Digital Video Forums  

Go Back   Digital Video Forums > Video File Formats > Other File Formats

Reply
 
LinkBack Thread Tools Search this Thread Rate Thread Display Modes
Old 18 Dec 2002, 01:24 AM   #1
Junior Member
Junior Member
 
Join Date: Nov 2002
Posts: 9
Default strange audio sync

I always extract audio but this one
is really getting me frustrated.
The .avi starts out fine and then gradually
gets out of sync. Ok, no big deal....I extract
audio and shrink/stretch depending on length
of video, but this does not work (actually I usually
do this when encoding, but should work here as well).
Not only the file information shows, under VirtualDub/Frame Rate:
Source Rate Adjustment
no change (current: 23.976 fps)
change so video and audio durations match (10799.018 fps)
Of course, I get the usual error message when
opening the file:
....has detected an improper VBR...etc.
What am I doing wrong?
macyman is offline   Reply With Quote
Old 18 Dec 2002, 07:55 AM   #2
Old member
 
Join Date: Feb 2002
Posts: 5,417
Default

Sounds like you have an audio file with low sampling rate (22KHz or below), which always gives synch. problems. I have no definite fix for this, but you could try upsampling the audio to at least 44.1KHz and mux it with the original AVI file. See how it goes.
Enchanter is offline   Reply With Quote
Old 18 Dec 2002, 08:59 AM   #3
Junior Member
Junior Member
 
Join Date: Nov 2002
Posts: 9
Default

actually, the audio stream info is as follows:

sampling rate: 48000Hz
Channels: 2 (stereo)
Sample precision: 0-bit
Compression: Fraunhofer IIS MPEG Layer-3 Codec
Preload skew: 384 samples (0.01s)
# of frames: 248379

Does this help...because nothing has, yet!
Thanks
macyman is offline   Reply With Quote
Old 18 Dec 2002, 09:21 AM   #4
Old member
 
Join Date: Feb 2002
Posts: 5,417
Default

Is the audio length the same with the video's? You will need to take into account any difference between the play length and input that in the Interleaving settings.
Enchanter is offline   Reply With Quote
Old 18 Dec 2002, 10:41 AM   #5
Junior Member
Junior Member
 
Join Date: Nov 2002
Posts: 9
Default

what identifies the video length? Is it the #
of frames?
If so, it shows 142925, while audio is 248379.
Is this what you mean?
So how would I calculate digit to input
under Interleaving settings?
Thanks!
macyman is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off




All times are GMT +10. The time now is 11:42 AM.

Kirsch designed by Andrew & Austin


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright © 1999 - 2018 Digital Digest

Visit DivXLand   Visit dvdloc8.com