pub unsafe extern "C" fn libmv_FrameAccessorNew(
user_data: *mut libmv_FrameAccessorUserData,
get_image_callback: libmv_GetImageCallback,
release_image_callback: libmv_ReleaseImageCallback,
get_mask_for_track_callback: libmv_GetMaskForTrackCallback,
release_mask_callback: libmv_ReleaseMaskCallback,
) -> *mut libmv_FrameAccessor