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I recently thought about using a cheap USB HDMI capture card (7 bucks) and a RP2040(7 bucks) to build a PiKVM like device. Connecting the 2040 via serial emula

• ranger_danger 2y ago
  I think the processing power necessary to do this at modern resolutions (1080p60/4k/etc.) is way out of any rpi's league. Usually this is done on an FPGA which is exactly what makes it so expensive.
  • sandreas 2y ago
    Mmh thanks for you response. PiKVM[1] is a ready to use product an it works on >= RPI4... So if this was correct, how would you explain? 1: https://pikvm.org/ https://pikvm.org/
    • ranger_danger 2y ago
      "works" is subjective: https://docs.pikvm.org/faq/#common-questions https://docs.pikvm.org/faq/#common-questions > I am expecting to see 60fps and I am not, why? "PiKVM receives the entire signal, but then the encoding is the bottleneck. For 1080p, this is no more than 30 fps. V4 throws out every second frame of 60 hz/fps, and 30 fps is encoded. V3 and DIY can't process 60 hz and is only able to capture 50 hz, and in the same way they take every second frame, all you get out is 25 fps. The reason why V3 and DIY does not encode 30 out of 50 is that the picture will be jerky, but smooth at 25." The main website claims 1080p60 support, which is true on the input side, but that's not what you get on the output... a bit of false advertising IMO.