[FFmpeg-trac] #8946(undetermined:new): Possible regression MPEG-TS muxing multiple audio streams: f4eb7d84a7c219eac130750417e4bc2cbbff7b3f

[FFmpeg]

#8946: Possible regression MPEG-TS muxing multiple audio streams:
f4eb7d84a7c219eac130750417e4bc2cbbff7b3f
-------------------------------------+-------------------------------------
             Reporter:  keynet       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  avformat     |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Commit f4eb7d84a7c219eac130750417e4bc2cbbff7b3f causes a problem for some
 players in my testing, e.g. Kodi and SMplayer (mpv) unable to recognise a
 second audio stream that starts some time after the primary audio. The
 test source was transcoded from the full HD stream to 1280x720 by ffmpeg.

 Use case: Off-air recording with an HE-AACv2 Audio Description sound track
 that starts for example 20s or so later than the AAC stream.  A big file,
 25M+ is needed to test this (hence probesize value).

 Reverting the above commit on current git restores expected functionality
 with Kodi. Transcoding or a simple remux like this fixes the file:
 {{{
 ffmpeg -y -probesize 250M -analyzeduration 600M -copytb 1 -i 1280.ts -c
 copy -map 0 00001.ts

 ffmpeg version N-99733-g9a57ff2b8f Copyright (c) 2000-2020 the FFmpeg
 developers
   built with gcc 7 (SUSE Linux)
   configuration: --extra-cflags='-fmessage-length=0 -grecord-gcc-switches
 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables
 -fasynchronous-unwind-tables -fstack-clash-protection -g' --optflags
 ='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2
 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -fstack-
 clash-protection -g' --disable-htmlpages --disable-doc --enable-libx264
 --enable-libopus --enable-libopenjpeg --enable-libwebp --enable-gpl
 --enable-libx265 --enable-libfdk_aac --enable-libmp3lame --enable-libsoxr
 --enable-libaom --enable-nonfree --disable-debug --logfile=log --disable-
 ffplay --disable-ffprobe
   libavutil      56. 60.100 / 56. 60.100
   libavcodec     58.112.100 / 58.112.100
   libavformat    58. 63.100 / 58. 63.100
   libavdevice    58. 11.102 / 58. 11.102
   libavfilter     7. 88.100 /  7. 88.100
   libswscale      5.  8.100 /  5.  8.100
   libswresample   3.  8.100 /  3.  8.100
   libpostproc    55.  8.100 / 55.  8.100
 Input #0, mpegts, from '1280.ts':
   Duration: 01:55:52.51, start: 59739.288022, bitrate: 2059 kb/s
   Program 1
     Metadata:
       service_name    : Service01
       service_provider: FFmpeg
     Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(top first), 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn,
 50 tbc
     Stream #0:1[0x101](eng): Audio: aac_latm (LC) ([17][0][0][0] /
 0x0011), 48000 Hz, stereo, fltp
     Stream #0:2[0x102](eng): Audio: aac_latm (HE-AACv2) ([17][0][0][0] /
 0x0011), 48000 Hz, stereo, fltp
     Stream #0:3[0x103](eng): Subtitle: dvb_subtitle ([6][0][0][0] /
 0x0006)

 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8946>
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