OK, your mplayer version isn't the newest, indeed, the code to support of ac3 output on macosx was commited just after the 1.0rc2 timestamp. But you can found the usable version of mplayer in the MPlayer OSX 1.0rc2 in the mplayer's download page, it use some later code of mplayer, and have many very useful improvements.

-- Ulion

Grabbing the latest source I was able to have success. I must have gotten an old copy by mistake. Thanks! For the help of other Mac folks... download: http://www3.mplayerhq.hu/MPlayer/rel...apshot.tar.bz2 bunzip2 mplayer-export-snapshot.tar.bz2 tar -xpf mplayer-export-snapshot.tar cd mplayer-checkout-2008-05-04/ (or the date from yours) ./configure --disable-x11 make mv mplayer ~/bin rehash mplayer -ao macos -afm hwac3 -channels 6 Video.avi I can't explain why, but I did not have success with the Mac GUI build from the site. I tried both the "latest" and the 080327 downloads. Other folks have indicated success with those, I cannot explain why I did not, but when I did my own compile it did. _________________________________________________________________ Stay in touch when you're away with Windows Live Messenger. http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh...