BaseSink.queryLatency

bool queryLatency(out  bool  live,  out  bool  upstreamLive,  out  gst.types.ClockTime minLatency,  out  gst.types.ClockTime maxLatency)

Query the sink for the latency parameters. The latency will be queried from the upstream elements. live will be true if sink is configured to synchronize against the clock. upstream_live will be true if an upstream element is live.

If both live and upstream_live are true, the sink will want to compensate for the latency introduced by the upstream elements by setting the min_latency to a strictly positive value.

This function is mostly used by subclasses.

Parameters

`live`	if the sink is live
`upstreamLive`	if an upstream element is live
`minLatency`	the min latency of the upstream elements
`maxLatency`	the max latency of the upstream elements

Returns

true if the query succeeded.