argus to tcpdump conversion

[Scott A. McIntyre]

Hi,

I need to somehow export a series of argus data files into tcpdump
format for portability purposes (a series of tools that are already
built around tcpdump; at some point I'll convert to ra and client
friends, but until then...).

I thought that a:  

argus_linux -r argus_capture_file -w - | tcpdump -w tcpdump.out -r - 

would do it, but, that generates a:

argus_linux[12043]: ArgusInitSource: Unknown packet file format

Must be something obvious...

Thanks,

Scott