{"id":122071,"date":"2025-02-23T14:22:11","date_gmt":"2025-02-23T12:22:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-svt-av1-3-0-kodirovshhika-dlya-formata-video-av1"},"modified":"2025-02-23T14:22:11","modified_gmt":"2025-02-23T12:22:11","slug":"vypusk-svt-av1-3-0-kodirovshhika-dlya-formata-video-av1","status":"publish","type":"post","link":"https:\/\/prohoster.info\/nl\/blog\/news\/vypusk-svt-av1-3-0-kodirovshhika-dlya-formata-video-av1","title":{"rendered":"Uitgave SVT-AV1 3.0, de encoder voor het videoformaat AV1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>De release van de SVT-AV1 3.0 bibliotheek (Scalable Video Technology AV1) is aangekondigd, inclusief implementaties van de encoder en decoder voor het AV1 videocodecformaat, waarbij gebruik wordt gemaakt van de hardwarematige parallelle rekencapaciteiten die aanwezig zijn in moderne Intel CPU's. Het project is opgericht door Intel in samenwerking met Netflix, met als doel een prestatieniveau te bereiken dat geschikt is voor real-time transcodering van video en kan worden toegepast in diensten die video on-demand (VOD) aanbieden. Momenteel wordt de ontwikkeling geleid door de Open Media (AOMedia) alliantie, die de ontwikkeling van het AV1 videocodecformaat co\u00f6rdineert. Eerder werd het project ontwikkeld binnen het OpenVisualCloud project, dat ook SVT-HEVC en SVT-VP9 encoders ontwikkelt. De code is beschikbaar onder de BSD-licentie.     <\/p>\n<p>SVT-AV1 kan worden opgebouwd voor systemen op basis van elke architectuur waarvoor er een compiler is die de C99-standaard ondersteunt, maar de beste prestaties worden behaald op x86_64-systemen, waar assembleroptimalisaties op basis van SIMD-instructies worden toegepast (voorkeur is ondersteuning van AVX2 in de CPU, maar als minimum is SS2 voldoende). Het geheugengebruik is afhankelijk van het aantal processorcores dat wordt gebruikt bij het coderen, wat kan worden geregeld met de optie &#171;&#8212;lp&#187;. Door de complexiteit van de algoritmen in AV1 vereist de codering in dit formaat aanzienlijk meer middelen dan andere formaten; bijvoorbeeld, de standaardencodert van het AV1-project vereist 5721, 5869 en 658 keer meer berekeningen in vergelijking met de encoders x264 (profiel &#171;main&#187;), x264 (profiel &#171;high&#187;) en libvpx-vp9.     <\/p>\n<p>Onder de wijzigingen in de nieuwe release van SVT-AV1:  <\/p>\n<ul>\n<li class=\"l\"> Er zijn optimalisaties uitgevoerd van de afweging tussen kwaliteit\/snelheid voor presets die een gemiddeld en hoog kwaliteitsniveau instellen. In de modus &#171;fast-decode 2&#187; voor de presets M3-M10 is de snelheid met 15-25% toegenomen bij behoud van het kwaliteitsniveau. Voor de presets M0-M2 is het kwaliteitsniveau met ongeveer 1% verhoogd volgens de BD-Rate-methode (Bjontegaard-Delta).\n<li class=\"l\"> In de modus &#171;fast-decode 1&#187; in vergelijking met &#171;fast-decode 0&#187; is het aantal decoderingcycli met ongeveer 10% verminderd met slechts 1% toename in verliezen volgens de BD-Rate-metriek.\n<li class=\"l\"> Op ARM-systemen zijn er optimalisaties toegepast met behulp van Neon- en SVE2-extensies, waardoor de prestaties voor het coderen van streams met een hoge kleurdiepte en resoluties tussen 480p en 1080p met 10-25% zijn verbeterd.\n<li class=\"l\"> Van de fork SVT-AV1-SPY zijn er wijzigingen overgenomen die de perceptie van kwaliteit verbeteren bij het gebruik van de modus &#171;tune 0&#187;.\n<li class=\"l\"> Er is een modus &#171;avif&#187; toegevoegd, die minder middelen verbruikt bij het coderen van statische afbeeldingen.\n<li class=\"l\"> De unit tests zijn verbeterd voor de code die gebruikmaakt van Arm Neon en SVE2-instructies.    <\/ul>\n<p>Bron: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62781\">opennet.ru<\/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 3.0 (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 \u0441\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 CPU Intel \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \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 \u0441\u0435\u0440\u0432\u0438\u0441\u0430\u0445, \u043e\u0442\u0434\u0430\u044e\u0449\u0438\u0445 [&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-122071","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d 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