Audio goes out of sync as video is played

Ensign · Member Joined: 22 Jul 2001 Location: United States

I hope that this is the right forum, if not sorry.

I have a video that is encoded as follows:

Video Codec: DivX 5.2.1 Alpha

Audio Codec: 0x0055 MPEG-1 Layer 3
Audio Sample Rate (Hz): 44100
Audio Bitrate(kbps): 128
Audio Bitrate Type ("CBR" or "VBR"): VBR

But, when I try to play it the audio go out of sync the longer it plays.

I tried Vitual Dub Mod, but, got this warning:

redwudz · Mod Neophyte Joined: 07 Sep 2002 Location: AZ, USA

First, it looks like you need to install the Divx codec.

Then with VIrtualDub Mod, select the audio in 'Streams' and then 'Full processing mode'. Save it out as a WAV file. Then add it back in and disable or delete the old VBR audio. Check for sync at this point. If your problem is still the same, the audio and video lengths are probably different.

You can adjust the audio length with a audio editor like Audacity. Output from Audacity as a WAV or as MP3 CBR, depending on what you want to do with the file when you get the sync correct.

VBR audio shouldn't cause sync problems for what you are doing. Did you do the Divx conversion yourself or did it come that way?

Framerate conversions, such as PAL to NTSC, bad frames, missing audio, corrupt video, bad cuts and joins can all cause sync problems. VBR audio just makes the problem worse.

Ensign · Member Joined: 22 Jul 2001 Location: United States

redwudz · Mod Neophyte Joined: 07 Sep 2002 Location: AZ, USA

Installing the newer Divx codec should give you the VFW compatible codec VDM needs. You probably just have the Direct Show version. I would also install the LAME MP3 ACM codec. Make sure you get the right one with LameACM.inf in it.

With VBR audio, you may not be able to properly read the the length of the audio track. That's why I would convert it to WAV or at least CBR audio. I suspect there are other problems with the file causing the sync error, though.

With VDM you can check for errors in the file and repair some of them.

Ensign · Member Joined: 22 Jul 2001 Location: United States

jman98 · Member Joined: 08 Oct 2004 Location: Freedonia

This is what happens when you run an OS 10+ years old on ancient hardware.
If you want stuff to work, you need to upgrade. If you don't have the money, I understand, but don't expect the world to support your ancient set up. If you are lucky, Xvid might still support Win 98 and perhaps you'd have better luck with that.

redwudz · Mod Neophyte Joined: 07 Sep 2002 Location: AZ, USA

Sorry, I missed you were using W98.

I haven't worked with that in years.

I would find a older version of the Divx codec, or try Xvid and see if that will supply the VFW codec VDM needs.

You probably have your reasons, but XP would have more options to work with newer programs.