Audio)
2010-04-14 22:03:46.037 AFD: Audio Track #1 is A/V stream #2 and has 2 channels in the Danish language(6578542).
2010-04-14 22:03:46.037 RingBuf(myth:// CalcReadAheadThresh(0 KB)
			 -> threshhold(64 KB) min read(0 KB) blk size(32 KB)
2010-04-14 22:03:46.038 AFD: Selected track 1: Danish LIBFAAD_LATM 2ch (A/V Stream #2)
2010-04-14 22:03:46.038 AFD: Initializing audio parms from audio track #1
2010-04-14 22:03:46.038 AFD: Audio format changed 
			from id(NONE)    -1Hz -1ch   0bps    ; id(NONE)    -1Hz -1ch   0bps   
			to   id(AAC/LATM) 48000Hz  2ch  16bps    ; id(AAC/LATM) 48000Hz  2ch  16bps

Change History (2)

comment:1 Changed 11 years ago by robertm

Resolution: invalid
Status: newclosed

Two reports of this sample working fine on .23-fixes (by pressing T), suggest an upgrade if the subtitles are critical to you.

comment:2 Changed 11 years ago by robertm

And on further review of the ticket, it sounds like you're trying to find them in the menu instead of pressing "T".

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