{"id":41583,"date":"2020-02-12T16:19:30","date_gmt":"2020-02-12T13:19:30","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/vypusk-rav1e-0-3-kodirovshhika-av1-na-yazyke-rust"},"modified":"2020-02-12T16:19:30","modified_gmt":"2020-02-12T13:19:30","slug":"vypusk-rav1e-0-3-kodirovshhika-av1-na-yazyke-rust","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/vypusk-rav1e-0-3-kodirovshhika-av1-na-yazyke-rust","title":{"rendered":"Uscita di rav1e 0.3, codificatore AV1 scritto in Rust","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/xiph\/rav1e\/releases\/tag\/v0.3.0=\">Si \u00e8 svolto<\/a><\/noindex> rilascio <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/xiph\/rav1e\">rav1e 0.3<\/a><\/noindex>, un codificatore video ad alte prestazioni <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48345\">AV1<\/a><\/noindex>, sviluppato dalle comunit\u00e0 Xiph e Mozilla. Il codificatore \u00e8 scritto in Rust e si distingue dal codificatore di riferimento libaom per una notevole velocit\u00e0 di codifica e un'attenzione maggiore alla sicurezza (l'efficacia della compressione \u00e8 ancora in ritardo). Il progetto <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/xiph\/rav1e\/\">distribuito<\/a><\/noindex> con licenza BSD.<\/p>\n<p>Supporta tutte le principali funzionalit\u00e0 di AV1, inclusa la supporto<br \/>\ndei frame codificati internamente ed esternamente (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Intra-frame_coding\">intra-<\/a><\/noindex> e <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Inter_frame\">inter<\/a><\/noindex>-frame), superblocco 64&#215;64, sottocampionamento del colore 4:2:0, 4:2:2 e 4:4:4, codifica della profondit\u00e0 colore a 8, 10 e 12 bit, ottimizzazione RDO (Rate-distortion optimization) delle distorsioni, diversi modi di previsione delle variazioni interframe e rilevamento delle trasformazioni, gestione della velocit\u00e0 del flusso e rilevamento del taglio della scena.<\/p>\n<p>Il formato AV1 supera notevolmente <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.mozilla.org\/blog\/2018\/07\/11\/royalty-free-web-video-codecs\/\">x264 e libvpx-vp9 in termini di compressione, ma a causa della complessit\u00e0 degli algoritmi<\/a><\/noindex> H.264 e VP9 per capacit\u00e0 di compressione, ma a causa della complessit\u00e0 degli algoritmi che li implementano <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48429\">richiede<\/a><\/noindex> richiede notevolmente pi\u00f9 tempo per la codifica (la velocit\u00e0 di codifica di libaom \u00e8 di centinaia di volte pi\u00f9 lenta rispetto a libvpx-vp9 e di migliaia di volte pi\u00f9 lenta rispetto a x264).<br \/>\nIl codificatore rav1e offre 11 livelli di prestazioni, i pi\u00f9 alti dei quali consentono di avvicinarsi alla codifica in tempo reale. Il codificatore \u00e8 disponibile sia come utility da riga di comando che come libreria.<\/p>\n<p>Nella nuova versione:<\/p>\n<ul>\n<li class=\"l\"> \u00c8 stata proposta una modalit\u00e0 di codifica pi\u00f9 veloce <noindex><a rel=\"nofollow\" href=\"https:\/\/beta.arewecompressedyet.com\/?job=v0.2.0-s10&#038;job=v0.3.0-s10\">Speed 10<\/a><\/noindex>;\n<li class=\"l\"> Dimensione delle build binarie ridotta (sulla piattaforma x86_64\/Linux la libreria occupa circa 3 MB);\n<li class=\"l\"> Il tempo di compilazione \u00e8 stato ridotto di circa il 14%;\n<li class=\"l\"> Aggiunto un filtro multithreading per rimuovere artefatti blocco dai video (deblocking);\n<li class=\"l\"> Sono state implementate ottimizzazioni aggiuntive per l'architettura x86_64 utilizzando istruzioni SIMD, ampliando l'uso dell'auto-vettorizzazione;\n<li class=\"l\"> Ridotto di 1\/6 il numero di operazioni di allocazione della memoria;\n<li class=\"l\"> Migliorata la logica di soppressione delle distorsioni intra-frame nell'ottimizzazione RDO (Rate-distortion optimization);\n<li class=\"l\"> Alcune operazioni sono state trasferite da calcoli in virgola mobile a calcoli interi;\n<li class=\"l\"> Migliorata la qualit\u00e0 di codifica del 1-2% al secondo livello di velocit\u00e0;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/xiph\/rav1e\/pull\/2083\">Aggiunto<\/a><\/noindex> nuovo filtro di previsione della direzione del movimento (Intra edge);\n<li class=\"l\"> Aggiunta l'opzione &#171;-S&#187; (&#8212;switch-frame-interval) per determinare l'intervallo di switch tra i frame;\n<li class=\"l\"> Aggiunto supporto per la compilazione per la piattaforma wasm32-wasi (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50406\">WebAssembly System Interface<\/a><\/noindex>).\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52341\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0432\u044b\u043f\u0443\u0441\u043a rav1e 0.3, \u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0444\u043e\u0440\u043c\u0430\u0442\u0430 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u0438\u0434\u0435\u043e AV1, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0433\u043e \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u0430\u043c\u0438 Xiph \u0438 Mozilla. \u041a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Rust \u0438 \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u043e\u0442 \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0433\u043e \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 libaom \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u043c \u0443\u0432\u0435\u043b\u0438\u0447\u0435\u043d\u0438\u0435\u043c \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u0438 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0438 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u043d\u044b\u043c \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435\u043c \u043a \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044e \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u044c \u0441\u0436\u0430\u0442\u0438\u044f \u043f\u043e\u043a\u0430 \u043e\u0442\u0441\u0442\u0430\u0451\u0442). \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 BSD. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0442\u0441\u044f \u0432\u0441\u0435 \u043e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 AV1, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435- \u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-41583","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - 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