Lip synch Problem with DV/ AVI - Desperation !

Vincej · Post by **Vincej** » Sun Mar 11, 2007 8:18 pm

Hello all - I have reached a point of exasperation. I had always believed lip synch problems only happened with analogue sources - never DV/AVI sources. I have read the materials on the forum pages re the technical background - but I am still seeking a *solution* on how to fix the problem not why the problem might be there. I use VS9

The objective is to burn a 60 min DVD from 60 mins of DV/AVI. All I am adding is chapters - Nothing else.

I have tried now 4x. Each attempt has resulted in a 1/4 sec. lip synch problem by the time I get 45 mins through the finished DVD. It starts out great. I have tried each audio format: Mpeg layer2, PCM, Digital Dolby. I have also tried first making a video file from the original. Nothing has worked. Working out the stats there are no dropped frames during capture.

Can some one please provide a solution ? Many Thanks Vince,

Specs:

Video Clip Properties

Microsoft AVI files - OpenDML
24 Bits, 720 x 480, 4:3, 29.97 fps
Duration: 3654.421 seconds
Data Rate: 1272.73 kbps
DV Video Encoder -- type 1
Total Frames: 109,523
DV Audio -- NTSC, 32.000 kHz, 12 Bit, Stereo

Project Template Properties:

NTSC drop frame (29.97 fps)
Microsoft AVI files
24 Bits, 720 x 480, 4:3, 29.97 fps
Lower Field First
DV Video Encoder -- type 1
DV Audio -- NTSC, 32.000 kHz, 12 Bit, Stereo

MPEG Properties for file conversion: Note I have tried different audio compression formats

MPEG files
24 Bits, 720 x 480, 29.97 fps
Lower Field First
(DVD-NTSC), 4:3
Video data rate: 7500 kbps
Audio data rate: 224 kbps
MPEG audio layer 2, 48 KHz, Stereo

sjj1805 · Post by **sjj1805** » Mon Mar 12, 2007 1:57 am

Obviously if we can cure the problem correctly that would be much better.
In the meantime you can get by with this last resort method:
VS & MSP: Fix for Out of Synch Audio/Video

Vincej · Post by **Vincej** » Mon Mar 12, 2007 2:26 am

Thanks Steve, This could work for this particular video - my concern is that I am doing something fundamentally wrong and that for the rest of my life I am going to be struggling with lip synch problems unless I get my technique right.

From the stats can you see anything wrong with my set up ?

Many Thanks Vince

sjj1805 · Post by **sjj1805** » Mon Mar 12, 2007 2:32 am

Nothing that hits me in the face but someone else might notice something.
You may be interested in the tutorial
From camcorder to DVD with VideoStudio where I have outlined the procedure I use.

Are you using an IEEE1394 (firewire) cable?

Black Lab · Post by **Black Lab** » Mon Mar 12, 2007 2:40 am

Working out the stats there are no dropped frames during capture.

Have you enabled the drop frame counter to be positive? If not, I would turn it on (File>Preferences>Capture Tab>Show Drop Frame Info) and capture again.

Vincej · Post by **Vincej** » Mon Mar 12, 2007 8:59 pm

Yes I use 1394 and I am also using the drop frame counter - however, without recapturing I can also calculate that no frames were dropped.

Just a thought : I burned using constant bit rate of 7500. Would 2 pass variable cure it ? Also on the project options I set the quality slider to 100% - any issue there ?

Thanks Vince

Black Lab · Post by **Black Lab** » Mon Mar 12, 2007 9:21 pm

You don't really say, but I assume the captured clip shows no lip sync problem? The problem only arises after burning, or does the mpeg also suffer from OOS?

Is your clip one long 60 minute clip? If so, I wonder what would happen if you just split the clip into, say, 3 clips of 20 minutes?

I'm not sure if 2-pass would cure it. I always set my slider to 100%.

Vincej · Post by **Vincej** » Mon Mar 12, 2007 10:14 pm

Thanks Black Lab - yes the clip is 60 mins long. he problem only arises after burning - it is great both on Windows Media and inside the VS previewer - it is definitely something inside the Avi to Mpeg conversion stages.

IO don't understand what you mean by "or does the mpeg also suffer from OOS". In my mind It becomes an Mpeg only during the conversion and burn stages.

Moving it to 3 separate clips I think would only work if I created 3 separate DVD's surely ?? Moreover I would have hoped that I could create a single 60 min DVD.

Many Thanks Vince

Post by **Ron P.** » Mon Mar 12, 2007 11:10 pm

Vince,

I think what Blacklab is suggesting, is if the MPEG is 1 long 60 minute clip, try splitting it into 3 smaller clips. Sometimes the OOS (Out Of Sync) or lip sync problem occurs gradually, and having smaller clips may allow it to stay in sync.

If you rendered a video file, Share>Create Video File, then opened the burn module, and inserted your newly created DVD compliant MPEG-2, and the MPEG-2 did not have any OOS problems, I would guess that the MPEG-2 file had become corrupt during the burn.

Also I just noticed that your Burn Properties are not quite correct.

MPEG Properties for file conversion: Note I have tried different audio compression formats

MPEG files
24 Bits, 720 x 480, 29.97 fps
Lower Field First
(DVD-NTSC), 4:3
Video data rate: 7500 kbps
Audio data rate: 224 kbps
MPEG audio layer 2, 48 KHz, Stereo

Since you are in NTSC land, you should be using either LPCM audio or Dolby. For NTSC MPEG audio is not in the DVD Spec. Try burning using Dolby, either 5.1 or AC-3 (2 channel).

Vincej · Post by **Vincej** » Mon Mar 12, 2007 11:44 pm

thanks VidoMan - I think you might have just found the problem

In your below comment you infer that I should build a video file and save it as an *Mpeg* - Correct ?????

I have tried creating a video file first - But I saved it using the "same as project settings" . This created just another identical NTSC AVI file. It did not help the OOS.

Up untill now I just go straight from the avi, then I apply chapters then into a burn. Using this approach I have tried all three different audio formats but each time had OOS by min 40 of a 60 min dvd.

Please confirm if this could be the problem - I'm dancing already ! Many Thanks Vince

If you rendered a video file, Share>Create Video File, then opened the burn module, and inserted your newly created DVD compliant MPEG-2, and the MPEG-2 did not have any OOS problems, I would guess that the MPEG-2 file had become corrupt during the burn.

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Black Lab · Post by **Black Lab** » Tue Mar 13, 2007 3:52 am

You are doing no editing as I understand it, so, with your clip in the timeline:

1. Click on the Share tab and choose Create Video File, choosing NTSC DVD as the template. This will produce a DVD compatible mpeg file.

2. After that new mpeg file is done rendering, click on File>New Project.

3. With nothing in the timeline, click on the Share tab, then Create Disc.

4. At the top of the next screen are 4 icons. Click on the left one, Add Video Files and choose the mpeg that you created in step 1.

5. Click on the Add/Edit Chapter button to add your chapters. Uncheck the Create Menu box. Click Next.

6. Click Next to proceed to the burn screen. If you have an RW you would like to burn to that's fine. If not, uncheck Create To Disc, and check Create DVD Folders. Then when it's done you can play the DVD files on your HD with PowerDVD or whatever player you have on your pc.

That is the basics of what we call the Recommended Procedure for when problems occur (note I did not say the "B" word).

Let us know how you make out.