audio sync problem (xvid to DVD)

[kthan]

I have two xvid movie files and want to convert them into a DVD.

First, I joined two files into one by using virtualdub (no error message and I checked the new file and found it fine...no audio sync problem....no discountinuities, etc.).

Second, I tried several different programs (for convenience, I used all-in-one program), like DVD2SVCD <with both TMPGEnc and Cinema Craft>, AutoGK, DVDFlick, Convertxtodvd.

But, none of the programs resolved audio sync problem (Audio comes about 1-2 sec faster than video). If I tried one program, I suspect a problem (or setting issue) of the program. But, so far I tried at least four different programs and had same problem.

Also, I don't think it may be related to a joined(combined) file because I double checked the joined file and there's no problem of audio-sync in that file at all.

Please advise me how to resolve this issue. I appreciate your help in advance.

[ZippyP.]

Also, I don't think it may be related to a joined(combined) file because I double checked the joined file and there's no problem of audio-sync in that file at all.

Although it plays fine joining could still be the problem. Try it without joining, it's not necessary. Create your two mpegs and let the authoring program "join" them by having them play in sequence.

[kthan]

I tried and just finished one file (not joined) to convert to DVD in one program (Convertxtodvd). Exactly the same problem happened. It doesn't look like this problem happened because I joined two avis into one.

[ZippyP.]

Bad frames maybe. They won't necessarily show up when viewed.

[jokster]

Try taking the audio out of your avi first, saving the avi waith no audio and your audio as a seperate file. Use besweet to convert your audio to ac3 or another dvd compliant format then convert your avi lastly let you dvd authoring app combine them. This method has worked for me in the past and is now the only way i do my conversion. Be careful to make sure you select the correct framerate in besweet, if you are down converting 30fps to 24 fps you dont need to alter the audio framerate.

[Bjs]

Check your avi's using gspot and make sure they dont contain "vbr" audio ... cbr is ok .

[kthan]

After I post the question, I converted another (different) file and had same out-of-sync error. It doesn't seem to be the problem of a particular file. I suspect there's a problem with audio reencoding.

So far I tried different types audio encoding (AC3, MP2, Wav) by using different programs (Besweet, ffmpeggui, Headac3he). Also, I tried to encode audio (with video file) in DVD2SVCD, Convertxtodvd, dvdflick.


I don't know what to do next. Pleaes advise me.

[Paul_G]

Guessing that it is ac3 audio.

Join both files in virtualdub(mod) and demux the audio and run ac3fix on the sound file, if not all looks ok playing the joined file but after converting to mpg the sound will be out of sync (usually happens half way through the film ie: when the second file starts).

[kthan]

I did ave very interesting experience yesterday. I tried the file with older version (2.05) Convertxtodvd in my laptop and it did not
have out-of-sync problem. I had newer version (2.14) in my desktop and I used this when I tried the files (both individual and combined) before. After I succeded, I tried the same file in the newer version (in my desktop) again, but it still showed out-of-sync. Then, I uninstalled the newer version and install older one in my desktop and tried again. I got another success.

I don't know the exact difference between two versions, but it looks like newer version processing time a lot faster (like 2.0-2.3x, as compared to 1.3-1.5x in older version). It seems to be very strange. For your reference, I tried other encodings by using DVD2SVCD and separate encodings (using VirtualDub, besweet, TMPGEnc or CCE, and TMPGEnc dvd author) in both laptop and desktop, but all resulted in out-of-sync. Any comments on this?

[jokster]

When you strip the audio from the avi does it stay in sync? To test this load your avi into vdub then load your audio and check the framerate (ctrl+f) is it the same or does it need adjusted?
Are you changing the framerate in your conversion? I've had problems with that in the past.
Does your xvid have a packed bitstream? Dont know how this can effect the conversion but it used to mess with TMPGEnc and give jerky playback. To remove PBS use mpeg4modifier.
I used to get sync probs in the past but since i changed my dvd creation process all has been well. I use avimux to rip the audio, besweet to convert it, nandub to save avi with no audio, a quick avisynth script and CCE to conert to dvd and then chuck it all into dvdlab for authoring. Changing audio framerates is where most errors occur so i try to avoid it where possible.

