Den 11.02.2023 07:30, skrev Andrew Randrianasulu:

I think this detailed description reflect nicely how high-speed non-uvc data capture work

https://github.com/simoninns/DomesdayDuplicator/wiki/Hardware-Guide

for better or worse you can't just connect usual analog output to it.

I have strived to get an overview of the workflow and found it best here in the "VHS-Decode Wiki": https://github.com/oyvindln/vhs-decode/wiki/Diagram-Visuals#basic-workflow-b... "The final standard for tape archival"! Concept of VHS-Decode Bypass all non-essential hardware, and process it all in software directly. Capture today decode tomorrow! Summary Thanks to low-cost CX Cards alongside the DomesDayDuplicator today digitisation and archival of tapes can be done not only properly but affordably with tapes' original FM (Frequency Modulated) signals being captured and preserved for software decoding and digital archival. Unlike baked-in standard S-Video/Composite and line-out audio capture, FM RF capture offers the full original tape signals making a true digital master copy of your analogue media removing the need for expensive time base correctors and even working physical players in the future. A simplified workflow Practically Any VCR --> FM RF Capture --> RF File of Tape's FM Signal -> Software Demouldation & Timebase Correction --> Lossless TBC Files --> Video Files Correct me if I am wrong, but it seems to me that the second part "FM RF Capture" is the "Domesday Duplicator" (hardware/sw) to create the third "RF File of Tape's FM Signal". So the "VHS-Decode" executes"Software Demouldation & Timebase Correction --> Lossless TBC Files --> Video Files I found it useful to continue reading with FAQ https://github.com/oyvindln/vhs-decode/wiki/FAQ Why FM RF capture and software decoding instead of normal video capture? A: Its just better! No It's a little more advanced, yet very simple in practice. Is this the best way to preserve analogue media? A: Yes, as the method of capture preserves the original tape signal just after initial tracking and amplification there is no alteration of content in any way. Capture today, decode forever! The RF capture process provides an exact copy of the original modulated signal content and then using FLAC compression this data (basically a zip file) can be made 40-60% smaller this is smaller than any lossless compressed video format available. VHS-Decode features the world's first software-defined digital TBC for analogue video media and its 100% free and 100% open-source developed What are the costs? A: It costs 60-300USD* depending on the level of setup you wish to invest in and what hardware you already have available, the white PCIe 1x CX Cards are 20-35USD per card and basic tools/cabling and even amplifyers is under 50USD depending on how budget restrictive you need to be or if you preferer to make cables from the ground up etc. The DomesDayDuplicator (DdD) can cost upto 300USD* is each ware as China has 1000's of CX cards and amplifier boards available so if you already have a VCR/Desktop you are just 2 steps away. How complex is using vhs-decode and its tool suite? Setup normally takes under an hour for hardware and software. Continue with Quick Setup Guide https://github.com/oyvindln/vhs-decode/wiki/Quick-Setup-Guide Yet, I am still in doubt if DomesdayDublicator + VHS-Decode is end-user or developer solution?

Somewhat related: https://www.windytan.com/2019/08/capturing-pal-video-with-sdr-and-few.html?m...

(no code).

older fx2 experiments, there by now seems to be whole library of programs for those older devices in digital instrumentation sector

http://www.triplespark.net/elec/periph/USB-FX2/

Some documentation on earlier  sgi board called Sirius, you can see board was 10-bit internally but small font around analog inputs said they are 8bit really!

http://www.sgistuff.net/hardware/video/documents/007-2238-003-siriusvideo.pd...