Audio Outta Sync When Converting AVI 2 VCD HELP!!!

[[uM]-ConstantSorrows]

HI Guys,
I was Wondering If you can help with the problems i am having. I am using the latest tmpgnc. Converting AVI 2 VCD but sound is a few sec off or feww seconds ahead. I tried everything and DL all kinds of help tools but still no results. I'm a Veteran user of tmpgnc and had problems beore but i thought they had fixed all the bugs by now? pLEASE GIVE ME ADVICE ON WHAT TO DO...

I have only been doing this for a week or so now but here is what I do.

1) I open the avi file in VirtualDub (freeware)
2) Usually, if there is a problem, I will get a warning message about the audio and video being out of sync.
3) Once the AVI is loaded, I start playing at a variety of spots to see if it is in sync.

This is where a lot of troubleshooting begins.

- If the audio is in sync at a number of points and then suddenly goes askew, there is most likely a problem with the AVI file. Assuming you are using a DivX AVI file, use DivFix (more freeware) to correct the problem then open it again in VirtualDub.
- If the audio is in sync all the time in VirtualDub, but gradually slips away, you probably need to export the audio and video tracks separately, resample the audio track to give it a constant bitrate then blend the two together in VirtualDub again to export it to an AVI.
- If the audio is out of sync steadily throughout the video, you can adjust the skew in VirtualDub then export the AVI.

VirtualDub solves most if not all of the audio sync issues. Give it a try.

I didn't go into much detail on how to actual do those different things. If you need elaboration, let me know here and I will reply tomorrow morning.

[patterson]

i am fairly new at all of this so if anyone can explain this to me please do. i was having alot of sync problems when i used vdub. i would do everything correctly as i have read. then i would open the video file in tmpgenc use the wav audio i made in vdub. sometimes it would be in sync and sometimes it wouldnt, so i started just skipping vdub and using the original audio from the divx or xvid movie and it seems to work fine on my jvc dvd player. why do people even convert the audio to wav?

[ariddon]

Because tempgenc cant handle so audio format at all.

[[uM]-ConstantSorrows]

thank you hangoverms i will try that it makes sense

[Hardcoreruss]

If you want a simple method get Eazy VCD from the tools menu, never fails.

[honorarybrutha]

use vdub mp3 version (available in tools section). load avi in vdub mp3. go to audio>direct stream. also go to video>direct stream. then go to video>scan for errors. if no errors, vdub will tell you. if you have errors, check the vdub file called "bad frames." read the guide available on this site for how to PROPERLY remove bad frames. then save the fixed avi with "save avi" in vdub. you should now be able to load the fixed avi in tmpgenc, using both the audio and video from the fixed avi and you should not have any sync problems in the resulting mpeg1 output.

[cipherscribe]

SO can someone tell me what happens when you process your AVI through the vdub version of MP3 freeze, and you get no errors, however the audio is STILL out of sync? The process I have followed is as follows:

Load up avi in MP3 freeze vdub....no errors
Extract the audio using vdub, making sure audio is set to 'full processing mode'
Load up TMPGenc and add the avi and audio Check that the encoding will be the same frame rate
Make the dvd a VBR with high quality, and check that the output will be in two different streams.
Once complete, load up in reel DVD (or anything else, tried the TMPGenc authoring tool)
and whoal,.. completely out of sync!

I have been using this same process for months without problems, now these avi's are killing me!

It's out of sync by a second or two, it seems to stay constant from about 1/4 the way in from the film, and continues to the end....

HELP!

[cipherscribe]

oh yea, btw, the original AVI is puuurfect, in terms of audio/video sync

[NoTalent]

I am having the exact same problem as you cipherscribe.

When I follow all the instructions, my audio is still out of sync with my video when I convert to mpeg from avi+wav using TMPGEnc. I am going to adjust the skew (in my case its 1.5 s off) and then re-save the avi. Then I can re-encode using the avi as my audio and video source (from what I read above). I hope this works.

Is there any place that explains why this happens? Other than VDub can't hande VBR?

Regards
-NoTalent

[macleod]

I am making the grand assumption that this is not an avi that you made. If so, the reason that this sometimes happens (usually downloaded material) is that the author of the avi file slaps it together. The computer generally accounts for all of this and it plays perfectly. Standalones are not as forgiving and you get sync errors.

That is the easy answer for why this happens.

If it is your own material, it comes from the way you do the conversion. Please list the steps and the tools that you use in order to do your conversion to avi and I can see what it may be.

[Gazorgan]

TMPGEnc doesn't do VBR(variable bitrate) audio. A lot of bootleg DivX files are encoded with VBR MP3 files to keep the file size down. That's why you convert it to WAV and go from there. VDUB does a mediocre job.

Try AVI2WAV..... a great little utility!

[NoTalent]

I am making the grand assumption that this is not an avi that you made. If so, the reason that this sometimes happens (usually downloaded material) is that the author of the avi file slaps it together. The computer generally accounts for all of this and it plays perfectly. Standalones are not as forgiving and you get sync errors.

You are correct in assuming I downloaded this file. I'm not sure if I am at liberty to say what it is (is that in the posting guidelines?). It plays just fine when I use my default windows player (WMP 6.4, under Win2K). When I load it in VDub to rip the audio, and I play it in VDub the audio is out of sync.

I am not sure what you mean by 'standalone'.

