*audio sync guides*

[scooby2b2]

Hi all (again)

I really need a guide to sort out this audio sync problem,i know im not the first to say about this as this is a major problem for lots of people i've tried so many different ways to make a dvd hoping the problem will go away but i'm still gettng the same problem.......i've just found out that the avi's im trying to ecode,author ect. is "audio format - lame mp3 and video compression - divxmpg4 v3".

How the hell do you do it ?....i thought it would be as simple as 123,so thats why i spent money on a dvd burner,though i have great results with doing dvd to dvd using "dvd decrypter".

There must be a way to do it is there any other info anyone needs to help wit this problem ?.

Many thanks to any reply.

And if anyone makes an all in one guide to put avi's onto dvd with the audio problem gone wil be an all time saint !

[dcapp1]

I also have this problem, and I have a post similar to your problem. These posts just don't seem to be getting answered by anyone. That must mean that nobody has figured it out yet. My suggestion is to use VirtualDub to mask out the bad frames. This might work for you. I'm still trying to get this problem resolved, byt to no avail.

[ZippyP.]

Here's what I do:

1. Check and delete bad frames using Virtualdub, link below.

2. Extract the audio to wav with Goldwave, just load the avi then save.

3. Load the avi into Vdub, use the wav audio command and load the wav file too. Play them together in Vdub and check for sync at different points in the video. Adjust the audio delay in Vdub if necessary (audio>interleaving>delay audio track). This is the point where sync needs to be fixed, if you can't fix it here then go no further. Save the adjusted wav.

4. Encode your video, if you're making an S/VCD use the wav as your audio source.

5. Author and burn.

[FulciLives]

I use a PCI TV tuner type capture card.

Here is a method I just discovered that works great.

Use iuVCR or TheFlyDS and set the master stream to AUDIO.

This should keep everything in sync and when you load your AVI capture into VirtualDub not only should it be in sync 100% but also should have identical numbers for the VIDEO and AUDIO FPS values. If it is in sync but the video and audio FPS don't match then change it to match and do a direct stream SAVE copy of it. Make sure to load it and check for sync.

Anyways ...

You have a synced capture now but you synced the video to the audio and the chances of you having exactly 29.97fps NTSC or 25fps PAL is very unlikely.

Chances are the FPS is just "off" a bit. For instance a NTSC capture might be 29.528 or 30.062 or something like that etc.

Use an AviSynth script to load your capture into your encoder. This works with CCE, TMPGEnc, Mainconcepts etc.

In the script use this line:

For NSTC use:
AssumeFPS(29.970, true)

For PAL use:
AssumeFPS(25.000, true)

Now your VIDEO and AUDIO will be the "perfect" frame rate and be in sync.

I actually run the AviSynth file though CCE for the video then again through TMPGEnc but just for the audio (I do LPCM) then convert the LPCM WAV file to AC-3

Been working like a charm for me

- John "FulciLives" Coleman

[scooby2b2]

thanks guys for the reply i'll give em ago and i'll post back and let you all know wether ive sorted it.

[scooby2b2]

nope still no joy !