Do Not Use the Vorbis FFMPEG enecoder if you building WebM!, Monty mentions this in his blog post, but nobody is listening! Options

[HotshotGG]

A lot of open-source enthusiasts and advocates are very excited about Google latest announcement of VP8 / Vorbis combo in a new container called WebM. The entire HTML 5 enthusiasts are so excited that they went a ahead a little to prematurely are building suboptimal builds! Michael Niedermeyer of FFMPEG projects acknowledges that the FFMPEG Vorbis encoder is buggy! Monty has a work around on his blog if you plan on building the WebM encoder under Linux. I am also providing an explanation in the wiki as to why it's generally a good idea to use the mainline libvorbis with libavcodec instead due to the fact that is has 5.1 channel coupling implemented correctly! Please spread the word as this will turn into a disaster sooner or later before it's patched. If you thought the HTML 5 wars are not bad enough now!

Monty's Blog:
http://xiphmont.livejournal.com/51160.html

This post has been edited by HotshotGG: Jun 12 2010, 18:43

[LordWarlock]

It would be useful to have an independent (from the developers of libvorbis) validation of the perceptual performance... since the "well known suggestion to use libvorbis" is not that well known.

And Monty is... ???

The FFmpeg internal encoder is just a very simple encoder that makes no attempt at high quality. It includes no psychoacoustic code and its only goal is to spit out a valid bitstream, not make it sound good.

Source: http://xiphmont.livejournal.com/51160.html...=145112#t145112