Webrtcsink latency

[slomo]

@FabPoll

I’ve had to add a queue, otherwise there’s the warning

0:00:00.232523955 45429 0x3fc14c0 WARN basesink gstbasesink.c:1249:gst_base_sink_query_latency: warning: Pipeline construction is invalid, please add queues.

queue2 does not remove this same warning BTW. I’ve played with various parameter of queue without success (latency remains the same). Also I’ve always have this warning when streaming starts

That’s expected. You would add a queue of suitable size to allow for compensating the latency difference between the different streams (e.g. if your audio stream has 500ms latency and the video stream 200ms, then the video stream needs an additional 300ms of buffering at least). This will not increase latency. See this explanation about the min/max latency and generally how latency works in GStreamer.

@FabPoll

0:00:18.324681033 45787 0x7f25f8061400 WARN webrtctransportsendbin transportsendbin.c:457:gst_transport_send_bin_element_query: did not really configure latency of 0:00:00.000000000

Not sure what it means.

That means that at this point at least latency configuration was not successful (the LATENCY event was rejected by upstream). The debug logs will contain more information about what went wrong there.

Most likely you’ll get a LATENCY message on the bus at a later time, and then via gst_bin_recalculate_latency() it should end up with a valid latency configuration. Or possibly even without you having to do anything at all.