Blocks or unblocks the dataflow on a pad. This function is a shortcut for gst_pad_set_blocked_async() with a NULL callback.
boolean indicating we should block or unblock
TRUE if the pad could be blocked. This function can fail if the wrong parameters were passed or the pad was already in the requested state. MT safe.
See Implementation
Blocks or unblocks the dataflow on a pad. This function is a shortcut for gst_pad_set_blocked_async() with a NULL callback.