RDK with GStreamer-V4L2 video accelerator and Freedreno graphics overlay

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" summary

RDK is running on a Qualcomm 96Boards DragonBoard 410c with the RDK media framework wired to GStreamer-V4L2 to use the SoC hardware decoder, offloading HD video decode so CPU stays low; video is scaled and a rotating triangle overlay is composited via the open source Freedreno driver and the Westeros Wayland compositor, showing smooth 1080p playback without stutter and synchronized audio; demo proves hardware decode offload plus a GPU overlay works end to end on this board.

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