this post was submitted on 12 Feb 2024
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A long long LOOOONG time ago I tried to screenshot a video in windows media player and the screenshot still changed when I moved or played the video. I often wonder if that was a fever dream or just some weird shit that was happening with really early tech. I remember being so mad because I just wanted a screenshot of a scene in the video and it wouldn't work lol
Not a fever dream, I remember this, too. You basically got a "transparent" image through which you could see the rendered live (or game, as it happened with those, too). As soon as you closed the video player/game, or saved and reloaded the image, the effect was gone and you were stuck with a... I think it was just a black image?
Omg it wasn't a fever dream! 🥹
IIRC media players used to do something like a green screen where they draw a rectangle of a certain color and then a separate process would decode the video and display it over the colored rectangle. So taking a screenshot of the media player would capture the colored rectangle and it'd also be targeted by the video renderer.
This is real. I first was mad too, but than I copied it into paint, made some kind of clipart TV around it, and made it my desktop background. After that I could open VLC, move the window into the right spot and minimize it. This was soo cool.
You've activated my hyperanalytical brain. I have to know exactly how that worked
I don't know the exact technicalities but you can think of it as there is a color that's "VLC video", like a green screen. VLC itself consists of a window filled with this color and projects the video to the coordinates. Once you minimize the window, the video disappears, not because it isn't projected anymore, but because there is no "projection surface", except if the color happens to appear somewhere, be it paint or the background. I hope that makes it clear as far as I myself understand it.
Fascinating. Follow up question, did your computer have a second graphics card for 3D graphics/decoding video?
This is almost 2 decades ago, so I doubt it