{"id":184097,"date":"2026-11-02T23:40:40","date_gmt":"2026-11-02T21:40:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/vypusk-svt-av1-4-3-0-kodirovshhika-dlya-formata-video-av1"},"modified":"2026-11-02T23:40:47","modified_gmt":"2026-11-02T21:40:47","slug":"svt-av1-4-3-0-av1-video-encoder-released","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/svt-av1-4-3-0-av1-video-encoder-released","title":{"rendered":"Vyd\u00e1n\u00ed SVT-AV1 4.3.0, kod\u00e9ru pro video form\u00e1t AV1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byla vyd\u00e1na verze knihovny SVT-AV1 4.3.0 (Scalable Video Technology AV1) s implementacemi encoderu a decoderu form\u00e1tu videok\u00f3dov\u00e1n\u00ed AV1, kter\u00e9 k urychlen\u00ed vyu\u017e\u00edvaj\u00ed roz\u0161\u00ed\u0159en\u00ed pro hardwarovou paralelizaci v\u00fdpo\u010dt\u016f p\u0159\u00edtomn\u00e1 v procesorech x86_64 a ARM. Projekt byl vytvo\u0159en spole\u010dnost\u00ed Intel ve spolupr\u00e1ci s Netflixem s c\u00edlem dos\u00e1hnout v\u00fdkonnostn\u00ed \u00farovn\u011b vhodn\u00e9 pro real-time p\u0159ek\u00f3dov\u00e1n\u00ed videa a pou\u017eit\u00ed v slu\u017eb\u00e1ch nab\u00edzej\u00edc\u00edch video na vy\u017e\u00e1d\u00e1n\u00ed (VOD). V sou\u010dasn\u00e9 dob\u011b se v\u00fdvoj uskute\u010d\u0148uje pod hlavi\u010dkou aliance Open Media (AOMedia), kter\u00e1 dohl\u00ed\u017e\u00ed na v\u00fdvoj form\u00e1tu videok\u00f3dov\u00e1n\u00ed AV1. P\u0159edt\u00edm se projekt vyv\u00edjel v r\u00e1mci projektu OpenVisualCloud, kter\u00fd tak\u00e9 vyv\u00edj\u00ed encodery SVT-HEVC a SVT-VP9. K\u00f3d je distribuov\u00e1n pod licenc\u00ed BSD. <\/p>\n<p>SVT-AV1 m\u016f\u017ee b\u00fdt sestaven pro syst\u00e9my zalo\u017een\u00e9 na jak\u00fdchkoliv architektur\u00e1ch, pro kter\u00e9 je k dispozici kompil\u00e1tor podporuj\u00edc\u00ed standard C99, ale nejlep\u0161\u00ed v\u00fdkon je dosa\u017een na syst\u00e9mech x86_64, pro kter\u00e9 jsou pou\u017eity optimalizace assembleru na z\u00e1klad\u011b instrukc\u00ed SIMD (je vhodn\u00e9 m\u00edt v CPU podporu AVX2, ale minim\u00e1ln\u011b sta\u010d\u00ed i SSE2). Spot\u0159eba pam\u011bti z\u00e1vis\u00ed na po\u010dtu procesorov\u00fdch jader pou\u017eit\u00fdch p\u0159i k\u00f3dov\u00e1n\u00ed, regulovan\u00fdch volbou &#171;&#8212;lp&#187;. Kv\u016fli slo\u017eitosti algoritm\u016f pou\u017eit\u00e9ho ve AV1 vy\u017eaduje k\u00f3dov\u00e1n\u00ed tohoto form\u00e1tu podstatn\u011b v\u00edce zdroj\u016f ne\u017e jin\u00e9 form\u00e1ty. <\/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 v\u0161echny p\u0159edvolby, co\u017e umo\u017enilo sn\u00ed\u017eit z\u00e1t\u011b\u017e na CPU o 5-8% p\u0159i zachov\u00e1n\u00ed stejn\u00e9 \u00farovn\u011b kvality a tak\u00e9 zkr\u00e1tit \u010das k\u00f3dov\u00e1n\u00ed o 10-11% v multithreadov\u00e9m re\u017eimu. Bylo urychleno prov\u00e1d\u011bn\u00ed operac\u00ed vylu\u010dov\u00e1n\u00ed neefektivn\u00edch re\u017eim\u016f k\u00f3dov\u00e1n\u00ed (MD &#8212; Mode Decision), v\u00fdpo\u010dt\u016f pohybov\u00fdch vektor\u016f (MV &#8212; Motion Vector) a parametr\u016f filtr\u016f b\u011bhem k\u00f3dov\u00e1n\u00ed, v\u00fdpo\u010dtu velikosti frekven\u010dn\u00edch koeficient\u016f, hled\u00e1n\u00ed subpixelov\u00fdch posun\u016f, kop\u00edrov\u00e1n\u00ed blok\u016f a odfiltrov\u00e1n\u00ed nadbyte\u010dn\u00e9 detailnosti pomoc\u00ed algoritmu RDOQ (Rate-Distortion Optimized Quantization). V multithreadov\u00e9m re\u017eimu je nyn\u00ed pro \u00fasporu zdroj\u016f algoritmus ur\u010duj\u00edc\u00ed translaci obsahu obrazovky aplikov\u00e1n pouze na I-sn\u00edmky.