I am producing a video DVD and need to know what audio codecs are allowed on a DVD. Currently I am compressing them with AAC, but I would like to maximize quality. Would an Aif or Wav be possible? I have only one 5 min clip where I would need the better quality!
DVD is MPEG2-PS (Programme Stream) codec with MP2 or AC3 audio in a VOB container. DVD is Standard Definition - so 25FPS at 720x576 for PAL countries.
H264/720p is NOT the DVD standard. If you want to send the customer a DVD-Data disc with an mp4 file on it, then that is fine, but you're simply using the DVD as a data storage mechanism. You can't stick this in a DVD player and hope it will play. It won't.
If you want to make it play in a DVD player, you need to master it using a DVD authoring package and create SD video with MPEG2-PS/MP2/AC3 data in a VOB container.
If you want maximum quality, you could use linear PCM audio with the DVD. It is technically part of the specification, but it may not work in every player as support is somewhat spotty. The next best is DTS and after that MP2 in terms of data rates that are supported.
Your best bet is probably to include a PCM audio track as well as a DTS or MP2 stream. DVD's support multiple audio tracks for the same timeline and the track to use can be selected from the DVD menu. This way players that support linear PCM can make use of it while those that only support DTS or MP2 can make use of that. Wikipedia has details on the specification here.