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<div class="moz-cite-prefix">Den 11.02.2023 07:30, skrev Andrew
Randrianasulu:<br>
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cite="mid:CA+rFky6T2P5acGsZciBdJp7DhE0TPfGo0QvGPY3GXDk0x4jAbA@mail.gmail.com">
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<div dir="auto">I think this detailed description reflect nicely
how high-speed non-uvc data capture work
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<div dir="auto"><a
href="https://github.com/simoninns/DomesdayDuplicator/wiki/Hardware-Guide"
rel="noreferrer noreferrer noreferrer noreferrer"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/simoninns/DomesdayDuplicator/wiki/Hardware-Guide</a><br>
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<div dir="auto">for better or worse you can't just connect usual
analog output to it.</div>
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I have strived to get an overview of the workflow and found it best
here in the "VHS-Decode Wiki":<br>
<a class="moz-txt-link-freetext" href="https://github.com/oyvindln/vhs-decode/wiki/Diagram-Visuals#basic-workflow-breakdown">https://github.com/oyvindln/vhs-decode/wiki/Diagram-Visuals#basic-workflow-breakdown</a><br>
"The final standard for tape archival"!<br>
<br>
<blockquote>Concept of VHS-Decode<br>
Bypass all non-essential hardware, and process it all in software
directly.<br>
Capture today decode tomorrow!<br>
<br>
Summary<br>
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.<br>
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.<br>
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</blockquote>
A simplified workflow<br>
<blockquote>Practically Any VCR --> FM RF Capture --> RF File
of Tape's FM Signal -> Software Demouldation & Timebase
Correction --> Lossless TBC Files --> Video Files<br>
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</blockquote>
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".<br>
So the "VHS-Decode" executes"Software Demouldation & Timebase
Correction --> Lossless TBC Files --> Video Files<br>
<br>
I found it useful to continue reading with<br>
<br>
<blockquote>FAQ<br>
<a class="moz-txt-link-freetext" href="https://github.com/oyvindln/vhs-decode/wiki/FAQ">https://github.com/oyvindln/vhs-decode/wiki/FAQ</a><br>
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<blockquote>Why FM RF capture and software decoding instead of
normal video capture?<br>
A: Its just better!<br>
No It's a little more advanced, yet very simple in practice.<br>
<br>
<br>
Is this the best way to preserve analogue media?<br>
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.<br>
Capture today, decode forever!<br>
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.<br>
<br>
VHS-Decode features the world's first software-defined digital TBC
for analogue video media and its 100% free and 100% open-source
developed<br>
</blockquote>
<blockquote>What are the costs?<br>
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.<br>
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.<br>
<br>
How complex is using vhs-decode and its tool suite?<br>
Setup normally takes under an hour for hardware and software.<br>
</blockquote>
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Continue with<br>
<br>
<blockquote>Quick Setup Guide<br>
<a class="moz-txt-link-freetext" href="https://github.com/oyvindln/vhs-decode/wiki/Quick-Setup-Guide">https://github.com/oyvindln/vhs-decode/wiki/Quick-Setup-Guide</a><br>
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Yet, I am still in doubt if DomesdayDublicator + VHS-Decode is
end-user or developer solution? <br>
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<blockquote type="cite"
cite="mid:CA+rFky6T2P5acGsZciBdJp7DhE0TPfGo0QvGPY3GXDk0x4jAbA@mail.gmail.com">
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<div dir="auto">Somewhat related:</div>
<div dir="auto"><a
href="https://www.windytan.com/2019/08/capturing-pal-video-with-sdr-and-few.html?m=1"
rel="noreferrer noreferrer noreferrer" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.windytan.com/2019/08/capturing-pal-video-with-sdr-and-few.html?m=1</a><br>
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<div dir="auto">(no code).</div>
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<div dir="auto">older fx2 experiments, there by now seems to be
whole library of programs for those older devices in digital
instrumentation sector</div>
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<div dir="auto"><a
href="http://www.triplespark.net/elec/periph/USB-FX2/"
rel="noreferrer noreferrer" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">http://www.triplespark.net/elec/periph/USB-FX2/</a><br>
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<div dir="auto">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!</div>
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<div dir="auto"><a
href="http://www.sgistuff.net/hardware/video/documents/007-2238-003-siriusvideo.pdf"
target="_blank" rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">http://www.sgistuff.net/hardware/video/documents/007-2238-003-siriusvideo.pdf</a><br>
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