Yes, I have. BTW, if you have a version with Keary's qt-faststart patch, it no longer matters if the moov atom is at the start. debug=True hasn't created a debug.txt file for a long time -- that was outdated documentation. (I've just corrected it.) Instead, it just adds more output, which still goes to the console, unless you redirect it or use the logging options. It might be that your audio is being reported as libfaad instead of mpeg4aac. I've added that to the pass-through list this morning.