Gst.PadLinkReturn
Result values from gst_pad_link and friends.
- PadLinkReturn.OK
link succeeded
- PadLinkReturn.WRONG_HIERARCHY
pads have no common grandparent
- PadLinkReturn.WAS_LINKED
pad was already linked
- PadLinkReturn.WRONG_DIRECTION
pads have wrong direction
- PadLinkReturn.NOFORMAT
pads do not have common format
- PadLinkReturn.NOSCHED
pads cannot cooperate in scheduling
- PadLinkReturn.REFUSED
refused for some reason