Encoding audio with VirtualDub MOD

[GangstaRap]

Hi!
I want to encode to Xvid with VDubMOD using 2 pass encoding.
what if i want to encode the audio too?
when should i be concerned about the audio compression - in the first pass or in the second?

*Edit*

i have one more question,
its about this massage:

i surely dont want to cause an out of sync video so i won't press "Yes",
but why should i save it as wav and then recompress it, if i can recompress the audio directly by choosing "Full processing Mode" in "Streams" section?
can i recompress the video and the audio at once?

Thanks In Advance!
any help appreciated!

[jagabo]

I usually find you can answer no to the question, then as you surmised, just enable Full Processing mode and recompress. It doesn't always work though.

[GangstaRap]

jagabo, thanks for helping me man!

It doesn't always work though.

why?
what problems can it cause?

and what about the 2 pass encoding,
when should i define audio compression?
first pass? second?

thanks again and have a nice day!

[jagabo]

When audio full processimg mode doesn't work you'll end up with out of sync audio.

If you're doing 2-pass video encoding you only need to compress the audio on the second pass.

[redwudz]

I find the most dependable way to deal with VBR audio is to enable full processing (as PCM audio, the default), then save out the audio as a WAV. If I'm just going to encode for Xvid/Divx, I add it back in and use the Lame MP3 codec to convert to MP3 at the same time the video is encoded. I do the same if I need to edit the video before encoding.

If I am going to convert to DVD format, I convert the WAV to AC3 with ffmpeggui, then add it in with the encoded MPEG-2 video in the authoring program.

[GangstaRap]

jagabo, redwudz, thanks for the help guys!

I find the most dependable way to deal with VBR audio is to enable full processing (as PCM audio, the default), then save out the audio as a WAV. If I'm just going to encode for Xvid/Divx, I add it back in and use the Lame MP3 codec to convert to MP3 at the same time the video is encoded.

is it a way to avoid out of sync audio?