harrypm
commented
1 year ago @Randrianasulu I should probably guide you to the community discord at this point as that's where all the projects devs and testers for capture/decoding and a lot of people from various A/V fields are in there.
But I will also note here the ADV8472 is pretty much the end of the analogue all-in-one processing IC's if you give it enough ram for its TBC/Framestore its used in almost everything off the shelf from Blackmagic's poorly regarded SDI units to Magewells top end PCIe desktop AIO and USB 3.0 AIO based units use the same chip and Xilinx Spartan 7 FPGAs.
Ware as Quadregia uses ADC's then FFPGAs for real-time but this is only for the Betacam formats as far as I know they just use the ADV stuff for VHS etc.
Randrianasulu
simoninns
Hello, and thanks for gian amount of work put in such nuche project.
We at cinelerra-gg mail list were looking at vhs (but also hdmi) capture, and it seems most capture cards/boxes only do at best 8bit yuv 4:2:2 . Not bad if you get this as-is ... but apparently some Analog Devices chips can do better?
May be I completely misread https://web.archive.org/web/20221006213255/https://www.analog.com/media/en/technical-documentation/data-sheets/adv7181d.pdf but it seems to support not just 10-bit per component yuv, but up to 20 bits per component?! (non-standart).
I wonder if fpga-usb3 parts of your project can be reused for interfacing with this IC? Yes, it just black box IC , quite contrary to project's main goals of being max open. But I found whole v4l2 subsystem (not used here, from what I see) lack support for formats like v210 , so may be existence of linux device actually capable of outputting such signal will stimulate some development there, too?
I found it interesting how 10-bit (per component) digital video was all the rage in year 1994 or so (on big SGI machines).
As asude there was "rgb conditioner" fpga project around, at much slower speed, but still trying to deal with unstable input signal, they also manage to use fmpa itself instead of ADC!
https://github.com/svofski/videoconditioner
DC-HDMI also looked interesting (Dreamcast output to hdmi devices), but as far as I understand it reads already digital signals, not converting analog from usual outputs.