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• How to get language for embedded subtitles in video file using FFMPEG libraries

  18 septembre 2024, par helgovic

  I have seen lots of examples on how to get the language codes using the command line interface, but how do you get them using the libraries ?

  


• What's the most elegant way to get the language codes from an MKV file with multiple audio tracks ?

  30 janvier 2017, par WackGet

  I need a way to get the language codes from MKV files which have multiple audio tracks.

  ffmpeg produces output which I could then filter using regular expressions but it doesn’t seem very elegant :

  $ ffmpeg -i file.mkv 2>&1 | grep Audio
  
  Stream #0:1(eng): Audio: mp2, 48000 Hz, stereo, s16, 192 kb/s (default)
  
  Stream #0:2(nar): Audio: mp2, 48000 Hz, mono, s16, 64 kb/s (default)

  mediainfo has the ability to extract language information but in files with multiple tracks, it concatenates the codes into a single string :

  $ mediainfo file.mkv --inform="Audio;%Language%"  
  
  ennar

  Is there a tool or command which will return language codes for multiple tracks in a nicer way, or a tool which would let me specify a track number and return the language code for that track only ?

• Extract subtitle by language code via ffmpeg

  7 mai 2023, par TrustFound

  I have a simple task - extract subtitle for exact language from tvshows.
For example, I want to extract English subtitles from Netflix's show.
As you know there're a few different types of subtitles : forced, full and SDH.
So I want to extract all of them if it has eng language code.

  


  To extract 1 subtitle from file I used this code for windows :

  


  FOR %%i IN (*.mkv) DO (ffmpeg.exe -i "%%i" -map 0:s:m:language:eng -c copy "%%~ni".eng.srt)


  


  It worked fine with 1 english subtitle per file. But if it contains 2, ffmpeg shows error

  


  


  SRT supports only a single subtitles stream

  


  


  ---

  


  MI is...

  


  

  • Stream #0:2(eng) : Subtitle : subrip

  


  • Stream #0:3(eng) : Subtitle : subrip

  


  • Stream #0:4(ara) : Subtitle : subrip

  


  • ...

  


  


  ---

  


  So I should set 2 or more output files. I tried to figure out how to do this and found similar threads on reddit and stacksoverflow. They said there's no way to do this without ffprobe.
So I used ffprobe to parse all subtitle tracks and their language code.

  


  FOR %%i IN (*.mkv) DO (ffprobe -loglevel error -select_streams s -show_entries stream=index:stream_tags=language -of csv=p=0 -i %%i > subs.txt)


  


  File contains this info :

  


  

  • 2,eng

  


  • 3,eng

  


  • 4,ara

  


  • ...

  


  


  ---

  


  As I understand I should use integers and set them values 2 and 3. I want to get output like this

  


  


  

  • MovieName.2.eng.srt

  


  • MovieName.3.eng.srt

  


  


  


  If it easier to extract all subs, let it be. I tried to do this too but I dont know how to set integers and use them :(
So what I should do ?
Thanks in advance