Oops, sorry, seems this issue is covered in depth in the following thread:
It looks like I'm having the exact same problem. AME was broken during update to v18.104.22.168.
Adobe, are you any closer to fixing this bug?
Thanks for your reply Todd, but in the meantime what am I supposed to tell my clients when they ask why the encoding quality of the F4Vs is not optimum? Can I at least give them a timescale as to when this bug might be fixed? If you break software with an update I expect the fix to come in days not months. Or at the very least full, transparent disclosure of what went wrong / when it might be fixed. Please give us some information to work with.
Our engineers have identified the problem and are working on a fix. We don't yet have any news on when such a fix would be released.
> Any updates?
No. I can't comment on when specific software may be released.Feb 18, 2011Re: AME fails when attempting a F4V 2 pass encode
> Adobe, are you any closer to fixing this bug?
We're working on it.
Are You serious?
Sadly, I think he is being serious. This customer service/communication is pretty terrible. You would have thought, what with video being the cornerstone of Flash's success (and future) on the web, that when Adobe break their main video encoding software with an update they'd scramble to fix it. To be honest I just don't understand this behaviour.