{"id":32804,"date":"2019-10-31T21:48:59","date_gmt":"2019-10-31T18:48:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/tretij-vypusk-dav1d-dekodirovshhika-av1-ot-proektov-videolan-i-ffmpeg\/"},"modified":"2019-10-31T21:48:59","modified_gmt":"2019-10-31T18:48:59","slug":"tretij-vypusk-dav1d-dekodirovshhika-av1-ot-proektov-videolan-i-ffmpeg","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/tretij-vypusk-dav1d-dekodirovshhika-av1-ot-proektov-videolan-i-ffmpeg","title":{"rendered":"Numri i tret\u00eb i dav1d, dekoduesi AV1 nga projektet VideoLAN dhe FFmpeg","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Komunitetet VideoLAN dhe FFmpeg publikuan<\/a><\/noindex> numri i tret\u00eb (0.3) i bibliotek\u00ebs dav1d me implementimin e dekoduesit alternativ t\u00eb lir\u00eb p\u00ebr formatin e kodit t\u00eb videos AV1<\/a><\/noindex>. Kodi i projektit \u00ebsht\u00eb shkruar n\u00eb gjuh\u00ebn C (C99) me inserte assembler (NASM\/GAS) dhe distribuohet<\/a><\/noindex> n\u00ebn licenc\u00ebn BSD. \u00cbsht\u00eb realizuar mb\u00ebshtetje p\u00ebr arkitektur\u00ebn x86, x86_64, ARMv7 dhe ARMv8, dhe sistemet operative Linux, Windows, macOS, Android dhe iOS.<\/p>\n

Biblioteka dav1d mb\u00ebshtet t\u00eb gjitha funksionalitetet e AV1, duke p\u00ebrfshir\u00eb llojet e avancuara t\u00eb subdiscretizimit<\/a><\/noindex> dhe t\u00eb gjitha parametrat e deklaruar n\u00eb specifikacionin e kontrollit t\u00eb thell\u00ebsis\u00eb s\u00eb ngjyr\u00ebs (8, 10 dhe 12 bit). Funksionimi i bibliotek\u00ebs \u00ebsht\u00eb testuar n\u00eb nj\u00eb koleksion t\u00eb gjer\u00eb skedar\u00ebsh n\u00eb formatin AV1. Nj\u00eb karakteristik\u00eb ky\u00e7e e dav1d \u00ebsht\u00eb orientimi ndaj arritjes s\u00eb performanc\u00ebs maksimale t\u00eb dekodimit dhe sigurimi i nj\u00eb funksionimi t\u00eb kualitetit n\u00eb modalitetin shum\u00ebfisht\u00eb.<\/p>\n

N\u00eb versionin e ri jan\u00eb shtuar optimizime t\u00eb ndryshme p\u00ebr t\u00eb p\u00ebrshpejtuar dekodimin e videos me ndihm\u00ebn e instrukcioneve SSSE3, SSE4.1 dhe AVX2. Shpejt\u00ebsia e dekodimit n\u00eb procesor\u00ebt me SSSE3 \u00ebsht\u00eb rritur me 24%, nd\u00ebrsa n\u00eb sistemet me AVX2 me 4%. \u00cbsht\u00eb shtuar kodi assembler p\u00ebr p\u00ebrshpejtim me ndihm\u00ebn e instrukcioneve SSE4.1, p\u00ebrdorimi i t\u00eb cilave ka lejuar rritjen e performanc\u00ebs me 26% krahasuar me versionin e paoptimizuar (krahasuar me optimizimet bazuar n\u00eb instrukcionet SSSE3, fitimi \u00ebsht\u00eb n\u00eb nivelin 1.5%). <\/p>\n

\"Numri<\/a><\/noindex><\/center><\/p>\n

Gjithashtu \u00ebsht\u00eb rritur performanca e dekoduesit n\u00eb pajisjet mobile me procesor\u00eb t\u00eb bazuar n\u00eb arkitektur\u00ebn ARM64. Fal\u00eb aplikimit t\u00eb operacioneve q\u00eb p\u00ebrdorin instrukcione NEON, krahasuar me versionin e kaluar, performanca \u00ebsht\u00eb rritur rreth 12%.
\n

