AVI: Stream 1 (audio) has a non-zero start position

[kingcrimsonster]

You didn't provide a sample. You didn't even mention what VirtualDub version you are using.

Sample

what VirtualDub version you are using

Build 35576 (1.10.5, experimental): [October 13, 2014]

you can try whether switching mencoder and/or ffmeg

Thank you for helpful advice:
'Config' - 'Containers' - 'Avi settings' - I check box "Always use ffmepg for muxing".
After this - no problem.