[mwkurt]

load each file into AVIMuxGUI, double click on one file. The file attributes will be displayed in the lower window. This will tell you how far your video is out of sync with your audio. From there highlight the audio portion and select save. It will take 10 or 15 seconds for the file to save, but your audio will now be in sync. Give it a try!
Mark

[kthan]

Before I try some as suggested, let me clear this. The xvid files are not out of sync. Only when it's converted into DVD-compliant format (and burned into dvd), the problem shows up. The audio framerate is the same (AC3 5ch, 384kbps). Also, I was wondering how I can use AVIMuxGUI with a dvd-compliant files (MPEG2 for video and ac3 for audio).

[mwkurt]

As the name of AVImuxGUI indicates, it is for avi files only. I can't make you try this program on your xvid/divx files, I can only suggest. However, I can tell you this. I had the oos problem a few times using Divx2DVD and came across the above mentioned application. I tried it and it fixed my problem. When I played my divx files I didn't think they were oos either. It turns out they were only out by a few hundred milliseconds, but they were out and AVImuGUI fixed my problem. a few milliseconds can compound itself over the duration of the files and by the end of the file, can be seconds off. It is free. Just try it and make sure it is not your Divx/Xvid files.
Mark

[kthan]

Mark, as you suggested, I tried AVImuxGuI with my xvid files. And, as you expected, they show delay (2049, for example). Then, I highlighted the audio part and click select. A new file was created. But, the problem happened when I use the file with DVD2SVCD. The audio conversion has been done in quick couple of seconds and there's no audio in the final dvd file. Am I doing something wrong? Even if AVImuxGUI corrects un-noticeable audio delay, I still cannot make a fine DVD, yet. Please advise me what to do.

[mwkurt]

I don't use DVD2SVCD so I can't help you there. Here is what I do.
I load the divx file into avimuxGUI and double click it. In the bottom window, as you have seen, the delay will show. Single click the audio portion on the bottom window and then click start. A box will pop up to name the file and save it. Give the file a different name and store. I have found that if I overwrite files sometimes they get messed up. If you have any doubts, load your new file in AVImuxGUI and test it again. It should show that there is no delay.
After that, I would try it with ConvertXtoDVD. I have used that and all of my DVD's are in sync. I mainly use SVCD2DVD and all of the Xvid/divx files I convert are in sync. I have found it to be a good habit of running all of my files through AVImuxGUI to correct any sync problems. Try SVCD2DVD too. There is a trial version I think. If it works for you. Consider purchasing it. At $20.00 it is a bargain!
Hope this helps you.
Mark

[mwkurt]

To update my previous post. I am now in front of my PC, so I can go through my steps for you.
open or drag your xvid/divx file to AVImuxGUI and double click the file. In the bottom window the results of your file will be shown. You will have the details of the video file and the audio file. If your audio file shows as having a delay, highlight the audio portion in the bottom window. Click start and give the file a name. Select Save. At this time you should see the process of saving the file start. It should take a few seconds depending on the length of your file. I should note that I am using AVImuxGUI version 1.17.6. As well, here are the setting that I have. I think they are by default:
"all audio streams" and "all subtitles" are selected, also the file attributes in the bottom window are both checked. I think they both need to be checked to save both into your avi file. After saving the resultant divx/xvid file, play it to make sure it has audio. If it does, you should be good to go. As I said before, load the file you saved again to make sure it is good and see if you have both video and audio.
Please look at this link as this is the one that helped me out:

https://forum.videohelp.com/viewtopic.php?p=1338598#1338598

Hope you get it sorted out,
Mark