The gst_parse_launch line to use for constructing the ONVIF backchannel pipeline in the default prepare vmethod if requested
by the client.
The pipeline description should return a GstBin as the toplevel element which can be accomplished by enclosing the description with brackets '(' ')'.
The description should return a pipeline with a single depayloader named depay_backchannel. A caps query on the depayloader's sinkpad should return all possible, complete RTP caps that are going to be supported. At least the payload type, clock-rate and encoding-name need to be specified.
Note: The pipeline part passed here must end in sinks that are not waiting until pre-rolling before reaching the PAUSED state, i.e. setting async=false on Sink. Otherwise the whole media will not be able to prepare.
| this | |
| launch |
the launch description |