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• How to extract parts of the international conference video based on spoken language using command line [closed]

  11 février 2024, par John Paul Qiang Chen

  I have an international conference video which contains two spoken languages, i.e. the video is mixed with sentences of English and Chinese. I would like to remove the Chinese part by command line. Is there any available tools ?

  


• Pass UTF8 parameter in powershell

  13 juin 2018, par Dev_MC

  I have to use ffmpeg-normalize (https://github.com/slhck/ffmpeg-normalize) in my project.

  Everything works well except that encoding have trouble on Windows :

  $OutputEncoding = [System.Text.Encoding]::Unicode
  
  $OutputEncoding
  
  Get-WinSystemLocale
  
  pause
  
  Get-ChildItem -path "./" -recurse | foreach ($_) {
  
      if ($_.Extension -eq ".wav") { 
  
      write $_.FullName
  
       ffmpeg-normalize $_.FullName -nt peak -t -20 -o $_.FullName -f
  
       pause
  
      }
  
      if ($_.Extension -eq ".mp4") { 
  
       ffmpeg-normalize $_.FullName -c:a aac -nt peak -t -20 -o $_.FullName -f
  
      }
  
          if ($_.Extension -eq ".mp3") { 
  
       ffmpeg-normalize $_.FullName -c:a libmp3lame -nt peak -t -20 -o $_.FullName -f
  
      }
  
  }

  and here is the display

  BodyName          : utf-16
  
  EncodingName      : Unicode
  
  HeaderName        : utf-16
  
  WebName           : utf-16
  
  WindowsCodePage   : 1200
  
  IsBrowserDisplay  : False
  
  IsBrowserSave     : True
  
  IsMailNewsDisplay : False
  
  IsMailNewsSave    : False
  
  IsSingleByte      : False
  
  EncoderFallback   : System.Text.EncoderReplacementFallback
  
  DecoderFallback   : System.Text.DecoderReplacementFallback
  
  IsReadOnly        : True
  
  CodePage          : 1200
  
  
  
  Parent                         : en
  
  LCID                           : 1033
  
  KeyboardLayoutId               : 1033
  
  Name                           : en-US
  
  IetfLanguageTag                : en-US
  
  DisplayName                    : English (United States)
  
  NativeName                     : English (United States)
  
  EnglishName                    : English (United States)
  
  TwoLetterISOLanguageName       : en
  
  ThreeLetterISOLanguageName     : eng
  
  ThreeLetterWindowsLanguageName : ENU
  
  CompareInfo                    : CompareInfo - en-US
  
  TextInfo                       : TextInfo - en-US
  
  IsNeutralCulture               : False
  
  CultureTypes                   : SpecificCultures, InstalledWin32Cultures, FrameworkCultures
  
  NumberFormat                   : System.Globalization.NumberFormatInfo
  
  DateTimeFormat                 : System.Globalization.DateTimeFormatInfo
  
  Calendar                       : System.Globalization.GregorianCalendar
  
  OptionalCalendars              : {System.Globalization.GregorianCalendar, System.Globalization.GregorianCalendar}
  
  UseUserOverride                : True
  
  IsReadOnly                     : False
  
  
  
  Press Enter to continue...:
  
  C:\Users\user\Desktop\a\b\d\e\audio - Copy.wav
  
  WARNING: Output file only supports one stream. Keeping only first audio stream.
  
  Press Enter to continue...:
  
  C:\Users\user\Desktop\a\b\d\不\audio - Copy.wav
  
  ERROR: file C:\Users\user\Desktop\a\b\d\?\audio - Copy.wav does not exist
  
  Press Enter to continue...:
  
  C:\Users\user\Desktop\a\c\audio - Copy.wav
  
  WARNING: Output file only supports one stream. Keeping only first audio stream.
  
  Press Enter to continue...:

  The program works well on MacOS, so I don’t think it’s a software issue. It looks like PowerShell does not send the parameter to the program correctly.

  Do you have any ideas ?

  Thanks

• How to reinsert edited metadata stream information from the FFMETADATAFILE file ? [closed]

  6 septembre 2024, par SENYCH

  I'm working on simplifying and speeding up the process of editing video metadata for user convenience. I've successfully edited metadata streams using console commands, such as :

  


  ffmpeg -i INPUT.mp4 -map 0 -metadata:s:0 "handler_name=An other video" -metadata:s:1 "handler_name=An other audio recording in russian" -metadata:s:2 "handler_name=An other audio recording in english" -metadata:s:3 "handler_name=An other audio recording in japanese" -c copy OUTPUT.mp4


  


  However, I'd like to accomplish this through a ffmetadata file. Here's the approach I've taken :

  


  ffmpeg -t 0 -i INPUT.mp4 -map 0 -c copy -f ffmetadata ffmetadata.txt -hide_banner


  


  Original ffmetadata.txt is :

  


  ;FFMETADATA1
major_brand=isom
minor_version=512
compatible_brands=isomiso2avc1mp41
encoder=Lavf61.5.101
[STREAM]
language=und
handler_name=The best video
vendor_id=[0][0][0][0]
[STREAM]
language=rus
handler_name=The best russian language
vendor_id=[0][0][0][0]
[STREAM]
language=eng
handler_name=The best english language
vendor_id=[0][0][0][0]
[STREAM]
language=jpn
handler_name=The best japanese language
vendor_id=[0][0][0][0]


  


  Edit the ffmetadata.txt file to update the handler_name values :

  


  ;FFMETADATA1
major_brand=isom
minor_version=512
compatible_brands=isomiso2avc1mp41
encoder=Lavf61.5.101
[STREAM]
language=und
handler_name=An other video
vendor_id=[0][0][0][0]
[STREAM]
language=rus
handler_name=An other audio recording in russian
vendor_id=[0][0][0][0]
[STREAM]
language=eng
handler_name=An other audio recording in english
vendor_id=[0][0][0][0]
[STREAM]
language=jpn
handler_name=An other audio recording in japanese
vendor_id=[0][0][0][0]


  


  Attempt to apply the updated metadata from ffmetadata2.txt :

  


  C:\Users\Alexander\Videos>ffmpeg -i INPUT.mp4 -i ffmetadata2.txt -map 0:v -map 0:a -map_metadata 1 -c copy OUTPUT2.mp4 -hide_banner


  


  Despite these steps, I've noticed that only the global metadata is updated, while the metadata for each stream remains unchanged. The console output shows that metadata for each stream is not updated as expected.

  


  What am I missing ? How can I ensure that the stream-specific metadata is also updated correctly when using a ffmetadata file ?

  


  Additional Information :

  


  

  • FFmpeg version : 2024-08-26-git-98610fe95f-full_build

  


  • The ffmetadata file format and the approach I've used should be correct according to the FFmpeg documentation.

  


  


  I would greatly appreciate any recommendations or suggestions on how to solve this problem !

  


  I found a bad solution for my problem, but it still isn't ideal as it requires specifying -map_metadata:s:N 1:s:N for each stream individually, which is quite cumbersome. Is there a way to simplify this process and avoid having to set metadata for each stream separately ?

  


  The command I’m using is :

  


  C:\Users\Alexander\Videos>ffmpeg -i INPUT.mp4 -i ffmetadata2.txt -map 0 -map_metadata:s:0 1:s:0 -map_metadata:s:1 1:s:1 -map_metadata:s:2 1:s:2 -map_metadata:s:3 1:s:3 -c copy OUTPUT2.mp4 -hide_banner


  


  This works, but having to specify -map_metadata:s:N for each stream creates extra work, especially as the number of streams increases. Is there a more efficient way to handle this ?