Comments on: Extracting Audio from Youtube Videos (.flv files) on a GNU/Linux System http://njaan.wordpress.com/2008/12/23/extracting-audio-from-youtube-videos-flv-files-on-a-gnulinux-system/ Wed, 23 Mar 2011 12:10:36 +0000 hourly 1 http://wordpress.com/ By: Gregory Maxwell http://njaan.wordpress.com/2008/12/23/extracting-audio-from-youtube-videos-flv-files-on-a-gnulinux-system/#comment-640 Sat, 07 Feb 2009 22:33:36 +0000 http://njaan.wordpress.com/?p=95#comment-640 What you should never do is use the “-acodec vorbis” option of ffmpeg as described here. Instead use “-acodec libvorbis”. This small change is very important. The former uses the the internal FFMPEG encoder, the latter uses the libVorbis library.

The internal ffmpeg vorbis encoder is about the simplest possible encoder that produces working output. It sounds terrible compared to the reference encoder. On a typical musical input the ffmpeg encoder set to 128k produces quality which is obviously worse than libvorbis at 32kbit/sec.

The ffmpeg vorbis encoder is not going to have better quality than MP3. If you use a proper encoder (libvorbis) you should seldom have a need for a bitrate greater than 130kbit/sec.

]]> By: Hari http://njaan.wordpress.com/2008/12/23/extracting-audio-from-youtube-videos-flv-files-on-a-gnulinux-system/#comment-623 Tue, 23 Dec 2008 10:49:39 +0000 http://njaan.wordpress.com/?p=95#comment-623 Wow! That was an awesome tip. Thanks a lot, chetta. :-)

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