I'm based in USA and I gotta do a wedding DVD in the PAL format for a relative in Australia. Do I just render to DVDA-PAL Video stream and the standard AC-3 audio track? Or is there another audio format for PAL?
Also, do I need to deal with DVD region code?
AC-3 isn't technically required by the PAL standards, but in practice all PAL players I've ever seen support it. PAL standards call for either MPEG layer 2 audio (which DVDA doesn't support) or PCM.
In practice, most PAL players and TVs will handle an NTSC DVD OK, so another option is to just send them the NTSC disc.