Sync problem in PCM to AC3

[tepman]

I have a DVD with an enterview with PCM audio and I want it in AC3 to save some useful space before to compress it with dvdrebuilder. These is what I do:
1-Use PGCdemux to demux all the streams. The audio is in sync.
2-Use Belight to compress to AC3.
3-Use muxman to mux it.

But the audio is out of sync. Is any better way to do it??? Maybe is Belight? THX in advance. Sorry for my english.

[linyx]

1-Use PGCdemux to demux all the streams. The audio is in sync.
Is it in sync before or after demuxing? If it is in sync before, then hit check a/v delay and input that when you reauthor in muxman.

[tepman]

I checked the a/v elay in pgcdemux and say it's 0. The problem seems to be in the conversion. Wich program I have to use instead of Belight???

[tebasuna51]

The audio conversion never introduce async. You can use BeLight, BeHappy, command line or commercial encoders, the result is always the same (talking about async):

All ac3 encoders introduce only 5.333 ms of delay (can't be detected) and using Aften -pad 0 the delay is 0 ms.

You must search the problem in demuxer/muxer or video framerate changes.

[tepman]

After doing some more testing. I decided to convert the video to avi to verify that the conversion is in sync. I used autoGordianKnot. After demuxing the files DGIndex pop this window

http://img80.imageshack.us/img80/5397/dibujoxb7.jpg (http://imageshack.us)

And the output avi isn't in sync also .

[tebasuna51]

Use last DGIndex versions to avoid this error.

Use eac3to (something like):

eac3to D:\Path\VTS_01_1.VOB+VTS_01_2.VOB+VTS_01_3.VOB

and show the log.

[tepman]

eac3to log:

eac3to v2.74
command line: eac3to J:\XXXs\LIVE_IN_LONDON\AMY_WINEHOUSE_LIVE_IN_LONDON\VIDEO_TS\VTS_02_1.VOB+J:\XXXs\LIVE_IN_LONDON\AMY_WINEHOUSE_LIVE_IN_LONDON\VIDEO_TS\VTS_02_2.VOB+J:\XXXs\LIVE_IN_LONDON\AMY_WINEHOUSE_LIVE_IN_LONDON\VIDEO_TS\VTS_02_3.VOB
------------------------------------------------------------------------------
Swapping endian...
VOB, 1 video track, 1 audio track, 5 subtitle tracks, 0:46:27
1: Joined VOB file
2: MPEG2, 480i60 /1.001 (16:9)
3: RAW/PCM, 2.0 channels, 16 bits, 48khz
4: Subtitle
5: Subtitle
6: Subtitle
7: Subtitle
8: Subtitle

The structure of the dvd with vobblanker (VTS2):

[tebasuna51]

Try with this ac3:

eac3to D:\Path\VTS_02_1.VOB+VTS_02_2.VOB+VTS_02_3.VOB 3: output.ac3 -192

[tepman]

I used eac3to to encode the audio but the sync problem still present. After doing several testing I figured out a delay of 500ms. I encoded the audio to AC3 with eac3to with 500ms of delay and after muxing it work like a charm. I don't know where's the audio problem benneath but at least I knew a kick ass tool like eac3to. THX a lot everybody for bring me your help.