[FFmpeg-user] ffmpeg segmenter | Unable to map audio language metadata

[tarun singhal]

Hello Team,

I have a video TS file which has audio language metadata as "english"
available in it. When I use ffmpeg to segment thatsource video and create
m3u8 HLS package, the audio language metadata is missing.

I have tried all the options including -metadata and -map_metadata . But
was unsuccessfull.

#1 Source video info
>ffmpegv3 -i out.ts
ffmpeg version N-61286-gdbc3e11 Copyright (c) 2000-2014 the FFmpeg
developers
  built on Mar 11 2014 22:06:56 with gcc 4.8.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
--ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab
--enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavp
ack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
--enable
-zlib
  libavutil      52. 66.101 / 52. 66.101
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 34.100 / 55. 34.100
  libavdevice    55. 11.100 / 55. 11.100
  libavfilter     4.  3.100 /  4.  3.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Input #0, mpegts, from 'out.ts':
  Duration: 00:00:10.67, start: 1.400000, bitrate: 1345 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
    Stream #0:0[0x100](eng): Audio: aac ([15][0][0][0] / 0x000F), 44100 Hz,
ster
eo, fltp, 72 kb/s
    Stream #0:1[0x101]: Video: h264 (Main) ([27][0][0][0] / 0x001B),
yuv420p, 86
4x480 [SAR 1:1 DAR 9:5], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
At least one output file must be specified

#2 ffmpeg command console output

C:\Users\t.singhal\Documents\trash>ffmpegV3.exe -re -i out.ts -codec copy
-map 0
 -f segment -segment_list
"Airplane_II_The_Sequel_1_20150501_1972772_HD_1264.m3u
8" -segment_list_flags +cache -segment_list_type hls -map_metadata:s:a 0:g
-segm
ent_time 2 "Airplane_II_The_Sequel_1_20150501_1972772_HD_1264_%06d.ts"
ffmpeg version N-61286-gdbc3e11 Copyright (c) 2000-2014 the FFmpeg
developers
  built on Mar 11 2014 22:06:56 with gcc 4.8.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca
--enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
--ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab
--enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavp
ack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
--enable
-zlib
  libavutil      52. 66.101 / 52. 66.101
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 34.100 / 55. 34.100
  libavdevice    55. 11.100 / 55. 11.100
  libavfilter     4.  3.100 /  4.  3.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Input #0, mpegts, from 'out.ts':
  Duration: 00:00:10.67, start: 1.400000, bitrate: 1345 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
    Stream #0:0[0x100](eng): Audio: aac ([15][0][0][0] / 0x000F), 44100 Hz,
ster
eo, fltp, 72 kb/s
    Stream #0:1[0x101]: Video: h264 (Main) ([27][0][0][0] / 0x001B),
yuv420p, 86
4x480 [SAR 1:1 DAR 9:5], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Output #0, segment, to
'Airplane_II_The_Sequel_1_20150501_1972772_HD_1264_%06d.t
s':
  Metadata:
    encoder         : Lavf55.34.100
    Stream #0:0: Audio: aac ([15][0][0][0] / 0x000F), 44100 Hz, stereo, 72
kb/s
    Stream #0:1: Video: h264 ([27][0][0][0] / 0x001B), yuv420p, 864x480
[SAR 1:1
 DAR 9:5], q=2-31, 29.97 fps, 90k tbn, 29.97 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=  320 fps= 30 q=-1.0 Lsize=N/A time=00:00:10.70 bitrate=N/A
video:1500kB audio:88kB subtitle:0 data:0 global headers:0kB muxing
overhead -10
0.001350%


If you see in the Output #0 section on the console output, you can clearly
see that the audio language metadata is missing. Kindly help me on how to
get audio language metadata mapped to the output.



Regards,
Tarun Singhal

Senior Software Engineer

Accenture - India