RMF (RDK Media Framework) integration with the hardware is strictly based on Gstreamer SoC plugins through playersinkbin, which is bin element consists of demux, audio & video pipeline. Mediaplayersink element in RMF will use SoC specific playersinkbin to play the AV. The template to implement the playersinkbin is shared in gstplayersinkbin which SoC developers can refer to implement according to their platform.
Gstreamer command to validate media client functionality : gst-launch-1.0 souphttpsrc location=<URL> ! playersinkbin
Information on the required properties and capabilities of demux, decoder and sink elements which are part of playersinkbin can be found here: RDK GStreamer Guidelines.pdf