TMPGEnc doesn't do VBR(variable bitrate) audio. A lot of bootleg DivX files are encoded with VBR MP3 files to keep the file size down. That's why you convert it to WAV and go from there. VDUB does a mediocre job.

Try AVI2WAV..... a great little utility!

OK--I think I've read some of your posts before Gazorgan. I remember the funny little avatar. I've scanned a lot of the forums and searched a bunch because there have been a lot of people having this issue.

So what you are saying is I can just take the avi file I have, run it through avi2wav and grab the audio. Then I can take TMPGEnc and use the orig avi as the video source and then the new *.wav I created as the audio source? If so, what would be the difference (if any) of doing it this way and the way I suggested in my first post.

I really appreciate your help

Regards,
-NoTalent

[cipherscribe]

Hey NoTalent,

I worked out my problem a little while ago. Seems ripping out the .WAV from the avi using vdub then bringing it back in with tmpgenc, seemed to stuff things up.

I know the guides I read said to split the streams (who ya gunna call?) prior to encoding in tmpgenc, but when I used the avi for the source video AND audio in tmpgenc, it worked a treat.

Go figure!

Might not be your answer, but keep playing with different ideas, you will fix it! (-:

[Hardcoreruss]

I just quickly scanned this one, not sure if it has been mentioned but have you checked for bad frames ?

[cipherscribe]

Yep,

Mine was clean as a whistle...

[macleod]

Standalone means a standalone dvd player like the one that would be normally hooked up to your TV.

I am going to assume that the downloaded avi is something that is free from copyright issues (ex someone's home movie that they did not copyright).

What I use to ensure that avi files that I make or receive dont have audio sync issues is use dvd2svcd. It does a lot of the work for you and again, I have never had a sync issue using this software (it does the splitting of the audio and all that on its own w/o you having to mess with it).

For vcd, just use the vcd template and you should be good to go.

[NoTalent]

Thankyou everyone for your help. First off--I finally got it to work!

Now, I'm going to go through the steps I used, and ask some questions about why/why not some thing did or didn't work.

The first thing I tried was to use Nero to go straight from *.avi -> SVCD. That didn't work, video was upside down (figured that out) and the sound was still out of sync.

I did some reading and tried EasyVCD, still had the sync problem.

Found a guide someone linked to from here showing how to go from AVI to SVCD. I used VDub to rip the audio from the *.avi as a *.wav file. Then I used TMPGEnc to change the *.avi + *.wav into a *.mpeg file. I burned this to SVCD and found that the sound still was out of sync.

So I did some more reading and I saw that you could open up your file in VDub and do audio interleaving. So I did this with the *.mpeg file, and in the Audio skew correction part--I put 1500 into the Delay audio track and then the file was synced! Only problem was, I couldn't figure out how to save my changes... It had some export to *.avi, but no save as *.mpeg.

So I tried the same thing with an *.avi file. I tried adding a delay in the file, but it wouldn't work. I'm not sure what the problem was. My changes wouldn't take--or when I added the 1500ms delay, it wouldn't show on the screen. Why doesn't this feature not work for *.avi files?

So--Then I did this. I knew that the 1500 ms is what I needed, so I downloaded goldwave. I ripped the *.wav from the *.avi file again. I took the wave file and added a 1500 ms delay at the beginning using GW (Insert Silence feature). Then I used TMPGEnc to do the *.avi + *.wav -> *.mpeg conversion. I checked the new mpeg and it was synced!!!

So then I used EasyVCD to burn my SVCD and played it in my standalone DVD player last night! Thanks again for all your help. Can any of you answer why some of these things didn't work?

It was a learning experience, no doubt!

Regards
-NoTalent

edit: The file in question is a *.avi file and it is Xvid (This is divx??) and mp3 audio. [I looked this up in gspot]

[kupsjon]

Right i am having a simalar problem I understand that it is a VBR problem. However your final method sounded great to me until i saw that basically VD said that it might induce 83 second. So i doubt that way will work for me. Can anyone please help me with how to convert this AVI file into a vcd file without the sound going out. The initial AVI is fine its just when i have ripped the audio to a wav with VD then converted to an mpg with tmpgenc ready for a vcd.

Bellow is the VD error message then the AVI file info. Any help would be great as i am stuck on how to get this to work.

Virtual dub has detected an improper VBR audio encoding in the source AVI file and will rewrite the header with standard CBR values during processing for better compatability. This may introduce up to 83774 ms of skew from the video stream. If this is unacceptable. decompress the *entire* audio stream to an uncompressed WAV file and recompress with a constant bitrate encoder. (bitrate: 130.9+-22.4 kbps)


Audio
Bit rate 130kbps
format mpeg layer-3

video 29 fps
data rate 107kbps
Sample size 24bit
codec xvid

Please please please help.

[kupsjon]

Anyone please? i think i can remember something about changing the code with a four cc programme but im not sure if thats for this.

[ZippyP.]

Extract the audio to to a wav file and then use the wav file as your audio source. I use Goldwave to extract, just load the avi then save.

[kupsjon]

Thanks i had been ripping to a wav file first and then using this plus the avi file to convert. But i had been using virtualdub to rip the wav file. Ive tried it with goldwav instead and the 1st 10 minutes seem to be in sink. Ive now restarted it to leave it through the full file. Ill let you know at the end but it looks good. Thanks alot for your reply. Wonder why virtualdub seems to be having so many problems recently it was a great programme till now.