I confirm that installing 'libavcodec-unstripped-52' solved the issue on Ubuntu 9.10 aka Karmic Koala.
Following works now (both didn't work before installing the package) ffmpeg -i input.wav output.mp3 ffmpeg -i input.wav -acodec libmp3lame output.mp3 thanks! -- Unknown encoder mp3 error in ffmpeg (ibex) https://bugs.launchpad.net/bugs/296922 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs