*IVE DONE IT...AUDIO SYNC PROBLEM SOLVED*

[scooby2b2]

Hi all and yes ive done it

As some may know ive posted a few topics here asking for help with sorting out my audio sync problem with my avi's,but all have failed but now i have sorted it and now i'm gonna share it with all who is in the same boat as me.

So here we go this is the guide :-

You will need "virtual dub" , "avifix" and "tmpegenc"

1. Open the AVI in VirtualDub.

2. Save the audio portion as a WAV.

3. Close VirtualDub.

4. Run AviFix and open your AVI and WAV files (if when opening the wav file it says "audio chunk missing" or someting to that effect then go back to step 2 "in virtual dub" and click the audio menu and click Full Processing mode this will change the Audio settings to be uncompressed PCM, then save as WAV.

5.Click "Sync A/V" to match the video to the audio length

6.Save the changes to the AVI "file save avi".

7.Convert the modified AVI to MPEG with tmpegen, using the saved WAV from Step 2 for audio.

And thats it the video and audio will be in perfect sync.

I would advise that you check for bad frames before you try this guide i have 6 "large" avi files 600mb and higher but only one of then has bad frames but i have no clue as to fix thm so i did this guide on a 700mb file with no bad frames.
Also i have now done 2 "large" mpg files with just tmpegen and have no problems wit th sync so i guess its just an avi thing.

Anyways try the guide i think you will be very pleased with the results i live in england so all my converting is in PAL.

Please post back and let me know how you got on or if your stuck but beleive me its as easy as 123.

Have fun and bye for now.

P.S i was gonna put pics on this guide but i couldnt figure out how to.

[Tommyknocker]

Remember, there are two types of audio synch problems. There is static synch, and drift synch. Static is when the audio starts out of synch and remains through out the movie. The audio is usually equal to the video in lenght when this problem is present. Audio drift is when the movie starts out fine, then slowly goes out of synch more and more as the movie plays. The lattter is sometimes caused by the length of the audio not matching the length of the video, which is what your solution addresses.

However, you did not take the former problem into account when you posted your solution. Neither did you make this post a guide so the moderators can publish it properly. The problem here is that your solution can nail the drift audio problem most of the time, but now it is only a good post, and subject to disappear after a time. I suggest you submit it as a guide, after you complete your research to take into account the former problem. Not bad.

[scooby2b2]

hi again,

Sorry i did rush th guide a bit as i anted to get i on the forum quick.
i will do more reserch and then make a proper guide.

The sync problem was a "drift" sync.....started out ok then the gap between audio and video got bigger after about 40 mins of playback.

I will make a guide wit pics (though i dont think you'll need pics as it is very easy to do....train a monkey if you like...lol).

I've done 2 large avi's no and before they was out of sync every which way i did them but now both are sync free.

Thanks for your reply tommy and thanks for the advice.

[Bob W]

My audio sync problems were solved when I bought the Panasonic E50 recorder.

[scooby2b2]

Hi bob,

Thats great to hear but i really didnt want to spend out more money for another dvd writer........but hey if theres peeps out there looking to buy maybe the same one as you would be wise.

Thanks for pot bob

[jimmalenko]

I have been having the same problem with some AVIs I have captured from VHS music videos. I capture uncompressed video AND audio but I seem to have some drift as the lip synch is fine at the start but gets progressively worse. I have been trying to locate this AVIFix but all I came across was this Video fixer 3.23. Can anyone verify if this is the same thing or allude to where I can locate AVIFix ?

[scooby2b2]

The link for avifix is

http://lilly.csoft.net/~jeffryj/projects/avifix.zip<br /> <br /> it's NOT "avifix jo....png[/img]

[scooby2b2]

lol i really cant see how to put pics on

[spiderman2k1]

I was having alot off audio sync problem way back and start to use ATI AIW and never had a problem again also I heard Canopus card's are good never get audio problem's

[jimmalenko]

Thanks Scooby. I will give it a go and post my results !

[xtreemkareem]

This audio chunk not found thing is really starting to make sense now. I've been having drift audio problems with every single DivX I encoded using every single encoder - almost. I use DVD Decrypter to rip my vobs and DVD2AVI to demux or decode the audio. But I notice that the audio (AC3 or WAV from DVD2AVI) is always longer than the video but simply won't sync i I do the sync to audio thing. Any explanation as to why I get this whole missing audio chunk thing? DVDx when directly encoding from the AC3 in the vob audio makes note of the audio chunk error. Any explanations???

[scooby2b2]

xtreem.

Launch DVD2ONE (after youve used dvd decrypter to rip to hard drive)

1. Choose the source where you ripped the DVD files.
2. Choose a new destination, create a new empty VIDEO_TS folder. It requires a 4.38 GB new free HD space.
3. Select Full disk under Copy Mode if you want to keep all menus and extra materials. If you only want the main movie choose movie-only under Copy Mode. If you choose movie-only you will get a bit better video quality, especially if it is very much extra materials and big menus. But if you want everything you must use Full disk.
4. Hit Next
5. Select which audio tracks you want to keep. If you remove many audio tracks the video quality may improve a bit.
6. Select which subtitles you want to keep.
7. Select Angle 1.
8. Hit Next to convert to one DVD

It will take about 15-30 minutes

then use to burn the VIDEO_TS folder.

I think this is what you want to know.

jimmalenko.

your welcome remember post your results.

spiderman.

i take it your on about sound cards ??...if so why i didnt think that had anything to do with what this topic is about ?....let me know what your on about.

until next time......happy converting

[xtreemkareem]

I don't think your getting my drift. My porblem is that all the DivX's I encode from a DVD have drift sync with the audio. Although saving the avi audio as uncompressed and recompressing again solves the problem, it takes too long and there is audio quality loss. All I'm trying to do is understand why when encoding my DivX avis, I just about ALSWAYS get the stupid audio sync problems, no matter what encoding app I use.

[mnkyboy]

I have this "audio drift" sync problem with my captured TV shows I do with my Leadtek 2000XP Deluxe card. The files playback fine on my computer before I author them with TMPGEnc DVD Author, but after they are processed, audio drift happens. It starts out fine, but then it goes out of sync.

What exactly is the cause of this? Bad frames? Is there a way to fix this in a MPEG file? I capture to MPEG mainly becaues I dont want to rencode the AVI file, and also because I dont have a huge harddrive to handle AVI capture (40GB to play with).

Any suggestions appreciated. Thanks.