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Editorial Team
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Asked: 2026-05-13T18:07:57+00:00

I installed ffmpeg on my windows machine with no error message using gem install

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I installed ffmpeg on my windows machine with no error message using gem install ffmpeg. hm so did I actully install ffmpeg-ruby from here?

require 'rubygems'
require 'ffmpeg'

video = FFMPEG::InputFormat.new('alligator.mp4')

gives me 'NameError: uninitialized constant FFMPEG"

Does anybody have working ffmpeg ruby gem under windows the way it would give a length of a video file?

UPDATE: I can now see that I installed ffmpeg (not ffmpeg-ruby) but was using code sample from ffmpeg-ruby which did not work, of course.

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1 Answer

  1. Editorial Team

    Seem like you got the wrong gem.
    gem install ffmpeg –> http://gemcutter.org/gems/ffmpeg
    gem install ffmpeg-ruby –> http://gemcutter.org/gems/ffmpeg-ruby

    My guess would be that the ffmpeg-ruby version won’t install on windows (because it can’t compile ffmpeg)

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