C792 hdmi csi 4k

PiKVM PiKVM DIY
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I have ordered blindly C792 HDMI module. Geekworm C792 HDMI to CSI-2 converter module with HDMI loop out supports I2S audio output for Raspberry Pi 5B/4B//3B/Zero/CM5/CM - AliExpress
I was hoping it will be like plug and play… It works but maximum resolution is fullHD.

Would it be possible to stream 4K (or less) with less frames per sec? I understand, there are some hardware limits related to 4k. For some people it would be nice to have a higher resolution and maybe less frames per sec.

P.S. This is awesome project! Respect!

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The limitation is the Pi4 CSI lanes aren’t enough to support 4k, they can just barely achieve 1080p @ 50Hz, so 4k which is 4 times as much the resolution ie 4x the data would probably barely work at 10Hz, and I doubt that is a supported refresh rate by any real monitor.

A better option if you don’t need flawlessly crisp text rendering is to use a 4k to 1080p downscaler, but most of these work better at 30Hz or 60Hz, so would work better with the v4 mini or v4 plus that can do 1080p 60Hz.

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