VirtualDub append DV: mismatch detected in opaque codec ...

[peter_b]

[PROBLEM]
I tried to append a computer generated video with black-only frames, encoded in DV.

Unfortunately, when trying to append that black-video in virtualDub to an existing DV-video, I got the following error:
Cannot append wsegment
<filename>: The video streams have incompativle data formast.

(mismatch detected in opaque codec data at byte 21 of the format data.)

I've used the Matrox DV codec for encoding.

So I tried to encode the black into DV using "ffdshow-tryouts", but got the following error when trying to save the file in Virtualdub:

Cannot start video compression:

An unknown error occurred (may be corrupt data).
(error code -100)

Still looking for a solution