| Value | Meaning |
|---|---|
| Ok0 | link succeeded |
| WrongHierarchy-1 | pads have no common grandparent |
| WasLinked-2 | pad was already linked |
| WrongDirection-3 | pads have wrong direction |
| Noformat-4 | pads do not have common format |
| Nosched-5 | pads cannot cooperate in scheduling |
| Refused-6 | refused for some reason |
Result values from gst_pad_link and friends.