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Using raspberry pi 3 b+ to stream over ethernet

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Zhaniyarnurlan
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Can raspberry pi 3 b+ be used as written in this post?:
https://dev.intelrealsense.com/docs/depth-camera-over-ethernet-whitepaper
I am using d455 and need to stream 1280x720 resolution with 6 fps(or just get frame when i need it, did not find such an option).
does 1 gb ram and base ethernet suits this task or in order to achieve it i need to somehow process the stream inside raspberry before sending it further through ethernet.
One more question, does using the ethernet as power source decrease its transmitting speed? 

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  • MartyG

    Hi Zhaniyarnurlan  Although the ethernet networking system that you linked to supports 1280x720 at 6 FPS, the D455 camera model does not support it as its minimum FPS speed is 5 FPS instead of 6 and so 640x480 / 15 FPS would likely be the highest resolution / FPS that could be used with your D455.  

     

    Also, this ethernet system is being removed from the RealSense SDK in the next SDK release after the current one (which will likely be numbered 2.54.0).  This is because it was an experimental proof of concept rather than an official, validated feature of the SDK  So you would not be able to update the SDK version in your project in future if you wish to continue using this networking tool.

     

    If you are able to use Python in your project then there is an alternative networking tool called EtherSense that should continue to be available in upcoming SDK versions.

    https://github.com/IntelRealSense/librealsense/tree/master/wrappers/python/examples/ethernet_client_server

    https://dev.intelrealsense.com/docs/depth-camera-over-ethernet-whitepaper

     

    If you are referring to using a PoE Hat for power then it does not make a difference to ethernet connection speed as far as I am aware.  Ethernet is faster than USB 2 but slower than USB 3.

     

    It would be ideal to use Pi 4 instead of Pi 3B+.  If you need to use 3B+ and its 1 GB of memory then I would recommend increasing the swapfile size to create more 'virtual memory' (memory created from your storage drive space that is slower than real memory).

    https://pimylifeup.com/raspberry-pi-swap-file/

     

     

     

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