Sets the capabilities of this pad. The caps must be fixed. Any previous
caps on the pad will be unreffed. This function refs the caps so you should
unref if as soon as you don't need it anymore.
It is possible to set NULL caps, which will make the pad unnegotiated
again.
Sets the capabilities of this pad. The caps must be fixed. Any previous caps on the pad will be unreffed. This function refs the caps so you should unref if as soon as you don't need it anymore. It is possible to set NULL caps, which will make the pad unnegotiated again.