Gordian Knot: Question On Audio-Delay Settings

[Jackie]

Hi,

I am currently using Gordian Knot to encode with the brand-new DivX 5 Pro codec. But there is one confusing thing in the (otherwise excellent) Gorsian Knot (DivX5 Guide) guide on doom9.

In Step 2, in Audio Encoding, I have to enter a delay in the Audio 1 Tab (see http://doom9.org/gknot-audio.htm, Step 8: Audio Encoding), which obviously will affect the mp3-file in some way.

And then later, in Step 4 (Join video and audio) with Nandub, it says: "Enter the delay value from your AC3 file in the Delay audio track by XY ms field. Negative values get a minus in front of course. Then press OK. There's no need to change the other values."
(see http://doom9.org/virtualdub_procedures.htm#mp3mux near the end of the file).

i.e., here I enter the delay a second time. Is that correct?

Conclusion: if I follow that guide as described, I have subtracted (or added) the audio delay twice, right? Or is there anything wrong the way i think?

So, what is the right way to handle this. should I enter the delay in both steps (as described), or only in the first (when extractinng the audio), or only in the second (when muxing audio and video)? I am really confused.

Thank you very much for your help.

Regards,

Jackie

[jggimi]

As I understand the delay shown in the Audio 1 tab, that's used when "just mux" is selected, only, typically for ac3 audio. Azid and LAME will not use this parameter when creating MP3s. The delay used by GKnot (for DivX4 or DivX3) when letting it automatically mux mp3 audio with video in Nandub is the delay built into the file name by dvd2avi.

Netting it out, you're entering a delay in that field in the tab has only wasted time, but caused no problems.