ffmpeg port build failing

[Jamie Griffin]

Hello

I'm trying to install gimp from ports but one of its dependencies is
failing, ffmpeg. This is the error its failing on:

libavdevice/v412.c:41:23: erro: asm/types.h: No such file or directory
In file included from libavdevice/v412.c:42:
/usr/local/include/linux/videodev2.h:430: warning: declararion does not
declare anything
/usr/local/include/linux/videodev2.h:837: warning: declararion does not
declare anything
/usr/local/include/linux/videodev2.h:930: warning: declararion does not
declare anything
/usr/local/include/linux/videodev2.h:1478: warning: declararion does not
declare anything
/usr/local/include/linux/videodev2.h:1600: warning: declararion does not
declare anything
/usr/local/include/linux/videodev2.h:1651: warning: declararion does not
declare anything
gmake: ***[libavdevice/v412.o] Error 1

--------------------------------
(I think that's all of the relevant part of the output.)

I wondered if anyone knows what could be wrong here, and how I can get
it to build?

Jamie