Cannot append avi with processed audio in virtualdub

[ackboo]

Hello,

I digitized some home movies with a digital8 camcorder, now I have a few Gb of dv-avi that I am currently editing with virtualdub.

I noticed some audio problems along the way, on some parts of the files there is no usable sound in the right stereo channel.

To solve this problem on smaller clips I just :
-exported the raw audio using virualdub
-imported the raw audio in audacity
-split the stereo to 2 mono channels
-deleted the right stereo channel that is full of noise
-exported to wav using ffmpeg pcm s16le
-imported the wav in virtualdub

This solution works for single files but I cannot append an avi with processed audio to an untouched avi. Virtualdub says :
Cannot append, the audio streams have different sample sizes (4 vs 2)

mediainfo for a raw avi:
Audio
ID : 1
Format : PCM
Format settings, Endianness : Little
Format settings, Sign : Signed
Codec ID : 00001000-0000-0100-8000-00AA00389B71
Duration : 1mn 52s
Bit rate mode : Constant
Bit rate : 1 536 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Stream size : 20.6 MiB (5%)
Alignment : Aligned on interleaves
Interleave, duration : 40 ms (1.00 video frame)
Interleave, preload duration : 500 ms

mediainfo for a processed through audacity avi:
Audio
ID : 1
Format : PCM
Format settings, Endianness : Little
Format settings, Sign : Signed
Codec ID : 1
Duration : 1mn 52s
Bit rate mode : Constant
Bit rate : 768 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Stream size : 10.3 MiB (3%)
Alignment : Aligned on interleaves
Interleave, duration : 40 ms (1.00 video frame)
Interleave, preload duration : 500 ms


So my question will be how to remove one stereo channel and import processed audio in virtualdub while at the same time being able to append avis ? Or do I just need to convert all the audio to wav and work from here ? Is there a better way ?

[ackboo]

Ok so I solved my problem, sort of.

I extracted all the audio, converted it to wav (microsoft), made a new version of the raw dv-avi with wav audio and started to edit that.

I decided to remove one stereo channel and duplicate the sane one to make a fake stereo file that I can merge to the dv-avi. The resulting files can be appended easily.

There is still some noise left on that fake stereo file, what is the best practice to get rid of it?

[manono]

So my question will be how to remove one stereo channel and import processed audio in virtualdub while at the same time being able to append avis ?

Convert your single channel audio to dual channel. Did you even have to ask?

There is still some noise left on that fake stereo file...

Not all the noise was in the right channel you removed?

...what is the best practice to get rid of it?

Run it through the Audacity noise reduction filter and try not to screw it up. There are instructions in the tutorial for the noise reduction filter.