Is there a version that doesn't require watching a video please? This would be 10x faster and easier as a text blob
use gemini and ask it to summarize a youtube link
Microscopes can see video on a laserdisc
51–60 of 99 posts
Re: Microscopes can see video on a laserdisc
#52Earlier quoted context omitted.
BUT... Pioneer put AC-3 (Dolby Digital) surround on LaserDiscs before DVDs came out. So LaserDiscs were the first video medium to offer digital sound at home. And at that point, most players sold were combo players that could also play CDs. And there was one more disc format: CD Video. It was a CD-sized digital single that also had a LaserDisc section for the (analog) music video. I have a couple; one is Bon Jovi.
Was CD video compressed? I thought it existed at the same time as DVD but cheaper.
That's Video CD. It existed before DVD but survived alongside it (mainly in Asia) as a cheaper alternative.
Re: Microscopes can see video on a laserdisc
#53I'm not that familiar with CED but the fact that we can see the images with microscopes is because these are analog discs? And that was because computing power back then was non-existent so they didn't use any kind of compression?
There wasn't any computing involved. The video was recorded as a sampled analogue signal, with pits of varying length setting the "output voltage".
If you look at a Constant Angular Velocity disc you can actually see "spokes" radiating out from the centre, with two broad ones 180° apart. The narrow spokes are the horizontal sync pulses occuring every 0.576° - the disc rotates at 25 revs per second and each concentric track is one complete frame. The broader spokes are of course the vertical sync pulses and colour burst occurring every 1/50th of a second.
If you're in the US or Japan, these numbers are 30 revs per second, 0.686° and 1/60th of a second, because of the lower resolution video standard, but it doesn't look like Laserdisc was much of a "thing" in those countries.
Here in the UK, in the 1980s all the schools took part in a thing called "The Domesday Project" [1] - the name is a reference to The Domesday Book, a survey of England and Wales carried out in the 11th century by William the Conqueror.
The Domesday Discs were CAV Laserdiscs that were played in a special player with a SCSI interface, attached to a BBC Micro computer. Because each concentric track was a complete frame it was possible to get perfect still frame video by just keeping the head still, so you could look at photos of places all around the UK and read a bit of information about them genlocked over the top.
Re: Microscopes can see video on a laserdisc
#54Interesting to see how optical technology has evolved. In lighting design we also deal a lot with how light interacts with surfaces, lenses and reflectors.
Even small changes in optics can drastically change how light spreads or how uniform illumination appears in a space.
Re: Microscopes can see video on a laserdisc
#55Now I wonder if something similar is possible with the magnetic fields on VHS tape
Re: Microscopes can see video on a laserdisc
#56[deleted]
Re: Microscopes can see video on a laserdisc
#57Is there a version that doesn't require watching a video please? This would be 10x faster and easier as a text blob
https://wiki.techtangents.net/wiki/Seeing_Media
writeup from the author linked in the video description
Re: Microscopes can see video on a laserdisc
#58Is there a version that doesn't require watching a video please? This would be 10x faster and easier as a text blob
[flagged]
It's likely based on just the transcript, even if it describes visual things, it likely guesses those things from the transcript text only.
Maybe it's better now, but that was how it did it recently. To be convinced that it "watches" the video, I would need to see evidence of it referring to facts that are strictly only possible to know from the video, but not guessable from the audio.
Re: Microscopes can see video on a laserdisc
#59Earlier quoted context omitted.
Uncompressed digital encoding might still result in recognizable structures, but probably not as nicely as here.
Only the CD had uncompressed data.
CED, not CD. And LDs most definitely also have uncompressed data, resulting in visible text at 22:30 in the video.