this post was submitted on 18 Jan 2024
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I got my hands on MPEG-V standard documents which lets me inject "SEM" (sensory effect metadata) inside .mp4 files which would let me program real world stuff on cues like lights, chair movements, water sprays, etc. So literally if I had a NAS with a hoard of movies and bought the right equipment, i could make 4DX at home.

There's an effect description named "scent", which would, obviously, spray some aromatizer or something in the room. I checked out the standard list of scents that can be applied. There are scents like rose, lavender, mint, apples, mixed herbs, but i came across an interesting one which is the one i'm asking for.


  Scent of dragons breath
  Describes the scent of dragons breath

Maybe this is a weird reason to ask this... I really want to know out of curiosity if this "dragon breath" would be some specific mix of herbs or incense or any kind of room spray. I sense it would kind of be an artificial scent... but idk... really... Would it really work if i coded a "Home 4DX" version of the Hobbit movies?

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[–] lemmyng@lemmy.ca 75 points 1 year ago (3 children)

Sulphur is what comes to mind.

[–] OhmsLawn@lemmy.world 14 points 1 year ago (1 children)

This is the real answer. Sulfur Dioxide would basically eliminate any other odors. I'm thinking ozone would be a possible addition, along with whatever that metallic smell is, but nothing biological, no rot, etc.

[–] zeppy5d@pawb.social 3 points 1 year ago* (last edited 1 year ago)

Nice. Even considering that "sulphur" is not an entry on the scent list i got. I guess that could work out

[–] CanadaPlus@futurology.today 3 points 1 year ago* (last edited 1 year ago)

That's more like demons, though.

[–] jordanlund@lemmy.world 31 points 1 year ago (2 children)

Typical description is hot rotten meat. It's not like they have dragon sized toothbrushes.

[–] Tolookah@discuss.tchncs.de 27 points 1 year ago

Isn't that what the brush on spartan helmets is for?

Real answer here. It can't be too gross if you want people watching your movie, though.

[–] Tolookah@discuss.tchncs.de 15 points 1 year ago (1 children)

Without any real technical answer, dragons breath should be sharp, warm, and smokey, but not so much that you think there's a fire in the building. Maybe the smell of slightly burnt, very seasoned meat?

[–] Lmaydev@programming.dev 5 points 1 year ago

You could hook it up to a toaster and turn the setting up depending on intensity.

[–] Witchfire@lemmy.world 13 points 1 year ago

Depends on the color dragon

[–] FooBarrington@lemmy.world 10 points 1 year ago

It actually doesn't really matter which smell you use. The important part is that you install a small, persistent flame in front of the diffuser. That turns any aroma into dragon's breath.

[–] ILikeBoobies@lemmy.ca 8 points 1 year ago
[–] Mothra@mander.xyz 8 points 1 year ago

Vinegar, Gasoline and Rotten Meat

[–] unreachable@lemmy.world 8 points 1 year ago (1 children)

What does dragon breath smell like?

first in the morning when you wake up, blow air out your mouth to your palms, and then go ahead and smell it.

that's what dragon breath smells like.

[–] Cinner@lemmy.world 2 points 1 year ago (2 children)

Better yet, lick the back of your palm, blow on it to dry, then smell.

[–] MaggiWuerze@feddit.de 0 points 1 year ago* (last edited 1 year ago)

hardest upvote I ever had to give

[–] TheButtonJustSpins 7 points 1 year ago

Impending death.

[–] SubArcticTundra@lemmy.ml 5 points 1 year ago (1 children)

That list sounds like the General MIDI of smells to me.

[–] zeppy5d@pawb.social 2 points 1 year ago (1 children)

Exactly. The actual name is "ScentCS"

[–] SubArcticTundra@lemmy.ml 2 points 1 year ago (1 children)

Do you happen to still have the link to the standard?

[–] zeppy5d@pawb.social 2 points 1 year ago* (last edited 1 year ago)

I don't know if sending download links to copyrighted stuff is allowed but i can tell you it's in the Miner's Hut forum. But it requires login to see the dl links.

[–] whenigrowup356@lemmy.world 5 points 1 year ago

Dragon's breath is a pretty common name for incense scents, but it seems to vary a bit between different brands. The only common ingredient I saw was that most of them have musk or "white musk"

[–] Deconceptualist@lemm.ee 5 points 1 year ago

Seared kobold flesh and lingering brimstone.

Take a blowtorch to some grisltly game meat and at the same time burn a firecracker (or sparkler or whatever) and you'll get the idea.

[–] Sir_Fridge@lemmy.world 5 points 1 year ago

Was this added for the shrek 4D movie thing? I saw that in an amusement park once. The dragon sneezes in your face.

[–] cypherpunks@lemmy.ml 4 points 1 year ago (2 children)

I just went looking for this document and found it for sale here; meanwhile over here there is a helpful PDF with a watermarked line drawing of the CD-ROM they'll sell it to you on.

Fuck ISO so much.

[–] Omega_Haxors@lemmy.ml 2 points 1 year ago* (last edited 1 year ago)

Website wouldn't even let me view its contents unless I enabled scripts and THEN would roadblock if I didn't accept cookies. No thanks.

[–] zeppy5d@pawb.social 2 points 1 year ago* (last edited 1 year ago)

You found it, yay! Except i have an edition from 2019 instead of 2011. Wow this standard is so old yet no one had the idea to implement such thing for home cinema?

Honestly yea, fuck the paywalls. Though some german user uploaded a full list of standards updated to 2021, including ISO, DIN, IEC, IEEE, ASTM, so many others. They're available for free now. They sometimes include the CD-ROM files, but i don't think the document i got is my case

[–] OhmsLawn@lemmy.world 4 points 1 year ago

Depends on the dragon.

[–] ivanafterall@kbin.social 2 points 1 year ago

If you get this working, please share the results! It's an awesome idea.

[–] Omega_Haxors@lemmy.ml 2 points 1 year ago

I'd heard that when they breathe fire it's essentially like lighting a fart.

I'd wager it smells like burned nose hair

Well that's very interesting. I'm guessing this is a proprietary scent that got added to the standard by whoever from the industry.

If I was designing it, it would definitely be fire-y. It would be a bad smell if I was being realistic, full of lizard bile sort of smells mixed in with partial combustion products, but nobody wants to be immersed in that. So, I guess the question is what sort of fire is dragon's breath?

It's supposed to be pretty hot, so maybe it's a metal sort of fire, but then again you don't really see that in the natural world. Acetylene and friends could do the same, although I'm not sure what that smells like exactly. Maybe I would split the difference between organic and metallic and go with a burning beeswax/hot metal combo, which shouldn't be too gross.