MuxMan: Audio not in sync

[indiannawaf]

I converted my avi into an mpeg 2 with HCEnc and i demuxed the audio using VirtualDubMod. I then converted the audio to AC3 using AftenGUI. I also used AC3Gain posted by a member of the forum to increase the volume of the sound. When i muxed eveything using MuxMAn, the sound plays 7-8 seconds before the video. I tried using the time delay but i couldnt get it properly.
What should i do?

Thanks!

[guns1inger]

Try using delaycut to fix the AC3 before muxing

[indiannawaf]

Thanks mate! It worked! But why did it happen in the first place?
I think i might have made a mistake while converting with AftenGUI.
I just converted with the default settings i.e CBR mode 384 kbps. Can you specify the settings to be used? The source AVI has no such Audio problem.

[guns1inger]

Some audio has a delay built in, sometimes avi files have glitches from downloading, and sometimes VBR MP3 does odd things when converted.

Regardless, it's good that it is sorted.

[Soopafresh]

Very hard to tell for sure. Sampling rate of the audio can have an impact, skipped video frames, many issues can be at fault.