Audio getting more and more out of sync

[nofsky]

I've been trying to encode one of the bonus features on one of my DVDs to x264/mp3 with MeGUI.

The sound syncs perfect in the beginning but as the video goes on it becomes more and more out of sync so that near the end of the (1h23m long) video the sound is about half a second before the video. This is with the transcoded mp3 audio but the same happens with the original AC3 audio.

I've been using the "x264: Unrestricted 2pass HQ" profile in MeGUI.

Have the x264 encoder or MeGUI dropped frames from the video or something? Can anyone help?

[Sharktooth]

without more info on the encoding process... we cant help.
just check the source and encoded FPS.

[poisondeathray]

Check the lengths of the source & encoded video & audio. You can use mediainfo for example

Did you decrypt the source?

Did you use the script creator or custom script? DGIndex?

[JarrettH]

Make sure your selection in DGIndex (the VOB files) is only what you want to encode. If you have a title screen or menu before it'll mess up the audio sync.

You may have...

- VTS_01_1
- VTS_01_2
- VTS_01_3
- VTS_01_4
- up to VTS_01_9

But your movie could be only files 3-9

[nofsky]

I used DVD Decrypter to rip the special feature from the DVD into one VOB file. There is no title screen, menu or anything before it.
In MeGUI I used D2V Creator & AVS Script Creator.

The AC3 extracted by D2V Creator is 1h 23mn 53s 184ms.
The AC3 encoded to MP3 is 1h 23mn 53s 275ms.
The VOB file is 29.970 fps (Mediainfo won't show the length, GSpot shows 1:23:54, While playing the DVD VLC shows 1h 23mn 38s)
The VOB encoded to mkv/x264 is 1h 23mn 53s 529ms at 23.976 fps

Is it the conversion to 24fps from 30fps that causes it?
VTS_03_1.d2v.bad & VTS_03_1.fix.txt are created. Is that related?

Thanks for your help guys.