Check your manual which codec supported. I believe only DivX supported. XviD and other (like H264) may not supported.

FFDS maybe short for ffdshow (did you install it in your system ?).

To make it playable in your Pioneer, you need to encode it. But, I'm not sure H264 can be changed into DivX using 4CC changer. If can, you save lot of time encoding H264 to DivX.