\n<li class=\"l\"> Byl p\u0159id\u00e1n experiment\u00e1ln\u00ed p\u0159\u00edznak &#171;&#8212;fast-decode 3&#187; pro urychlen\u00ed dek\u00f3dov\u00e1n\u00ed statick\u00fdch obr\u00e1zk\u016f.\n<li class=\"l\"> Byl p\u0159id\u00e1n p\u0159\u00edznak &#171;&#8212;fgs-table&#187;, kter\u00fd umo\u017e\u0148uje podporu tabulek zrnitosti (film grain), a API FILM_GRAIN_EVENT pro nastaven\u00ed parametr\u016f zrnitosti v\u00e1zan\u00fdch na sn\u00edmky.\n<li class=\"l\"> Zv\u00fd\u0161ena rychlost bezztr\u00e1tov\u00e9ho k\u00f3dov\u00e1n\u00ed.\n<li class=\"l\"> V re\u017eimu k\u00f3dov\u00e1n\u00ed s n\u00edzkou latenc\u00ed byla implementov\u00e1na paralelizace zpracov\u00e1n\u00ed blok\u016f (tile).\n<li class=\"l\"> Byla p\u0159id\u00e1na volba &#171;max_allowed_consecutive_frames_skips&#187; pro nastaven\u00ed p\u0159esko\u010den\u00ed sn\u00edmk\u016f v re\u017eimu udr\u017eov\u00e1n\u00ed konstantn\u00edho bitratu (CBR).\n<li class=\"l\"> Byl p\u0159id\u00e1n parametr &#171;max_hierarchical_levels&#187; pro spr\u00e1vu z\u00e1sobn\u00edku buffer\u016f pou\u017e\u00edv\u00e1n\u00fdch p\u0159i zm\u011bn\u011b velikosti skupin mezi sn\u00edmkov\u00fdch (mini-GOP &#8212; Group of Pictures).\n<li class=\"l\"> Byla p\u0159id\u00e1na sestavovac\u00ed volba &#171;&#8212;mobile-build&#187; (v CMake &#8212; MOBILE_BUILD) pro vytvo\u0159en\u00ed 8bitov\u00e9 knihovny pro RTC, VOD a AVIF. P\u0159id\u00e1ny volby CONFIG_ENABLE_* pro deaktivaci sestaven\u00ed nepou\u017e\u00edvan\u00fdch n\u00e1stroj\u016f k\u00f3dov\u00e1n\u00ed.\n<li class=\"l\"> Pro syst\u00e9my x86 byly implementov\u00e1ny 8bitov\u00e9 zpracovatele CDEF na b\u00e1zi instrukc\u00ed AVX2 a SSE4.1, stejn\u011b jako 16bitov\u00e9 p\u0159\u00edm\u00e9 transformace na b\u00e1zi instrukc\u00ed AVX2 a AVX-512. Byl p\u0159id\u00e1n optimalizovan\u00fd k\u00f3d pro mezisn\u00edmkov\u00e9 predikce, pr\u00e1ci s paletami a transformace pomoc\u00ed instrukc\u00ed SSE4.1. Byly optimalizov\u00e1ny zpracovatele pro kvantov\u00e1n\u00ed, kop\u00edrov\u00e1n\u00ed blok\u016f, v\u00fdpo\u010det zkreslen\u00ed a posuzov\u00e1n\u00ed subpixelov\u00fdch rozd\u00edl\u016f.\n<li class=\"l\"> Pro syst\u00e9my ARM byly p\u0159id\u00e1ny varianty zpracovatel\u016f urychlen\u00e9 procesorov\u00fdmi instrukcemi Neon.\n<\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66596\">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 4.3.0 (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 \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":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-184097","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - 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 4.3.0 (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 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