On Tue, Aug 17, 2010 at 01:29:38PM +0000, Sean McGovern wrote: > Except that this decision is made in libmpcodecs/ad_hwac3.c. No it isn't, just set format to what you need in the ao an that is what you will get there. The internals of ad_hwac3.c are/should be of no concern at all for this issue.