audio lip sync out a couple of seconds

[ancient]

Hi Guyz

Just tried Sefys guide to dvd rip/copy/author
the resulting dvd has the lip sync out a cuople of
seconds

Anyone advise where i may be going wrong

Using dvd2svcd(dvd)
Tmpegenc
Tmpegenc author
copying pal dvd to nstc dvd

in anticipation of a quick reply
many thanx in advance

kriffendorf@aol.com

[spectroelectro]

PAL to NTSC conversions (and vice versa) always seem to produce audio sync problems. The Dolby AC3 soundtrack doesn't seem to want to sync with the video properly after the video's been converted from 25 fps to 29.97 fps.
The solution I use is to download freeware CDex and convert the AC3 track to WAV after demuxing it from the VOB file. Then convert the m2v file from PAL to NTSC.
Re-mux the WAV file and the NTSC m2v file, then convert the resulting AVI to MPEG-2 format.
For whatever reason, compressed audio formats seem to have big problems syncing up with altered m2v files. I think the reason for this is because compressed DVD or SVCD audio files interleave the audio with teh video about every second or so. This leaves a lot of time for the video to slide out of sync with the audio.
By contrast, an AVI file made up of a 48 khz WAV file + a video file has 48,000 digital uncompressed audio samples per second. This gives no opportunity for the WAV file samples to slide out of sync with the m2v file, since the data rate is so much higher.
To put it another way, a WAV file uses a lot more audio samples per frame of video than mp2 or ac3. This lets the WAV file track changes in frame rate more smoothly.
My explanation might be completely off base, but it remains a fact from my personal experience that re-muxed ac3 or mp2 fiels always slide out of sync, while re-mux AVIs made from DV m2v video + ucnompressed WAV files never do.

[ancient]

Hi

Thanx for prompt response

I will look at it later today

The sound was actually 12 seconds behind

ince then i have seen a text file hat states that

dvd2svcd now coies dvd2dvd but does NOT convert from pal to nstc in
dvd format just in dvd to (s)vcd

once again regards