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• OpenCv VideoWriter does no write. ffmpeg library h264 errors

  22 juillet 2012, par ar ar ar

  Hi I am using OpenCv and trying to use the VideoWriter Class.

  But I get an error.

  The error is Could not find encoder for codec id 28 : Encoder not found

  Normally it must be a ffmpeg problem. How can I check which codec is with id 28 and how can I install it ?

  I think it is causing problems to my program and I cannot get the number of frames in videos right.

  update 2: :

  I installed libavcodec-extra-53 ubuntu package and now it gives other errors.

  Any ideas why ??It seems to be pure ffmpeg problem and not OpenCv problem

  libx264 @ 0x1d9bd80] broken ffmpeg default settings detected
  
  [libx264 @ 0x1d9bd80] use an encoding preset (e.g. -vpre medium)                                                                                                                               
  
  [libx264 @ 0x1d9bd80] preset usage: -vpre <speed> -vpre <profile>                                                                                                                              
  
  [libx264 @ 0x1d9bd80] speed presets are listed in x264 --help                                                                                                                                  
  
  [libx264 @ 0x1d9bd80] profile is optional; x264 defaults to high
  
  </profile></speed>

• Pyinstaller does not include ffmpeg.exe and ffprobe.exe

  11 mars 2021, par lorenzotarquini

  I'm making a simple mp3 downloader using youtube-dl. During my tests with python, everything works, I only had a problem when I saw an error that said 'ffprobe/avprobe and ffmpeg/avconv not found, please install one', solved including ffmpeg.exe and ffprobe.exe in Scripts folder but then i wrote the exe file with pyinstaller, and i got the same error i found before, IDK how to solve it, can someone help me ?. this is the spec file generated :

  


  # -*- mode: python ; coding: utf-8 -*-

block_cipher = None


a = Analysis(['..\\..\\thedownloader_V1.py'],
             pathex=['D:\\Archivio\\Projects\\Python\\MP3_downloader\\venv\\Scripts'],
             binaries=[],
             datas=[],
             hiddenimports=[],
             hookspath=[],
             runtime_hooks=[],
             excludes=[],
             win_no_prefer_redirects=False,
             win_private_assemblies=False,
             cipher=block_cipher,
             noarchive=False)
pyz = PYZ(a.pure, a.zipped_data,
             cipher=block_cipher)
exe = EXE(pyz,
          a.scripts,
          a.binaries,
          a.zipfiles,
          a.datas,
          [],
          name='thedownloader_V1',
          debug=False,
          bootloader_ignore_signals=False,
          strip=False,
          upx=True,
          upx_exclude=[],
          runtime_tmpdir=None,
          console=True )


  


• 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