encontrei um artigo curioso sobre o ffmpeg (link no fim da pagina)
“Unfortunately, in the Ubuntu repositories we have a version of ffmpeg that doesn’t support some formats (mostly because of law and license issues). The best solution as always is to download the source code and to individually configure and compile the program. We can download the source from:

svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg-source

You need a Subversion client to do this, so if you don’t have one, install it with sudo apt-get install subversion first.

There is a faster way to do it by downloading the daily snapshot of the source and than updating it:

wget http://ffmpeg.mplayerhq.hu/ffmpeg-checkout-snapshot.tar.bz2
tar jxvf ffmpeg-checkout-snapshot.tar.bz2
rm ffmpeg-checkout-snapshot.tar.bz2
mv ffmpeg-checkout-* ffmpeg-sources
cd ffmpeg-sources
svn update
./configure --help

The last command will display a long list of configuration options.”

http://polishlinux.org/linux/ubuntu/screencasts-in-ubuntu-part-2/

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