the name of the GstPad in source element or NULL for any pad. [allow-none]
the GstElement containing the destination pad. [transfer none]
the name of the GstPad in destination element or NULL for any pad. [allow-none]
the GstCaps to filter the link, or NULL for no filter. [transfer none][allow-none]
TRUE if the pads could be linked, FALSE otherwise.
Links the two named pads of the source and destination elements. Side effect is that if one of the pads has no parent, it becomes a child of the parent of the other element. If they have different parents, the link fails. If caps is not NULL, makes sure that the caps of the link is a subset of caps.