RVideo

RVideo 是 一个调用unix命令来对视频和音频文件进行处理的ruby库

sudo gem install rvideo
sudo port install ffmpeg

file = RVideo::Inspector.new(:file => "#{FILE_PATH}/filename.mp4")
file.video_codec  # => mpeg4
file.audio_codec  # => aac
file.resolution   # => 320x240