why mux/demux?

[syeager]

I capture video from an ATI TV Wonder Pro in either MPEG or AVI. I then usually use TMPGEnc Plus to filter (very nice but slow), trim out commercials (uses the scroll of my scroll mouse - very nice), and convert to target MPEG for authoring to DVD. I never seperate out the audio and allow TMPGEnc Plus to just handle the video.

Is there a reason I should mux and demux?

[bunyip]

You only need to separate the streams if you need to fiddle with them like fixing a sync problem, normalising the audio or converting the audio to something else, or you want to use one of the MPEG editors that only accept demuxed streams. If you don't have any problems with keeping them together then leave it that way. I prefer to keep them together wherever possible.

[jimmalenko]

You only need to separate the streams if you need to fiddle with them like fixing a sync problem, normalising the audio or converting the audio to something else, or you want to use one of the MPEG editors that only accept demuxed streams. If you don't have any problems with keeping them together then leave it that way. I prefer to keep them together wherever possible.

What he said.

The only other time I would do it is if the authoring program specifically requires them demuxed, such as IFOEdit.