Audio not in Sync with video

[DMBinbc]

I am trying to backup apocalypto along with a lot of other videos and from time to time the audio will be completely out of sync with the video. Has anyone any ideas what the problem is and does anyone know of software that will let me edit xvid movies so that I can adjust the audio?

[setarip_old]

Hi!

Load the file into VirtualDub, VirtualDubMod, or NanDub.
Set BOTH "Video"(VirtualDub,
VirtualDubMod and NanDub) and "Audio"
(VirtualDub and NanDub - VirtualDubMOD>"Streams>"Stream
list") to "Direct Stream Copy".

A) If the difference between audio and video is constant
throughout the video:

From the "Audio" dropdown menu, select "Interleaving" (For
VirtualDubMOD, rightclick on the listed audiostream and then
select "Interleaving")

Under "Audio skew correction", set an appropriate number of
milliseconds (positive or negative) in the box labelled "Delay
audio track by"

Save with a new filename

B) If the difference increases as the movie plays:

From under the "Video" dropdown menu, select "Framerate" -
and select "Change so video and audio durations match"

Save with a new filename

Let us know of your success ;>}

[DMBinbc]

I cant find the audio menu item. I understand your method and have read about the skew option but in my version of virtualdubmod there isnt an option for audio at all

[setarip_old]

Re-read my first post carefully:VirtualDubMOD>"Streams>"Stream list"

[CWR03]

In VirtualDubMod, click Streams > Stream list, then right-click on the audio stream and select Interleaving. You will then have the audio skew menu. VirtualDubMod does not have an Audio option in the File menu.

[DMBinbc]

Now how do I turn on the audio so that I can check if is adjusted properly or do I have to run the program several times

[CWR03]

It's a trial-and-error process - I'll usually select a few minutes of the video and save only that section, including the audio skew in the filename, until I get it right, at which point I process the entire video.

[DMBinbc]

I have eliminated 3-1/2 minutes of audio offset. I need to use your method and save smaller samples first. Its taking 15 minutes each dub. I will try to figure that out tonight, the saving small sample thing.

Is there a way of preventing this from happening in the first place? In AGN? I have a collection of 600 movies to go through and it is going to take awhile.

:)

[setarip_old]

I have always used MPEGMediator to convert my ripped owned DVDs to .AVIs - and have never had an out-of-synch problem...

[delacroixp]

"A/V Sync Issues" seem to be a never ending story (http://forums.divx.com/forum/viewTopic.php?id=3407), so a friend of mine posted a comprehensive thread on DivX Forums... pretty similar to Xvid in many respects...
Perhaps it'll help you better understand the A/V sync issues if not help solve the problem too.


:):devil::D
Pascal

[DMBinbc]

I have tried MPGModerator but it doesnt seem to compress the video at all. I need compressed, 1.5 to 2 GB, avis. Can MPGM do this.

Also, I like AGN Very much. Everything about this program works nice, except the audio sync problem. Is there a way of correcting this beforehand. I know that I can use VirtualDub to repair them but this effectively double and triples the amount of time I have to spend on the 100+ files.

[setarip_old]

I have tried MPGModerator but it doesnt seem to compress the video at all. I need compressed, 1.5 to 2 GB, avis. Can MPGM do this.The program I referred you to is "MPEG Mediator". Hopefully that's what you're trying to use (I've never heard of a program named "MPEG Moderator". I presume this is simply a typo that you've made).

And yes, if you properly select from the codecs you already have installed on your system (such as, perhaps, DivX or XviD for video and .MP3 for audio) by selecting "Configure plug-in" from the "Output" dropdown menu, it can certainly compress your .AVIs...

[UGC]

the way to figure out your delay time is play the "out of sync" file with media player classic, and while it is playing, go to Play>audio>options, and on the left, select "Audio Switcher" and on the right, click on "Audio time shift (ms)", and input your delay time. When you get it right, use that figure in vdubmod.

Note: don't forget to uncheck the time shift when you're done. Or everything will play with that time delay.

[jacorb_88]

Not meant to hi-jack DMBinBC's thread, I have a similar problem on Audio sync.

1. Captured DV analog to AVI thru Vista default 'Import Video' utility.
2. Open the AVI in VirtualDub MPEG and encode using Xvid compression with the following filters: Deinterlace, MSU Smart MSU Sharpness and MSU Brightness.
3. Played the resulting AVI thru Windows Media Player. Audio and Video are in sync.
4. Played the same output thru Vista Media Center. Audio and Video are NOT in sync.

What's wrong with this?

Thanks.

[delacroixp]

Welcome to Doom9 !


:):devil::D
Pascal