Problème codec virtualdub

salut
j'ai trouvé cette solution sur 2 sites différents :

Choose Start > Control Panel > Add hardware. Click ‘Next’.

Choose 'Yes, I have already connected the hardware', then click ‘Next’.

Choose 'Add a new hardware device' (at the bottom of the list) and click ‘Next’.

Choose 'Install the hardware that I manually select from a list (Advanced)', and click ‘Next’.

Select 'Sound, video and game controllers' and click ‘Next’.

Select '(Standard system devices)' and click 'Have Disk'.

Click 'Browse' when you get the 'Install From Disk' dialog box and open the C:\Windows\System32 folder.

In here you will find the mmdriver.inf file. Select it and click ‘Open’.

Click 'OK' in the 'Install From Disk' dialog box.

If you see a warning about logo compatibility, just click 'Continue Anyway'.

Now you should see a list of audio codec’s. Amongst it you should find Microsoft ADPCM Audio Codec and IMA ADPCM Audio Codec (the two that I was missing) and many others. You can install what you require from here.