| Value | Meaning |
|---|---|
| OK0 | link succeeded |
| WRONG_HIERARCHY-1 | pads have no common grandparent |
| WAS_LINKED-2 | pad was already linked |
| WRONG_DIRECTION-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 |
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Result values from gst_pad_link and friends.