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Comment: added screencast to list of implementations

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  • Renesas Weston compositor virtual-display and gst-recorder plugin
    • virtual-display allows the creation of a composited display window the correct size which can then be remoted
    • gst-recorder GStreamer plugin in Weston Compositor encodes the virtual display using H.264 and transmits. Receiver uses GStreamer to receive and decode the stream, which can then be composited as required.
    • Pros:
      • No modification required to Weston on receiver side.
      • If layer control is required the decoded stream can be transformed as required on receiver side in gfx framework of your choosing.
      • Video encoding minimises network data and bandwidth
      • Virtual display means display size can be made only as large as needed.
      • Technology has multiple applications, e.g. has been used in Waltham implementation for gfx data transfer.
    • Cons:
      • Delay of about 2-3 vsync to encode, transmit, receive, decode and composite the stream.
      • Large display containing a lot of animated objects will impact network bandwidth
    • R-Car M3 PoC in AGL demonstrator. Open source: links TBA
      • Two M3 ECUs. Navigation and mapview app encodes mapview image using gst-recorder and transfers via ethernet (udp). Receiver mapview image, decodes the data and displays moving map image between dials of cluster display.
    • See the slides presented at the ALS 2018 talk "Remote Access and Output Sharing Between Multiple ECUs for Automotive"

2. Android ScreenCast over network to other OSs

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  • Renesas ported ScreenCast for virtual display remoting from Android
  • A virtual display screen buffer is encoded, transmitted over the network, then decoded by the receiving OS. In this way it uses some similar technology from the Weston remote implementation above.
  • Pros:
    • Widely supported transmission standard means wide variety of OSs and applications can be used on the receiving end.
    • If layer control is required the decoded stream can be transformed as required on receiver side in gfx framework of your choosing.
    • Video encoding minimises network data and bandwidth
    • Virtual display means display size can be made only as large as needed.
  • Cons:
    • Large display containing a lot of animated objects will impact network bandwidth