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valadaptive / ntsc-rs

Free, open-source analog TV + VHS effect. Standalone application + plugin (After Effects, Premiere, and OpenFX).
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(suggestion) WSS [Wide Screen Signaling] white dotted lines overlay #23

Open VexorionReal opened 5 months ago

VexorionReal commented 5 months ago

I see these on some VHS recordings from the UK or Poland. They look like this: grgreeehhet Will it be possible to implement an option to use them as an overlay?

Degamisu commented 5 months ago

Some of those lines are usually for closed captions. So they are bound to bounce around the top and even the bottom of the screen. WSS is basically digital metadata embedded in invisible part of the analog TV signal describing qualities of the broadcast. I couldn't find much on the lines for that, but the UK suggests it's on PAL.

image

This is an example of the signal in an oscilloscope. (A tool used to visualize data).

image This image shows close captioning signals, (the bottom lines) that the TV interprets and displays the corresponding text.