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• calling FFMPEG from Perl AGI failing to execute system command

  21 novembre 2014, par Cody RedCloud

  I’m trying to convert and move 2 audio files that were recorded earlier in the call using ffmpeg. The code in using is :

  #Convert and move the audio
  
  $AGI->exec("system","ffmpeg|/olddir/$FILENAME.flac|/newdir/$FILENAME.wav");
  
  $AGI->exec("system","ffmpeg|/olddir/$FILENAME.flac|/newdir/$FILENAME.wav");

  When the AGI runs, this is what appears on the CLI :

      -- AGI Script Executing Application: (system) Options: (ffmpeg|/olddir/stt_P4J3v6.flac|/newdir/stt_P4J3v6.wav)
  
  WARNING[1796]: app_system.c:138 system_exec_helper: Unable to execute 'ffmpeg|/olddir/stt_P4J3v6.flac|/newdir/stt_P4J3v6.wav'

  I’m not sure why it will not execute, the same command works fine on the console.

  EDIT : retested command WITH the pipes in it and it returned weird errors. However, trying to use

  $AGI->exec("system","ffmpeg /olddir/$FILENAME.flac /newdir/$FILENAME.wav");

  only returns

  -- AGI Script Executing Application: (system) Options: (ffmpeg)

  so it’s not taking the rest of the arguments.

• Why do I get a black box when I tile pictures with -filter_complex tile=2x1 in FFmpeg ?

  19 juin 2016, par Mateusz Piotrowski

  As I was trying to write a script (which attempts to join two pictures eventually) using FFmpeg I came across a very weird behaviour.

  I’ve found a command in an accepted answer for the very same problem I had (How to join two image into one by ffmpeg ?) :

  ffmpeg -i a.jpg -i b.jpg -filter_complex scale=120:-1,tile=2x1 output.jpg

  • Input : a.jpg, b.jpg

    

  • Output : output.jpg

    

  What happened to the B cat ? Why is it missing from the output image ? I couldn’t find any information why tile=2x1 behaves like this.

• How to Include Non-Python Dependency in a Python Package Using PyProject.toml ?

  5 mai 2023, par MillerTime

  I'm developing a Python package that requires the package ffmpeg. It's automatically installed on my platform, linux, but I'd like to make this package available for other platforms as well. I'm using a pyproject.toml file to include metadata and Python dependencies, but I don't know how to add dependencies that aren't Python packages. Even if pip isn't able to install them automatically, I'd like it to give a message to the user upon instilation dictating that ffmpeg is required.

  


  [build-system]
requires = ["setuptools>=61.0.0", "wheel"]
build-backend = "setuptools.build_meta"

[project]
name = "myproject"
version = "1.0"
dependencies = [
    "python-package-one",
    "python-package-two",
    "python-package-three"
]

[tool.setuptools]
packages = [
    "myproject",
    "myproject.subpackage"
]


  


  I had found a python library called pyffmpeg that provided ffmpeg binaries, but it has weird failures and is unreliable, so I'm moving away from it. My question is, how can I include ffmpeg as a dependency ? Alternatively, I'd like to know about any other Python packages that ship with ffmpeg already installed, like the one I tried, although the other solution is my preference. Thanks very much !