Sorry I forgot the version number: debian lenny: 7:6.3.7.9.dfsg Was this a known bug in 6.3.7? I'll see about upgrading... Thanks, .b. duc.sequere.aut.de.via.decede at imagemagick.org wrote: >> convert -quality 100 frame00000.jpg -type TrueColor tmp.jpg > > This command works for us. We're using ImageMagick 6.4.7-10. >