Digital Video Forums  

Go Back   Digital Video Forums > Disc Formats > DVD Authoring and Editing

LinkBack Thread Tools Search this Thread Rate Thread Display Modes
Old 29 Oct 2004, 04:17 AM   #1
Junior Member
Junior Member
Join Date: Oct 2004
Posts: 2
Question TMPGenc DVD Author Audio Sync - Wierd!

I have been using an Adaptec Vide-OH! PCI card and MyDVD to capture. It has actually done quite well for me and I have used it for some time. I use DVD Author to build my DVD's and it works great. Most of my capture is from Dish and that's fine. However, I bought some region 2 versions of a TV show a few years ago and a modified DVD player to watch them. I have been capturing those episodes to burn them to Region 1 (their available for R1 now so there is no legal issue). I have transferred about 250 10 minute video chapter files and three are giving me a wierd problem.

I play the captured files in WinDVD, WMP, MPEG2VCR, and others and it plays great. However, in the "Chapter Cut Edit" setup of DVD Author, if I play the clip from the beginning, there is a sync delay in the audio. This shows up in the DVD, also. Here's the kicker: if I scan forward to a given scene and play it from there in DVD Author, the sync problem disappears. That's how I missed it, originally. It only shows up in DVD author if I play the clip from the beginning. Further, editing the clip to remove the first few frames does not help. The sync problem remains.

I found one solution to this on the web was to convert the mpeg to a new one through Showbiz. This works but the resulting video contains jitter and is unacceptable. The standard process of correcting a constant (not progressive) sync problem is to resample the video with an audio offset. I've done this many times successfully. Unfortunately, in this case, I have no tool that actually sees the sync problem. It only shows up on the burned DVD and in the Chapter Cut Edit tool of DVD Author and only if I play the clip from the beginning.

Here's a wierd twist. If I convert the mpeg to a new mpeg for DVD using TMPGenc Plus 1.5, the sync delay shows up on all tools. I could then use this to resample again with an audio offset but I have discovered that multi generation files have unacceptable quality.

Does anyone have any suggestions on the wierd sync problem?
stevethames is offline   Reply With Quote
Old 3 Nov 2004, 03:37 PM   #2
Junior Member
Junior Member
Join Date: Oct 2004
Posts: 2
Wink Solved

Ok, it turned out that the jitter problem was solved by swapping frames on the input source. I don't really understand that because Bitwise Viewer was reporting Field A (top field) was first but when I switched TMPGEnc 2.5 to specify Field B (bottom field) first on the input source, viola! No more jitter.

As it turned out, I took the original mp3 file that was captured through using S-Video and RCA 2-channel audio from a PAL DVD player and split the audio and video into separate files. I used Ulead Video Studio 8 to determine the audio offset (500ms) and then used TMPGEnc with the original file as the source. That is important because it is not necessary to merge the split files back together. I specified an audio offset of 500ms, set the field input to Field B (bottom field) and built a new MP3 file with the otherwise standard settings for a DVD mp3 in TMPGEnc.

This worked perfectly.

I hope this helps someone else.
stevethames is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

All times are GMT +10. The time now is 06:30 AM.

Kirsch designed by Andrew & Austin

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright © 1999 - 2018 Digital Digest

Visit DivXLand   Visit