yuvycsnoise(1)

💖 yuvycsnoise — bestie edition 💖

okay so you found yuvycsnoise(1) in the MJPEG tools manual and you're like "what even is this" — don't worry, I got you. this is the noise filter specialized for NTSC Y/C separation noise, and honestly? she's niche but she works. 🎀

✨ NAME ✨

yuvycsnoise — the noise filter that is specialized for NTSC Y/C separation noise. yes that's the whole vibe. periodt. 💅

✨ SYNOPSIS ✨

yuvycsnoise [-t] [-m t|b|i|c] [-S MIN] [-T ERRT[,MAXT]] [-B ERRB[,MAXB]]
[-I ERRI[,MAXI]] [-C ERRC[,MAXC]]

✨ DESCRIPTION ✨

so here's the tea 🍓 — if your video capture hardware has only a poor Y/C separator, then at vertical stripes (especially red/blue, the drama queens of colour), you get these noises that look like a checker flag and that go bright/dark invert per 1 frame. like flickery little gremlins. 🙈

yuvycsnoise reduces noises of exactly this type. that's her whole job. she ate and left no crumbs. 👑

✨ OPTIONS ✨

yuvycsnoise accepts the following options, bestie, and I'm listing every single one, no skipping:

• -t — test mode ✨ Instead of actually doing noise reduction, the noises get marked as black pixels. it's giving debug-mode main character energy.
• -m METHOD — pick your method, default is tbic. METHOD is a string where each character means a method:
  • t: the triframe method of luma noise reduction.
  • b: the biframe method of luma noise reduction.
  • i: the infield method of luma noise reduction.
  • c: chroma noise reduction — and this one uses 3 frames like triframe does. slay.
• -S MIN — default: 4. sets the minimum threshold of luma/chroma difference that gets treated as noise. lowkey the bouncer at the club door. 🫶
• -T ERRT[,MAXT] — default: 32,255.
• -B ERRB[,MAXB] — default: 32,255.
• -I ERRI[,MAXI] — default: 16,255.
• -C ERRC[,MAXC] — default: 12,255.

and here's what that whole -T/-B/-I/-C family actually means, because it's a lot: they set the threshold of luma/chroma difference for each of the methods. 💀 ERRx is the maximum error of luma/chroma of the pixels around the target pixel — which should be the same if the target contains noise. MAXx is the maximum threshold of luma/chroma difference of the target pixel from the luma/chroma after noise reduction. iykyk. 🧚

✨ AUTHOR ✨

yuvycsnoise was written by Kawamata/Hitoshi. 💖

if you have questions, remarks, problems, or you just want to contact the developers, the main mailing list for the MJPEG-tools is:

mjpeg-users@lists.sourceforge.net

for more info, see our website at:

http://mjpeg.sourceforge.net/

✨ SEE ALSO ✨

• mjpegtools(1) — go read that one too, bestie. 🌸

and that's the whole page!! 🦋✨ this icon was brought to you by the MJPEG Tools Team, dated 5 February 2002 — vintage, retro, still serving looks. no cap. 💜👑