How do you encode audio separate from video?

[satwar]

I was reading a guide on Cinema Craft which stated while video encoding is very good, audio is not that great. This statement seemed to imply that you can encode the audio track separate from the video track.

If you create an MPEG with the video stream only, how do you go about encoding the audio stream afterwards and synchronizing with the previously encoded video? What is this process called and what programs are required?

[manono]

Hi-

Synching isn't such a problem. Some programs tell you if there is a delay before demuxing the audio (PGCDemux, if the source is a DVD). Others (DVDDecrypter, DGIndex) put the delay in the name of the demuxed audio. When authoring or remuxing, you take that delay into account. As for audio format conversions, if the source and destination is DVD, then ordinarily no audio conversion is necessary (AC3 for both). If it's necessary for other format conversions (DVD to SVCD, for example), programs such as BeSweet or HeadAC3he can do it.

[Krispy Kritter]

The term you are looking for is demux (seperating audio and video streams). The tools involved, at least for the video, will vary according to the source file type. Audio tools will be the same, I use Goldwave for my audio needs.