DVD audio synching problems

[Silythra]

Ok well I know that this topic has been discussed before... or at least audio sync problems in general. I've searched through and read a lot of posts about this but I have yet to solve the problem I'm getting. Either that or the solutions offered were not for what I was trying to do.

Anyhow... I have avi movie files which I'm trying to put on a DVD. If it matters at all, I'm encoding the movie with TMPGEnc Plus and I'm encoding the audio to AC3 using FFMPEG and then authoring it with TMPGEnc DVD Author. There's a gradual sync problem in all the files I'm putting in. Starts off fine, ends up off. Each clip is only about 24 minutes long or so but the off-sync-ness is enough to bother me (especially seeing as how if I were putting this on VCD instead of DVD, there'd be no off-sync problems). The only reason I'm going by DVD is for better quality and the fact that I can add more files per disk.

I've scanned the original avi files with Virtual Dub and I've found no bad frames or anything like that (actually I only scanned the first file but seeing as how the first file has the syncing problem with no bad frames, then whether or not the other files have bad frames or not isn't going to matter yet).

I've also extracted the wav from Virtual Dub and loaded it into Sound Forge in an attempt to try a solution offered in another post. Here's where I found something very weird. Where the end of the audio file should be, it doesn't end there. IMMEDIATELY after the supposed-to-be-end it has some sound (I think it's the last half second of actual sound from the file but... just know that it's some sound) that repeats itself over and over again so that the audio goes on for an hour whatnot when it should have ended back at 23 minutes something. Even stranger is that when I deleted all these extra repeated sounds so that the audio length was the same as the video length, I replayed the file and there's some noise (probably from some point in the audio sequence) that plays for a quick second... and THEN the actual audio file will play as normal. Not only is this just a "little" strange but the waves that show the audio still show it as if nothing were wrong. Pushing play will have the bar move through the file normally but what actually comes out the speakers is that initial sound... followed by the actual file so the sound being played compared to the waves on the screen are off by however much amount of time that initial sound takes up. Confused yet? Me too. Anyhow... it doesn't seem like Sound Forge is going to help me much.

So... um... any ideas or solutions I may have overlooked?

[Sugar]

What is the source of your .avi file. Is it home video or ripped DVD?
Are audio and video in sinc in your .avi file?

[Silythra]

Hmm... I guess I forgot to mention that info originally huh?
I believe it's DVD ripped but it has been editted after having been ripped but I'm not entirely sure. It's an anime that's being fansubbed and according to the fansubbing group, it's the DVD version so I can only assume that they ripped the DVD and then added the subtitling.

The avis are all in sync though... no problems there.

[Silythra]

No one has any idea for why this happens?

[Sugar]

Does the sound file of your ripped anime mention any delay e.g. 305 ms?

[Silythra]

Do you mean when I open it in Virtual Dub? Then no. No error things pop up or anything.

If you mean by other methods, then I don't know what methods they are.