Virtualdub Audio Sampling Rates

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Audio out of sync after VirtualDub - digitalFAQ Forum

http://www.digitalfaq.com/forum/video-web/6169-audio-sync-after.html#:~:text=Your%20audio%20sampling%20rate%20should%20be%2048KHz%2C%20not,up%20that%20way%2C%20you%20can%20click%20on%20%22Conversion.%2F.%22

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Virtualdub and sampling rates | AfterDawn Discussion Forums

https://forums.afterdawn.com/threads/virtualdub-and-sampling-rates.738920/

To correct it, close out VDub and load the file with the 44100 rate (these are my examples - you have to figure out your case as far as stereo, mono etc). Video > Direct Stream Copy Audio > Full Processing Mode Audio > Conversion Set new sampling rate to 48000 'OK' Audio > Compression Select the codec (I use Lame MP3) 48000 128kbps

Audio filter reference - VirtualDub Documentation

https://documentation.help/VirtualDub/audio-filters.html

The transition band is ~1.4KHz at 44KHz sampling rate, and as a result, very sharp downsampling, such as 44KHz to 8KHz, may result in some aliasing. This sounds a bit like a halo. You can reduce the aliasing by applying a low pass filter with a cutoff ~700Hz lower than half the source or half the target sampling rate, whichever is lower.

Joining AVI files in VirtualDub - Different sampling rates ...

https://forum.videohelp.com/threads/217822-Joining-AVI-files-in-VirtualDub-Different-sampling-rates

If the audio sampling rates are different (or it is VBR MP3), then follow the instructions about converting each avi to uncompressed audio. Then, when you join them, you can re-encode the audio to Mp3 (if that is what you want) by using full processing mode for the audio in virtualdub. It's possibly because of VBR MP3 audio.

AVI timing and audio sync - virtualdub.org

https://www.virtualdub.org/blog2/entry_027.html

A start value of 2 for a 25 sample/sec stream would mean 80ms of dead time before the first sample starts. Generally this is filled in by extending the first sample backwards in time. VirtualDub does not yet support non-zero start values. (I need to fix this.) The sample size (dwSampleSize) determines the sample-to-chunk mapping. If it is zero, one sample is stored …

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