Ac3 splitted to Vorbis (for sync)

[DiGiT@LON€]

Format : AC-3
Format/Info : Audio Coding 3
Format profile : Dolby Digital
Codec ID : 2000
Duration : 48min
Bit rate mode : Costant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : L R
Sampling rate : 48,0 KHz
Video delay : 80ms
Stream size : 66,1 Mb (10%)
Alignment : Splitted Audio
Interleave, duration : 40 ms (1,00 frame)
Interleave, preload duration : 80 ms
I have to convert the Ac3 above to a vorbis and mux it in a mkv.
As you can see, this ac3 is splitted. Have I set 80 ms of delay for syncking it with video in mkv?

Thanks...