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• avformat/hlsenc : add var_stream_map LANGUAGE field string parameter

  23 janvier 2019, par Steven Liu

  avformat/hlsenc : add var_stream_map LANGUAGE field string parameter
  use a:0,agroup:aud_low,default:Yes,language:CHN a:1,agroup:aud_low,language:ENG
  
          a:2,agroup:aud_high,default:YesYes,language:CHN a:3,agroup:aud_high,language:ENG
  
          v:0,agroup:aud_low v:1,agroup:aud_high
  
          create master m3u8 list.
  result :
  
  EXTM3U
  
  EXT-X-VERSION:3
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_0",DEFAULT=YES,LANGUAGE="CHN",URI="out_0.m3u8"
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_1",DEFAULT=NO,LANGUAGE="ENG",URI="out_1.m3u8"
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_2",DEFAULT=YES,LANGUAGE="CHN",URI="out_2.m3u8"
  
  EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_3",DEFAULT=NO,LANGUAGE="ENG",URI="out_3.m3u8"
  
  EXT-X-STREAM-INF:BANDWIDTH=1170400,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_low"
  
  out_4.m3u8
  
  EXT-X-STREAM-INF:BANDWIDTH=3440800,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_high"
  
  out_5.m3u8
  Signed-off-by : Steven Liu <lq@chinaffmpeg.org>
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/dashenc.c
  • [DH] libavformat/hlsenc.c
  • [DH] libavformat/hlsplaylist.c
  • [DH] libavformat/hlsplaylist.h

• How to add a comment into a mp3, in a specific language, using ffmpeg [duplicate]

  20 août 2021, par Valery Letroye

  I am fighting with ffmpeg to add a comment in french into a mp3. I want that comment to be displayed within the tab "Details" of the "Properties" window that I can open from Windows Explorer (which is using French as "Display Language").

  


  Ie. : I want this view :

  


  

  


  Unfortunately, I can't find how to do it.

  


  In the illustration above, I did edit the comment directly from the "Details" tag of the "Properties" window. If I look at the Exif info of the file with "exiftool test.mp3", I see

  


  Comment (fra)                   : Test Comment FR


  


  Next, if I open the file test.mp3 with mp3tag (where fra is defined as my language via the Options > Advanced), I see correctly the comment :

  


  

  


  Then, if I replace that comment into "Test Comment FR - Edit", within mp3tag, and save it, here is what I get with exiftool :

  


  Comment (fra)                   : Test Comment FR - Edit
Comment                         : Test Comment FR - Edit


  


  mp3tag has updated the Exif info "Comment (fra)" and added the ID3 tag "Comment".

  


  Now, if I try to add the comment with ffmpeg with the following commands (to clean first all metadata of my previous tests) :

  


  ffmpeg -i test.mp3 -map 0 -map_metadata -1 -c copy test-blank.mp3
ffmpeg -y -i test-blank.mp3 -metadata comment="Test Comment FR - ffmpeg" -c copy test.mp3


  


  Here are the Exif info I get :

  


  User Defined Text               : (comment) Test Comment FR - ffmpeg


  


  This info is not displayed in the "Details" tab of the "Properties" window.
Notice that it is however properly displayed by mp3tag.

  


  I did try to specify the language to ffmpeg with -metadata language="fra", or to use the metadata "Comment" or "Comment (fra)" instead of "comment", but nothing helped.

  


  I am totally lost as not an expert in ID3 and ffmpeg... And I didn't find any trick on Google.
NB. : I am using ffmpeg and exiftool in a Shell console on my Synology, to convert mp4 to mp3 (
ffmpeg version 2.7.7 built with gcc 4.9.3).

  


  Is there anyone experienced with ffmpeg who could guide me ?
PS. : I am even not sure that the comment added by ffmpeg would be displayed by a "English" version of Windows...

  


  A big thx in advance !

  


  V.

  


• can i set set language of a subtitle to english forced

  22 avril 2020, par Ginso

  i have a file with 4 subtitles : german, english, german forced, and english forced. However they are shown as

  



  title 1 [English]
title 2 [German]
title 3 [English]
title 4 [German]


  



  i woud like to make the forced ones recognizable as such. Of course i could set -metadata:s:s:3 title="English forced" but then it would be shown as English forced [English] and i wonder if i could also set the language somehow so that it is called 
title 3 [English forced] or similar ?