OggMux generates small delay?

[augi]

I encoded the same movie in 2 formats:
-Divx5.0.2 + MP3 128Kbps in AVI container
-DivX5.0.2 + Vorbis 64Kbps in OGM container

I muxed the AVI using Nandub and the OGM using OggMux (latest version 0.9.2).
The OGM movie has a slight audio asynch problem. The audio is heard before the video. It's not very annoying, but it's there...
What's strange is that it doesn't happen in every DVD rip I do, so I can't find what's wrong. I tried uninstalling the ffdshow filters but the problem remains. And as there is nothing wrong when I use MP3 soung, I suspect that there's something wrong with the OGM multiplexing procedure...or with my ears ;-)

[Koepi]

The error is simple tracked down:

DivX5 with bframes introduces something called "delay".

it's caused by the structure:
IBBP frames are stored as IPBB ...

thus a delay of 80ms (PAL, 25fps) isn't unusual.

[augi]

From your answer I understood that the delay is caused by the DivX encoding. So, if it's only DivX's fault, the delay should be present in both MP3 muxing and Vorbis muxing. But I hear it only in the OGM container (with Vorbis audio)...So if I want no delay, I should stick to DivX+MP3?

[Sigmatador]

i think you should use xvid+ogg ^^
but if you really want divx5+ogg disabled the b-frames.

but with all my divx5+ogg movies, using the last ffdshow there is no problem... (no broken frames and no delay)