I came across Lightberry [1] recently that claims they can do 4k @ 60 Hz from an HDMI signal, and is also HDCP compliant. This talks to a Raspberry Pi using US

I came across Lightberry [1] recently that claims they can do 4k @ 60 Hz from an HDMI signal, and is also HDCP compliant. This talks to a Raspberry Pi using USB 2, and on their site [2], it talks about using the UTV007 [3] and STK1160 [4] chips, both of which are only 720x480px @ 30fps. As you really don't need high resolution for the LED lighting, what they must be doing is using an HDMI splitter and then converting to a lower quality signal, and then capturing/sampling that. Normally HDMI doesn't allow this but it's probably not too hard to find splitters that silently do this anyway. In fact, here's a write-up [5] on using the "HD Fury Linker" [6] to basically upgrade the "Lightberry HD" to work with 4k. HD Fury makes some interesting products to manipulate the HDMI handshake an EDID [7] and an HDMI splitter that has HDCP decryption/encryption and "comes with USB upgradable firmware that allow you to unleash furious features" [8]. The last time I looked at this was about 10 years ago and I remember being put off by the compromises and complexity the HDMI signal path issues caused. Looks like that is no longer an issue (provided you are willing to pay for the gear). [1] https://lightberry.eu https://lightberry.eu [2] https://lightberry.eu/getting-started/#grabberAccordion https://lightberry.eu/getting-started/#grabberAccordion [3] https://www.linuxtv.org/wiki/index.php/Easycap#USBTV007_EasyCAP https://www.linuxtv.org/wiki/index.php/Easycap#USBTV007_Easy... [4] https://www.linuxtv.org/wiki/index.php/Stk1160_based_USB_2.0_video_and_audio_capture_devices https://www.linuxtv.org/wiki/index.php/Stk1160_based_USB_2.0... [5] http://www.chewie.co.uk/general/how-to-get-lightberry-hd-to-output-4k-60fps-with-hd-fury-linker/ http://www.chewie.co.uk/general/how-to-get-lightberry-hd-to-... [6] https://hdfury.com/product/linker-4k60-444-600mhz-scaler/ https://hdfury.com/product/linker-4k60-444-600mhz-scaler/ [7] https://hdfury.com/product/dr-hdmi/ https://hdfury.com/product/dr-hdmi/ [8] https://hdfury.com/product/splitter-4k/ https://hdfury.com/product/splitter-4k/