Digital Video Forums  

Go Back   Digital Video Forums > Other > Archive (Closed) > Video File Formats > AVI, DivX/Xvid

LinkBack Thread Tools Search this Thread Rate Thread Display Modes
Old 16 Oct 2007, 03:46 PM   #1
Junior Member
Junior Member
Join Date: Oct 2007
Posts: 1
Question After downmix audio video sync problem

i am attempting to re-compress old avi files which has high quality audio streams in order to save some space. most of the avi's have ac3 5.1 audio streams. after i down mix them and re-merge them to avi i get sync problem.

what i am doing is

1. loading avi in VirtualDubMod and saving audio stream in wav or demuxing ( i have tried both)

2. then disabling audio stream in
VirtualDubMod and re-compressing avi with lower bitrate
( i am satisfied with re-compressed video stream)

3. downmixing 5.1 ac3 (or wav) to 2.0. i have tried couple of ways to do this
i tried Tranzcode_v0.40(beta), tried BeLight-0.22beta9 also AC3Machine.
( i wasnt sure if downmixing was the problem so i have tried output in wav, ac3 and mp3 formates .. but all with 2.0)

4. I merge avi with ac3(or wav) using

i have also tried to leave sample rate, bit rate and sample size intact in downmixed audio streams in order to narrow down the problem. but no success yet

so i was wondering what i am doing wrong here?

any help or point in right direction is appreciated.

adarkenigma is offline  
Old 13 Nov 2007, 05:40 AM   #2
Junior Member
Junior Member
Join Date: Nov 2007
Posts: 5

download dgindex( and open source in it and save after making ur audio setting.the audio file formed have the "delay(in ms)"in its name,use this in ur belight.
hope u get it fine
first is offline  


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
video/audio sync problem Ham Other File Formats 2 9 Aug 2004 08:15 AM
Video and Audio sync problem mdtplus4 DVD Authoring and Editing 7 6 Aug 2003 03:26 PM
Audio/Video sync problem- skipping frames = audio ahead of video alien476 Other File Formats 5 22 Nov 2002 09:57 AM
Help!! Audio & Video Sync Problem!!! Droppo AVI, DivX/Xvid 4 19 Aug 2002 02:15 AM

All times are GMT +10. The time now is 04:19 PM.

Kirsch designed by Andrew & Austin

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright © 1999 - 2018 Digital Digest

Visit DivXLand   Visit