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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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Add RF dropouts #68

Open Break8731 opened 3 months ago

Break8731 commented 3 months ago

There are still many VHS artifacts missing so this could be a start, here are some examples image-13 image-16

nlolnlolnlolnlo commented 3 months ago

this looks like the head switching artifact moving upwards

Break8731 commented 3 months ago

this looks like the head switching artifact moving upwards

Nope, It just appears and disappears it doesn't seem to move up and down, when I come back home I'll also send a video here

valadaptive commented 3 months ago

I've been meaning to implement this for a while, since I've noticed it in a lot of VHS recordings, but I still don't know how it works fully. It doesn't seem like the VCR necessarily repeats the previous line always, but it doesn't look exactly like head switching artifacts either.

Degamisu commented 3 months ago

A VCR dropout occurs when the tape emulsion fails. It can be on one line and can last for a few nanoseconds, Most notably found in deinterlaced footage. It could be implemented under the "VHS" tab. This could be made with the color loss logic.

Break8731 commented 3 months ago

A VCR dropout occurs when the tape emulsion fails. It can be on one line and can last for a few nanoseconds, Most notably found in deinterlaced footage. It could be implemented under the "VHS" tab. This could be made with the color loss logic.

I found an article that explains more in detail the causes of white noise and other type of dropouts and how to prevent them.

https://cool.culturalheritage.org/videopreservation/vid_guide/6/6.html