[LAU] Slightly OT - MP3 encoding ffmpeg and lame

Hi All, I'm trying to get ffmpeg to encode to mp3 format on a Centos 5.5 system. I have an FC6 system with lame 3.97 and ffmpeg 0.4.9 and a FC8 system with lame 3.98 and ffmpeg 0.4.9 both installed from RPM's found at ATrpms. On both FC6 and FC8 systems I can transcode a mpg file (captured by MythTV) to mp3 like this /usr/bin/ffmpeg -i /mnt/store/20560_20100621190000.mpg -ar 48000 -acodec mp3 -ab 128k -f mp3 test.mp3 But with ffmpeg 0.4.9/0.5.2 and lame 3.97/3.98 from either ATrpms or RPMForge on Centos 5.5 I either get an error message about ffmpeg not recognising the mp3 codec or a floating point exception. I must be missing something obvious, but what. Would building either package from source be a better route? Thanks in advance Ken -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.