Simple ansewr - I don't know.
A friend with a 3:4 DV camera captured a DV that had been used to record 16:9 footage from a 3ccd widescreen camera. The captured footage was 4:3 - I don't know whether the source camera was "fake 16:9" that needed a special decoder or whether it was captured wrong so that the sides were cut off.
Anyway, when I put it into Virtual Dub it played as a widescreen film, but a 4:3 one in Windows Media Player. It deshaked fine in VDub (apart from the strong jerks, but that was obviously not going to improve) and the output was 4:3.
I don't really know what happened as I didn't record or capture the footage, just edited it. In future I'll capture myself so I know what specs are being used. Anway, this may help and Sorry for such a vague answer.
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