{"id":814,"date":"2015-12-11T23:33:41","date_gmt":"2015-12-11T22:33:41","guid":{"rendered":"http:\/\/gyomh.fr\/portfolio\/?p=814"},"modified":"2015-12-11T23:49:33","modified_gmt":"2015-12-11T22:49:33","slug":"la-video-a-360","status":"publish","type":"post","link":"https:\/\/gyomh.fr\/portfolio\/la-video-a-360\/","title":{"rendered":"La vid\u00e9o \u00e0 360\u00b0"},"content":{"rendered":"

Avec tout ces casques VR qui sortent, notamment celui de Samsung<\/a> qui permet, pour la modique somme de 99\u20ac, d’utiliser son smartphone (Samsung) pour s’immerger dans le monde de la r\u00e9alit\u00e9 virtuelle, ou bien les Google card board<\/a> (beaucoup plus \u00e9conomiques, n’\u00e9tant constitu\u00e9es ,comme son nom l’indique, essentiellement que de carton), je me suis essay\u00e9 \u00e0 la post-production de vid\u00e9o \u00e0 360\u00b0.<\/p>\n

Gr\u00e2ce au tr\u00e8s bon plug-in Skybox Studio de Mettle\u00a0pour After Effects, j’ai <\/a>tr\u00e8s vite pu int\u00e9grer des \u00e9l\u00e9ments 3d ainsi que des particules dans un environnement 3d. Le plugin Element 3D de VideoCopilot<\/a> est d’ailleurs tr\u00e8s efficace dans sa gestion des images \u00e9quirectangulaires pour cr\u00e9er un environnement 3D.<\/p>\n

Le principe de la vid\u00e9o \u00e0 360\u00b0 est plut\u00f4t simple. La prise de vue se fait avec 6 cam\u00e9ras dispos\u00e9es en cube (qui filment respectivement devant, derri\u00e8re, \u00e0 gauche, \u00e0 droite, en haut et en bas).<\/p>\n

\"\"<\/p>\n

Pour recr\u00e9er ce dispositif en post-production, on cr\u00e9e un cube sur lequel on pose chaque prise de vue sur une des face. On place une cam\u00e9ra au centre du cube et voil\u00e0 ! On ne voit pas les ar\u00eates du cube car les images raccordent parfaitement les une aux autres.<\/p>\n

Par contre, nous avons toujours 6 vid\u00e9os diff\u00e9rentes (une pour chaque cube). Le mieux serait de pouvoir exporter tout \u00e7a dans un seul fichier. C’est l\u00e0 qu’intervient le format \u00e9quirectangulaire. C’est une image qui compile les 6 images en une seule. (Si vous ne pouvez pas tourner la cam\u00e9ra dans la vid\u00e9o YouTube, vous voyez l’image \u00e9quirectangulaire).<\/p>\n

\"\"<\/p>\n

Ces images servent, entre autre, dans les logiciels 3d pour recr\u00e9er un environnement. Elles servent aussi en post-production pour mieux int\u00e9grer des \u00e9l\u00e9ments de synth\u00e8se (pour avoir les vrais reflets qui correspondent au lieu o\u00f9 ont \u00e9t\u00e9 les sc\u00e8nes).<\/p>\n

C’est cette image que lit YouTube. Pendant la lecture, il d\u00e9code l’image pour pouvoir l’appliquer sur un cube et place une cam\u00e9ra virtuelle au centre que l’on peut piloter.<\/p>\n","protected":false},"excerpt":{"rendered":"

Avec tout ces casques VR qui sortent, notamment celui de Samsung qui permet, pour la modique somme de 99\u20ac, d’utiliser son smartphone (Samsung) pour s’immerger dans le monde de la r\u00e9alit\u00e9 virtuelle, ou bien les Google card board (beaucoup plus \u00e9conomiques, n’\u00e9tant constitu\u00e9es ,comme son nom l’indique, essentiellement que de carton), je me suis essay\u00e9<\/p>\n

Lire la suite<\/a><\/div>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"video","meta":{"footnotes":""},"categories":[100,19,5],"tags":[131,62,132,133],"yoast_head":"\nLa vid\u00e9o \u00e0 360\u00b0 - GYOMH Portfolio<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gyomh.fr\/portfolio\/la-video-a-360\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La vid\u00e9o \u00e0 360\u00b0 - GYOMH Portfolio\" \/>\n<meta property=\"og:description\" content=\"Avec tout ces casques VR qui sortent, notamment celui de Samsung qui permet, pour la modique somme de 99\u20ac, d’utiliser son smartphone (Samsung) pour s’immerger dans le monde de la r\u00e9alit\u00e9 virtuelle, ou bien les Google card board (beaucoup plus \u00e9conomiques, n’\u00e9tant constitu\u00e9es ,comme son nom l’indique, essentiellement que de carton), je me suis essay\u00e9Lire la suite\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gyomh.fr\/portfolio\/la-video-a-360\/\" \/>\n<meta property=\"og:site_name\" content=\"GYOMH Portfolio\" \/>\n<meta property=\"article:published_time\" content=\"2015-12-11T22:33:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2015-12-11T22:49:33+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.polygonpi.com\/wp-content\/uploads\/2013\/04\/envmap.jpg\" \/>\n<meta name=\"author\" content=\"gyomh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@gyomh\" \/>\n<meta name=\"twitter:site\" content=\"@gyomh\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"gyomh\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/gyomh.fr\/portfolio\/la-video-a-360\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/gyomh.fr\/portfolio\/la-video-a-360\/\"},\"author\":{\"name\":\"gyomh\",\"@id\":\"https:\/\/gyomh.fr\/portfolio\/#\/schema\/person\/f11729ca439830302e8efa6d4f252a27\"},\"headline\":\"La vid\u00e9o \u00e0 360\u00b0\",\"datePublished\":\"2015-12-11T22:33:41+00:00\",\"dateModified\":\"2015-12-11T22:49:33+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/gyomh.fr\/portfolio\/la-video-a-360\/\"},\"wordCount\":344,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/gyomh.fr\/portfolio\/#\/schema\/person\/f11729ca439830302e8efa6d4f252a27\"},\"keywords\":[\"360\",\"compositing\",\"Equirectangular\",\"Skybox\"],\"articleSection\":[\"Actu\",\"Digital Compositing\",\"test\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/gyomh.fr\/portfolio\/la-video-a-360\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/gyomh.fr\/portfolio\/la-video-a-360\/\",\"url\":\"https:\/\/gyomh.fr\/portfolio\/la-video-a-360\/\",\"name\":\"La vid\u00e9o \u00e0 360\u00b0 - 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