The Avid Cinema Card has a 60-pin connector and comes with a 60-pin ribbon cable; therefore, it must be used with the Video-In Card, Rev. D, which also has a 60-pin connector.
The Avid Cinema card was not tested with and, therefore, is not compatible with the older Video-In Card, Rev. B.
The Apple MPEG card has a 34-pin connector and comes with a 34-pin ribbon cable. This cable can be used with the older Video-In Cards, Rev. B and A, which also have a 34-pin connector, but not with the Video-In Card, Rev. D. To connect the MPEG card to the Video-In, Rev. D card, you will need to use the 34-pin to 60-pin, MPEG to Video-In, Rev D cable.
The part number for the MPEG to Video-In, Rev. D Cable is 922-3420.