Question de debutant sur Nuke

par **vincepapaix** Mer 18 Juin 2008 - 15:19

Hello les gens Smile

Je me met a nuke, et j'ai un prob de gros noob, au niveau des masques bezier... N'ayant pas trop la logique nodale encore, car je suis un after effects users... je galere un peu...

Le lien vers une capture d'ecran :

http://www.vincentpapaix.com/forum/prob_mask_nuke.jpg

Ça doit etre un truc tout con... mais la je trouve pas et ds le pdf de nuke la fleche du "mask" va dans l'autre sens... ce qui me parait plus logique... mais je ne sais pas comment sortir cette fleche depuis le node primatte...

Thx for your help

Very Happy

par KamS Mer 18 Juin 2008 - 19:05

enfaite si tu veux faire juste garder le perso sans cette ??poubelle?? met dans ton "bezier" comme masque dans le "over", pour ton "transform1" fait un copy as clone et paste le pour le bezier avent de rentrer dans le "mask over"

je ferait comme ca moi... apres je suis sur qu'il y a des technique plus simples...

par **vincepapaix** Mer 18 Juin 2008 - 19:45

Hello Kams,

si j'ai bien compris ce que tu me dis de faire c'est de mettre le masque sur le "over"? Si c'est ça, c'est pas la bonne methode car je fais un matchmove du perso sur la video et le masque ne va pas suivre le perso...

Je cherche tout simplement a faire un garbage matte sur le node primatte... et plus generalement a comprendre comment fonctionne les masques de nuke Smile

par KamS Mer 18 Juin 2008 - 21:31

ok, j'ai compris ce que tu veux :

sous ta video crée un copy (k), tu rentre ta video en 2 et ton bezier en 1.

Dans bezier tu met output alpha, dans ton copie tu met dans copy chennel : rgba to rgba

dans le primatte tu met foreground rgba et option masque tu met rgba.alpha

et normalement ca devrait marcher si j'ai bien compris ce que tu veux

par **Swoop** Ven 20 Juin 2008 - 8:46

Un nukeman pour vincepapaix dans les parages ?? Pim ? Ramirez ? Brico ? Aurelien ?

par Morgan Ven 20 Juin 2008 - 13:54

Hello Vince,

Je t'ai fait un exemple a l'arrache pour t'illustrer les 2 méthodes de garbage

Globalement l'idée du Flow1 est toute bête, tu fais ton key et après tu appliques un bezier (avec un parametre de couleur noir pour que l'alpha=0) qui affecte juste le channel alpha. Tu fais un premult en suivant pour "applatir" l'alpha de ton garbage (en rgba.alpha) avec l'alpha du key.

Le second Flow c'est la même idée sauf que là tu vas utiliser ton bezier pour créer un nouveau channel (dans mon exemple c'est garbage_mask1) qui contient lui meme un channel alpha. Tu met le bezier juste avant ton primatte et tu dis a primatte de s'en servir comme mask.

That's all Smile

Si c'est un peu vague dis moi ou tu galere j'essaierais de détailler

Cheers,

Morgan

Créé un fichier dans TextEdit et colles le bouzin dedans, tu le save en machin.nk et tu lances nuke puis tu fais file=>import script et ca va t'importer le tout.

Petite précision : désactive le formattage dans ton editeur de texte (Préférence : coches format texte) pour pouvoir enregistrer des .txt et non des .doc/.rtf qui créeraient des erreur a l'import dans nuke a cause des tags de formattage texte. Tu renommes ensuite ton .txt en .nk

set cut_paste_input [stack 0]
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bdwidth 323
bdheight 357
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bdwidth 386
bdheight 273
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BackdropNode {
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par Morgan Ven 20 Juin 2008 - 13:55

la suite :

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set N1dd825f0 [stack 0]
ColorBars {
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push $N1dd825f0
push $N1dd1f0b0
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par Morgan Ven 20 Juin 2008 - 13:56

et la fin ! (désolé swoop ne me frappes pas Very Happy

)

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push $N1d972640
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Viewer {
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par hugoleveille Ven 20 Juin 2008 - 14:12

un video vos mille mots

www.hugoleveille.com/nuke.mov

par **Herronelou** Ven 20 Juin 2008 - 14:17

Pour le coup les milles mots ils y sont largement ^^

par Morgan Ven 20 Juin 2008 - 14:19

haha j'avoue Smile

par **vincepapaix** Ven 20 Juin 2008 - 21:10

Hey, je rentre juste d'amsterdam...

Un grand merci a vous!

Je teste ça dessuite

Encore Merci Smile

par **vincepapaix** Ven 20 Juin 2008 - 22:03

Ok ben oui c'etait tout simple, juste que bon falalit faire du noir et pas du blanc....

Thanks a lot

++

par KamS Ven 20 Juin 2008 - 22:30

-> les deux technique fonctionne.... celle du copy (ou sufflecopy) bon tu a un node en plus... lol

par Ramirez Ven 27 Juin 2008 - 2:40

Désolé je rentre juste de Madagascar....Morgan tu est dans le vrai..
la méthode la plus simple est de metre le bezier après Primatte et de changer les couleurs en 0; 0 ; 0; 0........
sur RGBA si tu veux affecter l'ensembles des couches ou sur Alpha uniquement si tu ne veux affecter que l'apha ( il faudra néanmoins appliquer un premulte par la suite si tu décide de passer par cette option)

En fait un bezier de valeur 0;0;0;0 dans tout les cannaux se comporte comme une sorte de black hole, libre à toi de l'appliquer sur le canal désiré.....(dans le premier onglet du bezier)

par Contenu sponsorisé

Question de debutant sur Nuke

Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Re: Question de debutant sur Nuke

Lun	Mar	Mer	Jeu	Ven	Sam	Dim
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31