ld-decode

I’m positive you know this already, but for anyone else, this section [0] of the lddecode project has a wonderful example of all the visible and non-visible portions of an analog video signal. The project as a whole is also utterly fascinating, if you find the idea of pulling an analog RF signal from a laser and then doing software ADC interesting. [0]: https://github.com/happycube/ld-decode/wiki/ld-analyse#under...

Check out Domesday Duplicator, LD-decode, and VHS-decode! https://www.youtube.com/watch?v=KueSbYs7yMU https://github.com/simoninns/DomesdayDuplicator https://github.com/happycube/ld-decode https://github.com/oyvindln/vhs-decode https://www.domesday86.com/ https://en.wikipedia.org/wiki/BBC_Domesday_Project

To save folks the search query: ld-decode - https://github.com/happycube/ld-decode Also worth mentioning the fork, vhs-decode - https://github.com/oyvindln/vhs-decode which was discussed here previously. VHS-Decode – Software defined VHS decoder - https://news.ycombinator.com/item?id=33942490 - September, 2022 (81 comments) Edit: Thank you @LocalH for the link typo correction.

https://github.com/oyvindln/vhs-decode Fork of https://github.com/happycube/ld-decode

Not defending intellectual incuriosity here, but in fairness ffmpeg is the antithesis of "easy to learn." I capture Laserdiscs (i.e. sampling the laser's RF output and decoding in software [0]) for fun, and use ffmpeg as part of that chain – I still barely scratch the surface of what it can do. [0]: https://github.com/happycube/ld-decode

> Lots of truth to this. Just start building. Build for yourself and real people, not imagined profiles of people. I've been doing this for years and all it has done is drill me further down into super-niche rabbit holes that the majority of people don't care about. I mention this because I see this kind of advice all the time on here, but it so often comes bundled with the unwritten assumption that the kinds of things the reader will build won't stray too far from the mainstream. After more than a decade of "building", I can state with confidence that profitable ideas don't spring up from countless hours invested in building e.g. a better comb filter for NTSC. The reality of the situation is that if your interests are things like "doing cool stuff with AI" or "SaaSify yet another thing" or "shoehorn Merkle trees into yet another square h

They owe you nothing, so if you want to figure something out, searching the web is your best chance. Also, how is it not clear what the project is? First thing I see from the submission link: > Software defined VHS decoder > A fork of LD-Decode, the decoding software powering the Domesday86 Project Which links to https://github.com/happycube/ld-decode and https://www.domesday86.com/ > Software defined LaserDisc decoder and > Domesday86 is a project that aims to recreate the experience of the original BBC Domesday project using modern hardware and software Which leads me to searching what BBC Domesday is, as I didn't know: > The BBC Domesday Project was a partnership between Acorn Computers, Philips, Logica, and the BBC to mark the 900th anniversary of the original Domesday Book, an 11th-century census of England. It has been cited as an

Also, if you're interested, there is a robust community around re-creating the Domesday project with modern hardware [0], as well as capturing LDs via the player's raw RF output, using both bespoke hardware [1] and off-the-shelf [2], then decoding the output in software [3]. [0]: https://www.domesday86.com [1]: https://github.com/simoninns/DomesdayDuplicator/wiki [2]: https://github.com/happycube/cxadc-linux3 [3]: https://github.com/happycube/ld-decode

There are in fact proof-of-concepts similar to what you describe[1] (this one is based off the Doomsday Duplicator[2], a hardware device used for Direct RF capturing off laserdisc players). My (admittedly basic) understanding of VHS vs S-VHS decks is that due to the stricter tolerances required by the S-VHS standard, S-VHS decks typically have better transports than regular VHS decks (lower wow/flutter, better tracking, etc...). And of course many of the high-end decks have a built in TBC. [1] https://github.com/happycube/ld-decode/issues/16 [2] https://www.domesday86.com/?page_id=978

So he has a $25 RCA-to-HDMI and a $70 HDMI capture card for around $100. A fully assembled Domesday board is also somewhere $100 according to https://forum.lddb.com/viewtopic.php?p=100903&sid=a582ac9ebc..., although I guess it could be higher without a good PCB supplier. The article's Airspy R2 SDR is $169. There's a PAL decoder in https://github.com/happycube/ld-decode/blob/3d5cdeddbaf4515b..., I'm guessing it could be adapted to the article's purposes with some work. https://twitter.com/windyoona/status/1163043586314821635 says she was looking at it.