=========================================
videodevs.h
=========================================
struct video_capability
{
        char name[32];
        int type;
        int channels;   /* Num channels */
        int audios;     /* Num audio devices */
        int maxwidth;   /* Supported width */
        int maxheight;  /* And height */
        int minwidth;   /* Supported width */
        int minheight;  /* And height */
};
=========================================


=========================================
webcam.h
=========================================
#include "videodevs.h"
struct video_capability vCaps;
=========================================


error when compiling:
webcam.h:186: error: field `vCaps' has incomplete type