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• github actions ffmpeg gem cannot find ffprobe

  27 octobre 2022, par Ilovebathroomlights

  so, we have been using a gem called streamio-ffmpeg, and it has been working well. We have been using github actions to to integration and E2E testing for our front end. We also had to add python for another dependency we are using. now, when we run the E2E suite on github actions, streamio-ffmpeg cannot find the ffprobe binary since python has also been installed on the actions runner.

  


  we get the following message :

  


  Body: Puma caught this error: No such file or directory - the ffprobe binary could not be found in /home/runner/work/folder_name/another_folder_name/server/vendor/bundle/ruby/2.7.0/bin:/opt/hostedtoolcache/Python/3.10.8/x64/bin:/opt/hostedtoolcache/Python/3.10.8/x64:/opt/hostedtoolcache/Ruby/2.7.6/x64/bin:/home/runner/.local/bin:/opt/pipx_bin:/home/runner/.cargo/bin:/home/runner/.config/composer/vendor/bin:/usr/local/.ghcup/bin:/home/runner/.dotnet/tools:/snap/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games (Errno::ENOENT)


  


  and streamio-ffmpeg says :

  


  Specify the path to ffmpeg
By default, the gem assumes that the ffmpeg binary is available in the execution path and named ffmpeg and so will run commands that look something like ffmpeg -i /path/to/input.file .... Use the FFMPEG.ffmpeg_binary setter to specify the full path to the binary if necessary:

FFMPEG.ffmpeg_binary = '/usr/local/bin/ffmpeg'


  


  so, how can i find out where ffprobe binary is and tell github actions this information ?? I have tried manually installing ffmpeg within the github actions runner but this does not help.

  


• Piping cURL output to FFmpeg doesn't work with mp4 files

  8 novembre 2015, par Konstantin

  I would like to pipe cURL output to FFmpeg the following way in my Ruby script to strip off metadata, chapters and maybe set other metadata too in the future :

  #!/usr/bin/ruby
  
  url=ARGV[0]
  
  
  
  fname=url.split("/").last
  
  extension=File.extname(fname)
  
  options=""
  
  case extension 
  
    when /mp4/i
  
      format="mp4"
  
      options=" -movflags frag_keyframe+empty_moov "
  
    when /avi/i
  
      format="avi"
  
    when /mkv/i
  
      format="matroska"
  
    when /wmv/i
  
      format="asf"
  
    else
  
      format="matroska"
  
   end
  
  
  
  cmd=%Q{ curl -b cookie-file.txt #{url} -L -o - | ffmpeg -y -i - -map 0:v -map 0:a -c:v copy -c:a:0 copy -map_metadata -1 -map_chapters -1 #{options} -f #{format} - | cat > #{fname} }
  
  
  
  system cmd

  When the url (ARGV[0]) points to an .avi, .wmv or .mkv file the script do its job. However when it points to an .mp4 or .mov file it doesn’t work, because the input isn’t seekable and FFmpeg at first try to read the whole input. When url points to an mp4 file, output to stdout even doesn’t work, only when options " -movflags frag_keyframe+empty_moov " is used for the output format. Otherwise I got an error message : "muxer does not support non seekable output". Last cat command is needed because this command pipe will work in a CGI script, and will write its output to STDOUT with appropriate HTTP headers. What options should I use for the input pipe to make my script work with mp4 files too ?

• How to change ffmpeg filters on the fly

  28 avril 2015, par wie

  Is it possible with ffmpeg, on the commandline, to change filters such as brightness, saturation or gamma, while ffmpeg is running, from outside ffmpeg (e.g. from a php/node/ruby script) ? (on the fly / dynamically)