aitotat wrote on Today, 10:34:
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Someone will likely suggest HDMI capture device but I don't trust any cheap device anymore. So build-in capture support would be real nice feature.
DreamBlaster will, of course, be the one who will give an authoratitative answer about what is possible on the USB front. That being said, in the meantime, if I may make what I believe is a reasonable guess , the USB controller on the RP2350 is USB 1.1, unless I am mistaken, so, even handling CGA at 320x200 in 2-bit color would seem like a stretch without real-time compression, let alone any higher color depth and/or higher resolution modes. And that is assuming there are even enough free CPU resources to theoretically allow for this.
As for decent capture devices, a used Datapath VisionRGB E1S (PCIE) is probably the best option for quality VHA and DVI/HDMI capture in full RGB (no subsampling). It used to be possible to get inexpensive ones for around 100 to 150 US$, AFAICR.
On the USB front, the Elgato Camlink 4K (DVI/HDMI capture only), might work well enough, despite it being limited to YUV422 (subsampling) processing internally. In general terms, when capturing RGB input, this can be alleviated practically entirely if the video mode captured is line doubled before being fed into the Camlink 4K's HDMI input. Depending on the output resolution (line doubling/multiplication) options available on the SerdaVision, the YUV422 limitation of the Camlink 4K may not be an issue at all. Again, Dreamblaster would be the one to ask about HDMI output options (maybe they are already published somewhere and I missed that), but I suspect that at least the lower resolutions are always linedoubled on output for HDMI/DVI compatibility reasons. You will find some stills of Camlink 4K captures here [1] and likely elsewhere in the sane thread, as well as E1S capture stills.
[1]
Re: VGA Capture Thread