\"Numri<\/a><\/noindex><\/center><\/p>\n

Krahasuar me dekoduesin referenc\u00eb aomdec (libaom), p\u00ebrpar\u00ebsia e dav1d ndihet m\u00eb s\u00eb shumti gjat\u00eb funksionimit n\u00eb m\u00ebnyr\u00eb multithread (n\u00eb disa teste dav1d \u00ebsht\u00eb m\u00eb i shpejt\u00eb 2-4 her\u00eb). N\u00eb m\u00ebnyr\u00eb nj\u00ebthreat, performanca ndryshon n\u00eb nivelin 10-20%.<\/p>\n

\"Numri<\/a><\/noindex><\/center>
\n
\"Numri<\/a><\/noindex><\/center><\/p>\n

Suksesi \u00ebsht\u00eb v\u00ebn\u00eb re n\u00eb p\u00ebrdorimin e dav1d n\u00eb projekte t\u00eb tjera. Nga e tani e tutje, dav1d tani p\u00ebrdoret<\/a><\/noindex> n\u00eb Chromium\/Chrome 74 dhe Firefox 67 (m\u00eb par\u00eb dav1d ishte p\u00ebrfshir\u00eb<\/a><\/noindex> p\u00ebr Windows, por tani aktivizuar<\/a><\/noindex> p\u00ebr Linux dhe macOS). P\u00ebrdorimi i dav1d n\u00eb FFmpeg dhe VLC \u00ebsht\u00eb vazhduar, dhe kalimi n\u00eb koduesin dav1d \u00ebsht\u00eb planifikuar Handbrake<\/a><\/noindex>.<\/p>\n

Duhet t\u00eb kujtojm\u00eb se kodeku video AV1<\/a><\/noindex> \u00ebsht\u00eb zhvilluar nga aleanca Open Media<\/a><\/noindex> (AOMedia), q\u00eb p\u00ebrfshin kompani si Mozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, CCN dhe Realtek. AV1 pozicionohet si nj\u00eb format kodimi video q\u00eb \u00ebsht\u00eb n\u00eb dispozicion publik dhe nuk k\u00ebrkon pages\u00eb t\u00eb licencave, i cili tejkalon ndjesh\u00ebm H.264 dhe VP9 n\u00eb nivelin e kompresimit. P\u00ebr t\u00eb gjith\u00eb gam\u00ebn e zgjidhjeve t\u00eb testuara, AV1 n\u00eb mesatarje ofron t\u00eb nj\u00ebjtin nivel cil\u00ebsie me nj\u00eb reduktim t\u00eb shpejt\u00ebsis\u00eb s\u00eb transferimit prej 13% n\u00eb krahasim me VP9 dhe 17% n\u00eb krahasim me HEVC. N\u00eb shpejt\u00ebsi t\u00eb larta transferimi, p\u00ebrfitimi rritet deri n\u00eb 22-27% p\u00ebr VP9 dhe deri n\u00eb 30-43% p\u00ebr HEVC. N\u00eb testet e Facebook, AV1 tejkaloi nivelin e kompresimit t\u00eb profilit kryesor H.264 (x264) me 50.3%, profilin e lart\u00eb H.264 me 46.2%, dhe VP9 (libvpx-vp9) me 34.0%. <\/p>\n

<\/a><\/noindex><\/p>\n

Burimi: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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Kodi i projektit \u00ebsht\u00eb i shkruar n\u00eb gjuh\u00ebn C (C99) me p\u00ebrfshirje assembleri (NASM\/GAS) dhe shp\u00ebrndahet n\u00ebn licenc\u00ebn BSD. \u00cbsht\u00eb realizuar mb\u00ebshtetje p\u00ebr arkitektur\u00ebn x86, x86_64, ARMv7 dhe ARMv8, si dhe p\u00ebr sistemet operative Linux, Windows, macOS, Android dhe iOS. 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