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| blendermann |
| Posted: Aug 30 2012, 06:56 AM |
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Advanced Member
Group: Members
Posts: 50
Member No.: 20723
Joined: 22-January 07
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Hello,
have a long (about 2 hours) video. And I've put together several small film parts. Now I have the problem that the video is not quite syncron. So the sound is a few seconds too soon. At the beginning of that will ever happen. The problem is, unfortunately, only in the middle of the film. Is there a way to fix the problem somewhat. |
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| dloneranger |
| Posted: Aug 30 2012, 03:22 PM |
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Moderator
Group: Moderators
Posts: 2366
Member No.: 22158
Joined: 26-September 07
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Somewhere, one of the files has audio that isn't quite as long as the video
This can easily happen with compressed audio, as the audio is saved in blocks, and the chances of a block ending at exactly the same time as a video frame is quite small
(Or the audio length could just be shorter)
When the files are joined, they're all pushed together, so the next files audio gets moved a bit earlier than it should be
There are 2 easyish ways to try and sort it out
1)
Save each file seperately, converting the audio to uncompressed pcm
Join those files, an hopefully the audio will now be in sync
2)
Just join the files together in an AviSynth script
Load that into virtualdub and the audio should be ok
A script for that would look like
avisource("c:\file1.avi")++avisource("c:\file2.avi")++avisource("c:\file3.avi")
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MultiAdjust JoinWav WavNormalize FFMPeg Input Plugin v1827 UnSharpMask
Windows7/8 Codec Chooser
All FccHandlers Stuff inc. Installers for acm codecs AAC, AC3, LameMp3 |
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