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video/audio synchronisation

 
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xdzgor



Joined: 24 Sep 2007
Posts: 3

PostPosted: Mon Sep 24, 2007 7:38 pm    Post subject: video/audio synchronisation Reply with quote

Hi - I have downloaded the trial version of Gear Video to try it out, as I have a heap of old Digital 8 camcorder tapes I want to store on DVD. My first attempt has resulted in a good quality video + audio on my DVD (fine enough for me anyway), but they are not in sync - that is, the sound comes about a second before the action.
What could be the problem?
Thanks, Peter
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Blackwood


Last edited by xdzgor on Thu Feb 03, 2011 6:22 am; edited 1 time in total
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Albert
GEAR Guru


Joined: 30 Mar 2006
Posts: 135

PostPosted: Tue Sep 25, 2007 9:20 pm    Post subject: Reply with quote

This has happened with a customer before in the past, and the issue was being caused by some other codecs he had installed on his system.

GEAR Video makes use of DirectShow filters use of your drivers for the handling of your Camcorder.

You are plugging this in through a FireWire connection, correct?

Basically my assumption is that you are getting the content from a video recorder plugged into your computer via a firewire cable, is this correct?

-Albert
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xdzgor



Joined: 24 Sep 2007
Posts: 3

PostPosted: Wed Sep 26, 2007 7:32 am    Post subject: Reply with quote

Hi, thanks for the reply. Yes, I have connected my Sony Digital 8 video camera via firewire to my computer.

/Peter
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grape ape marijuana strain


Last edited by xdzgor on Thu Feb 03, 2011 6:22 am; edited 1 time in total
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Albert
GEAR Guru


Joined: 30 Mar 2006
Posts: 135

PostPosted: Wed Sep 26, 2007 12:43 pm    Post subject: Reply with quote

Right after you capture the video from you camera if you load the large AVI file in Windows Media Player or some other player is the sound and video out of sync right away?

Or is the sound out of sync AFTER it is encoded to MPEG2?

Or is the sound out of sync AFTER it is burned and on DVD only?

Thanks for being patient with me, I am trying to isolate where this is occurring, I am guessing the sound is out of sync direct after capture, please let me know...

Also it was suggested to me, to ask you to try a small capture, of just a few minutes to see if the sound is in sync on this...

You never specified how long the file is you are capturing, but sometimes file size our other system resources can wreak a little havoc during the muxing process.

-Albert
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xdzgor



Joined: 24 Sep 2007
Posts: 3

PostPosted: Wed Sep 26, 2007 8:43 pm    Post subject: Reply with quote

Hi

the avi file is ok - sound and video in sync, but the mpg file is out of sync (and so is the DVD).

The video file (avi) is about 3.6GB - it's about 20 min of video. The resulting mpg file is about 1.2GB.

Thanks for your help.
Peter
________
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Last edited by xdzgor on Thu Feb 03, 2011 6:22 am; edited 1 time in total
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Albert
GEAR Guru


Joined: 30 Mar 2006
Posts: 135

PostPosted: Thu Sep 27, 2007 7:20 pm    Post subject: Reply with quote

Hello,

What you can try then is this, go to Edit->Preferences... F4 also goes there with one click.

Select the Video Editor Settings Tab in the dialog.

Click on the "Select Codec" button.

UNSELECT any codec that is NOT in this list I am going to actually type out by hand... ugh... Crying or Very sad

AVI Decompressor
AVI Draw
Color Space Converter
DivX Decoder Filter
DivX Subtitle Decoder
Divx Subtitle Decoder 0013
DV Video Decoder
Indeo(R) video 4.4 Decompression Filter
Indeo(R) video 5.10 Decompression Filter
MainConcept MPEG Video Decoder
Microsoft MPEG-4 Video Decompressor
Microsoft Screen Video Decompressor
MJPEG Decompressor
MPEG Video Decoder
Mpeg4 Decoder DMO
Mpeg43 Decoder DMO
Mpeg4s Decoder DMO
Overlay Mixer2
QT Decompressor
VBI Surface Allocator
VGA 16 Color Ditherer
Video Port Manager
Windows Media Video Decoder
Windows Media Video Decoder
WMV Screen decoder DMO
WMVideo Advanced Decoder DMO
WMVideo Decoder DMO

WHEW..... Shocked

Like I said UNSELECT any codecs not listed above... if there are a couple codecs up there you do not have in your list, that is fine, these are the codecs currently installed on my system.

After you do that, load the Video Editor.

In the video editor add the large AVI file, and save it, it will encode it during this save.

Now check the encoded file to see if it ALSO has the sound out of sync. If it is not out of sync, then there is a conflict with your codecs...

If you go through this laborious step please tell me the results.

-Albert
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neilwilkes
GEAR Guru - 500 Club


Joined: 17 Apr 2005
Posts: 604
Location: London, England

PostPosted: Mon Oct 01, 2007 2:09 pm    Post subject: Reply with quote

Just to add to what Albert has posted.
DirectX (or DirectShow) uses a MERIT system for loading & using installed codecs. Now - this is not as common as it used to be, but there are 3rd party applications that will load their own versions of common codecs to your system, and then to make it all much worse they will set their own merit to this, making it sometimes impossible for any other codecs to be used.
Microsoft did try to prevent this being done, but got slapped with an Anti-Trust suit as this would (allegedly) prevent these 3rd party from selling their rubbish - and that is frowned upon!
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