{"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\/cs\/blog\/news\/vypusk-svt-av1-3-1-0-kodirovshhika-dlya-formata-video-av1","title":{"rendered":"Vyd\u00e1n\u00ed SVT-AV1 3.1.0, kod\u00e9r pro form\u00e1t videa AV1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byla vyd\u00e1na verze knihovny SVT-AV1 3.1.0 (Scalable Video Technology AV1) s implementacemi kod\u00e9ru a dekod\u00e9ru video form\u00e1tu AV1, pro kter\u00e9 jsou vyu\u017e\u00edv\u00e1ny roz\u0161\u00ed\u0159en\u00ed v procesorech x86_64 a ARM pro urychlen\u00ed hardwarov\u00e9ho paraleln\u00edho zpracov\u00e1n\u00ed v\u00fdpo\u010dt\u016f. Projekt byl vytvo\u0159en spole\u010dnost\u00ed Intel ve spolupr\u00e1ci s Netflix s c\u00edlem dos\u00e1hnout \u00farovn\u011b v\u00fdkonu vhodn\u00e9 pro real-time recoding videa a aplikaci v slu\u017eb\u00e1ch, kter\u00e9 poskytuj\u00ed video na vy\u017e\u00e1d\u00e1n\u00ed (VOD). V sou\u010dasn\u00e9 dob\u011b se v\u00fdvoj prov\u00e1d\u00ed pod z\u00e1\u0161titou aliance Open Media (AOMedia), kter\u00e1 dohl\u00ed\u017e\u00ed na rozvoj video form\u00e1tu AV1. D\u0159\u00edve se projekt rozv\u00edjel v r\u00e1mci projektu OpenVisualCloud, kter\u00fd tak\u00e9 vyv\u00edj\u00ed kod\u00e9ry SVT-HEVC a SVT-VP9. K\u00f3d je \u0161\u00ed\u0159en pod licenc\u00ed BSD.     <\/p>\n<p>SVT-AV1 m\u016f\u017ee b\u00fdt sestaven pro syst\u00e9my zalo\u017een\u00e9 na jak\u00fdchkoli architektur\u00e1ch, pro kter\u00e9 je k dispozici p\u0159eklada\u010d s podporou standardu C99, av\u0161ak nejlep\u0161\u00ed v\u00fdkon je dosa\u017een na syst\u00e9mech x86_64, kde jsou vyu\u017e\u00edv\u00e1ny assemblerov\u00e9 optimalizace zalo\u017een\u00e9 na instrukc\u00edch SIMD (ide\u00e1ln\u011b s podporou AVX2 v CPU, minim\u00e1ln\u011b sta\u010d\u00ed SSE2). Spot\u0159eba pam\u011bti z\u00e1vis\u00ed na po\u010dtu procesorov\u00fdch jader zapojen\u00fdch do k\u00f3dov\u00e1n\u00ed, co\u017e je \u0159\u00edzeno volbou &#171;&#8212;lp&#187;. Vzhledem ke slo\u017eitosti aplikovan\u00fdch algoritm\u016f v AV1 vy\u017eaduje k\u00f3dov\u00e1n\u00ed tohoto form\u00e1tu podstatn\u011b v\u00edce zdroj\u016f ne\u017e jin\u00e9 form\u00e1ty; nap\u0159\u00edklad standardn\u00ed k\u00f3dova\u010d projektu AV1 vy\u017eaduje v porovn\u00e1n\u00ed s k\u00f3dova\u010di x264 (profil &#171;main&#187;), x264 (profil &#171;high&#187;) a libvpx-vp9 o 5721, 5869 a 658 v\u00edce v\u00fdpo\u010detn\u00edch operac\u00ed.     <\/p>\n<p>Mezi zm\u011bnami v nov\u00e9 verzi SVT-AV1:  <\/p>\n<ul>\n<li class=\"l\"> Byla provedena optimalizace kompromis\u016f mezi kvalitou a rychlost\u00ed pro presety se st\u0159edn\u00ed a vysokou \u00farovn\u00ed kvality. V re\u017eimu &#171;fast-decode 0&#187; pro presety M1-M5 se rychlost zv\u00fd\u0161ila o 15-25 % p\u0159i zachov\u00e1n\u00ed \u00farovn\u011b kvality. V re\u017eimech fast-decode 1 a 2 pro presety M3-M7 se rychlost zv\u00fd\u0161ila o 15-20 % p\u0159i zachov\u00e1n\u00ed \u00farovn\u011b kvality. Pro presety M0 a MR se \u00farove\u0148 kvality zv\u00fd\u0161ila p\u0159ibli\u017en\u011b o 1-1,5 % p\u0159i hodnocen\u00ed pomoc\u00ed metody BD-Rate (Bjontegaard-Delta).\n<li class=\"l\"> Byla v\u00fdrazn\u011b vylep\u0161ena pr\u00e1ce k\u00f3dovac\u00edho re\u017eimu s n\u00edzkou latenc\u00ed (Low Delay).\n<li class=\"l\"> V\u00fdkon v re\u017eimu RTC se zv\u00fd\u0161il o 5-10%.\n<li class=\"l\"> Na syst\u00e9mech ARM byly pou\u017eity optimalizace zalo\u017een\u00e9 na roz\u0161\u00ed\u0159en\u00edch Neon a SVE2, kter\u00e9 umo\u017enily zv\u00fd\u0161it v\u00fdkon k\u00f3dov\u00e1n\u00ed stream\u016f v n\u00edzk\u00e9m rozli\u0161en\u00ed s vysokou hloubkou barev o 5%.\n<li class=\"l\"> Na syst\u00e9mech ARM byla zv\u00fd\u0161ena v\u00fdkonnost k\u00f3dov\u00e1n\u00ed videa v krajinn\u00e9m (1080p +4 %, 720p +6 %, 480p: +6 %, 360p: +3 %, 240p: +4 %) a portr\u00e9tn\u00edm (1080p +8 %, 720p +4 %, 480p +3 %, 360p +7 %, 240p +4 %) re\u017eimu.\n<li class=\"l\"> V re\u017eimu n\u00e1hodn\u00e9ho p\u0159\u00edstupu byla zavedena podpora S-snippet\u016f.\n<li class=\"l\"> Z fork SVT-AV1-SPY byla p\u0159evedena implementace p\u0159\u00edznak\u016f &#171;&#8212;chroma-qm-min&#187; a &#171;&#8212;chroma-qm-max&#187;, stejn\u011b jako byla p\u0159evedena vylep\u0161en\u00ed souvisej\u00edc\u00ed s Variance Boost (implementace algoritmu adaptivn\u00edho kvantov\u00e1n\u00ed VAQ).\n<li class=\"l\"> V re\u017eimu RTC byly zahrnuty presety M11 a M12.    <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63637\">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 3.1.0 (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 5.0.3 - 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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