{"id":139748,"date":"2025-07-27T23:11:57","date_gmt":"2025-07-27T21:11:57","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-svt-av1-3-1-0-kodirovshhika-dlya-formata-video-av1"},"modified":"2025-07-27T23:11:57","modified_gmt":"2025-07-27T21:11:57","slug":"vypusk-svt-av1-3-1-0-kodirovshhika-dlya-formata-video-av1","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/vypusk-svt-av1-3-1-0-kodirovshhika-dlya-formata-video-av1","title":{"rendered":"Lansarea SVT-AV1 3.1.0, encoder pentru formatul video AV1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A fost publicat\u0103 versiunea 3.1.0 a bibliotecii SVT-AV1 (Scalable Video Technology AV1), care include implement\u0103ri ale encoder-ului \u0219i decoder-ului pentru formatul de codare video AV1, pentru care sunt utilizate extensiile de hardware din procesoarele x86_64 \u0219i ARM pentru a accelera paralelizarea calculelor. Proiectul a fost creat de Intel \u00een parteneriat cu Netflix cu scopul de a atinge un nivel de performan\u021b\u0103 potrivit pentru re-encodarea video \u00een timp real \u0219i utilizarea \u00een servicii de livrare video la cerere (VOD). \u00cen prezent, dezvoltarea se realizeaz\u0103 sub egida alian\u021bei Open Media (AOMedia), care supravegheaz\u0103 evolu\u021bia formatului de codare video AV1. Anterior, proiectul a evoluat \u00een cadrul proiectului OpenVisualCloud, care dezvolt\u0103 de asemenea encoderele SVT-HEVC \u0219i SVT-VP9. Codul este distribuit sub licen\u021ba BSD.     <\/p>\n<p>SVT-AV1 poate fi compilat pentru sisteme bazate pe orice arhitectur\u0103 care dispune de un compilator cu suport pentru standardul C99, dar cea mai bun\u0103 performan\u021b\u0103 se ob\u021bine pe sistemele x86_64, pentru care se utilizeaz\u0103 optimiz\u0103ri \u00een assemble bazate pe instruc\u021biuni SIMD (ideal, CPU ar trebui s\u0103 suporte AVX2, dar minimul acceptabil este SSE2). Consumarea memoriei depinde de num\u0103rul de nuclee de procesor utilizate pentru codificare, regleaz\u0103 op\u021biunea &#171;&#8212;lp&#187;. Din cauza complexit\u0103\u021bii algoritmilor utiliza\u021bi \u00een AV1, codificarea acestui format necesit\u0103 resurse semnificativ mai mari dec\u00e2t alte formate, de exemplu, codificatorul standard din proiectul AV1 necesit\u0103 cu 5721, 5869 \u0219i 658 de ori mai multe calculuri \u00een compara\u021bie cu codificatoarele x264 (profilul &#171;main&#187;), x264 (profilul &#171;high&#187;) \u0219i libvpx-vp9.     <\/p>\n<p>Printre modific\u0103rile din noua versiune SVT-AV1:  <\/p>\n<ul>\n<li class=\"l\"> Au fost efectuate optimiz\u0103ri ale compromisurilor \u00eentre calitate\/rapiditate pentru preset\u0103rile care ofer\u0103 un nivel mediu \u0219i ridicat de calitate. \u00cen modul &#171;fast-decode 0&#187; pentru preset\u0103rile M1-M5, viteza a crescut cu 15-25% men\u021bin\u00e2nd nivelul de calitate. \u00cen modurile fast-decode 1 \u0219i 2 pentru preset\u0103rile M3-M7, viteza a crescut cu 15-20% men\u021bin\u00e2nd nivelul de calitate. Pentru preset\u0103rile M0 \u0219i MR, nivelul de calitate a fost \u00eembun\u0103t\u0103\u021bit cu aproximativ 1-1.5% conform evalu\u0103rilor realizate cu metoda BD-Rate (Bjontegaard-Delta).\n<li class=\"l\"> Performan\u021ba modului de codare cu \u00eent\u00e2rziere redus\u0103 (Low Delay) a fost semnificativ \u00eembun\u0103t\u0103\u021bit\u0103.\n<li class=\"l\"> Performan\u021ba \u00een modul RTC a fost \u00eembun\u0103t\u0103\u021bit\u0103 cu 5-10%.\n<li class=\"l\"> Pe sistemele ARM au fost aplicate optimiz\u0103ri bazate pe extensiile Neon \u0219i SVE2, care au permis o cre\u0219tere a performan\u021bei de codare a fluxurilor \u00een rezolu\u021bii sc\u0103zute cu o ad\u00e2ncime mare de culoare de 5%.\n<li class=\"l\"> Pe sistemele ARM, performan\u021ba cod\u0103rii video a fost \u00eembun\u0103t\u0103\u021bit\u0103 \u00een moduri orizontale (1080p +4%, 720p +6%, 480p: +6%, 360p: +3%, 240p: +4%) \u0219i verticale (1080p +8%, 720p +4%, 480p +3%, 360p +7%, 240p +4%).\n<li class=\"l\"> \u00cen modul de acces aleatoriu, este implementat suportul pentru cadrele S.\n<li class=\"l\"> Din fork-ul SVT-AV1-SPY a fost transferat\u0103 implementarea flag-urilor &#171;&#8212;chroma-qm-min&#187; \u0219i &#171;&#8212;chroma-qm-max&#187;, precum \u0219i au fost integrate \u00eembun\u0103t\u0103\u021biri legate de Variance Boost (implementarea algoritmului de cuantificare adaptiv\u0103 VAQ).\n<li class=\"l\"> \u00cen modul RTC, au fost incluse preset\u0103rile M11 \u0219i M12.    <\/ul>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63637\">opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 SVT-AV1 3.1.0 (Scalable Video Technology AV1) c \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f\u043c\u0438 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0438 \u0434\u0435\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, \u0434\u043b\u044f \u0443\u0441\u043a\u043e\u0440\u0435\u043d\u0438\u044f \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u044b \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430\u0445 x86_64 \u0438 ARM \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0440\u0430\u0441\u043f\u0430\u0440\u0430\u043b\u043b\u0435\u043b\u0438\u0432\u0430\u043d\u0438\u044f \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439. \u041f\u0440\u043e\u0435\u043a\u0442 \u0441\u043e\u0437\u0434\u0430\u043d \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Intel \u0432 \u043f\u0430\u0440\u0442\u043d\u0451\u0440\u0441\u0442\u0432\u0435 \u0441 Netflix \u0441 \u0446\u0435\u043b\u044c\u044e \u0434\u043e\u0441\u0442\u0438\u0436\u0435\u043d\u0438\u044f \u0443\u0440\u043e\u0432\u043d\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438, \u043f\u0440\u0438\u0433\u043e\u0434\u043d\u043e\u0433\u043e \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u0438\u0434\u0435\u043e \u043d\u0430 \u043b\u0435\u0442\u0443 \u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 [&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":[702],"tags":[],"class_list":["post-139748","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 SVT-AV1 3.1.0 (Scalable Video Technology AV1) c \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f\u043c\u0438 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0438 \u0434\u0435\u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0444\u043e\u0440\u043c\u0430\u0442\u0430 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