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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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DVR lines? #57

Open oisintheblue opened 3 months ago

valadaptive commented 3 months ago

What are DVR lines?

oisintheblue commented 3 months ago

i dont have much knowledge about them but here's what they look like: https://www.youtube.com/watch?v=kgyD-Uf-RbA

dvr lines store smth like captions

VexorionReal commented 3 months ago

I've suggested something similar before. #23

Degamisu commented 3 months ago

These are closed captioning lines. As the name suggests, it holds CC data. This is mostly in the original broadcast of the film unless they are specifically encoded onto the VHS tape.

image an example of CC lines

These lines were used back in the 50s and 60s. Most notable is in the Gunsmoke TV show back in the early'60ss. If you view one of these on a CRT, the overscan will crop out the lines.

VHS does have those lines! They go by the name "Line 21". There are decoders for them. Their lines look like this.

image notice the lines at the top of the screen

Hope this helps clarify some things!