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Audio shrinkage and pitch change


Mike Nomic

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Installed, launched directly ... heading shows "MPC-BE.1.5.4.4969.x64.exe - VLC media player"

Below that is a set of headings - Media, Playback, Audio, Video, Subtitle , Tools, View, Help ...

NO file menu ...Clicking on the white band at the top of the screen gives a option list - Restore, Move, Size, Minimise, Maximise, Close

 

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Though it's not clear why some of your muxed files don't have the 'shrinkage' issue, a demuxing utility can process those that do.  Here's a suggested procedure...

1.  Use the demuxer utility to create an Mp3 file of the audio

2.  Import the project

3.  Unlink audio

4.  Substitute the Mp3 for the entire audio track

That's what worked here. Then the project was exported from an SSD drive as an Mp4 at default settings.  Other formats may also succeed.

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Research by a developer found that the two files do have differences.  In the future, VP may handle them.

If your DVcam provides the option of 12 bit PCM 32kHz or 16 bit PCM 48khz, try the latter.  VP doesn't support the former.

For now, when you encounter 'shrinkage', consider employing an external demuxer as outlined above.

 

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We have some more information to report about the chipmunk audio problem.  It seems like if you use the window 7 default FireWire application that records FireWire that may be the problem with the audio header being skewed from the video.  My brother Jerry will make a post about this later, but this is a heads up that using versions 8.0 our solution to the problem was to use Pinnacle version 21 to retrieve all mini DV tapes and VideoPad works fine.  When we use the default application that retrieves FireWire the video plays fine but once we export from VideoPad we have the audio being skewed wrong.  It seems like we get about two thirds of the audio and then 1/3 flatline where the audio that we do receive sounds high-pitched like the Chipmunks.  He was able to divide and conquer the problem down to just a 6 minute video that once he reduced the video to about 4 minutes the problem went completely away.  So my thoughts was maybe it was in the header that somehow VideoPad might be read it a little weird and cause problems.

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  • borate changed the title to Audio shrinkage and pitch change

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