ProHoster > Ibhulogi > iindaba ze-intanethi > Ukukhutshwa kwe-dav1d 0.7, i-AV1 decoder evela kwi-VideoLAN kunye neeprojekthi zeFFmpeg

Ukukhutshwa kwe-dav1d 0.7, i-AV1 decoder evela kwi-VideoLAN kunye neeprojekthi zeFFmpeg

VideoLAN kunye noluntu lweFFmpeg ipapashiwe ukukhutshwa kwethala leencwadi le-dav1d 0.7.0 ngomiliselo lwesinye isidikhowuda sefomathi yekhowudi yevidiyo yasimahla AV1. Ikhowudi yeprojekthi ibhalwe kwi-C (C99) kunye nokufakwa kwe-assembler (NASM / GAS) kunye isasazwa ngu phantsi kwelayisensi ye-BSD. Inkxaso ye-x86, x86_64, i-ARMv7 kunye ne-ARMv8 izakhiwo, kunye ne-Linux, i-Windows, i-macOS, i-Android kunye neenkqubo zokusebenza ze-iOS ziphunyeziwe.

Ithala leencwadi le-dav1d lixhasa zonke iimpawu ze-AV1, kuquka iimbono eziphambili isampuli kunye nazo zonke iiparamitha zokulawula ubunzulu bombala ezichazwe kwiinkcukacha (8, 10 kunye ne-12 bits). Ithala leencwadi livavanyiwe kwingqokelela enkulu yeefayile kwifomathi ye-AV1. Eyona nto iphambili ye-dav1d kugxininiso lwayo ekufezekiseni owona msebenzi uphezulu wokwenza iikhowudi kunye nokuqinisekisa umsebenzi okumgangatho ophezulu kwimowudi enemisonto emininzi.

Π’ inguqulelo entsha:

  • Ukuphunyezwa kwe-refmv (Dynamic Reference Motion Vector Prediction) kwandiswe malunga ne-12% ngelixa kuncitshiswa ukusetyenziswa kwememori malunga ne-25%;
  • Ukuphunyezwa kwe-ARM64 ye-architecture-specific optimizations iphantse yagqitywa, iquka imisebenzi emininzi xa isebenza ngobunzulu bombala we-8, 10 kunye ne-12 bits;
  • Isihluzi se-CDEF esongeziweyo usebenzisa imiyalelo ye-AVX-512;
  • Ukongezwa okutsha okusekwe kwi-AVX2 kunye nemiyalelo ye-SSSE3;
  • Isixhobo se-dav1dpla siphucule inkxaso yokusebenza ngobunzulu bombala we-10-bit, i-non-4: i-2: iifomati ze-pixel ze-0 kunye nokunciphisa ingxolo yedijithali kwi-GPU.

Khumbula ukuba ikhowudi yevidiyo AV1 iphuhliswe lumanyano Vula iMedia (AOMedia), eneenkampani ezifana neMozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, Apple, CCN kunye neRealtek. I-AV1 ibekwe njengefomathi efumanekayo esidlangalaleni, engahlawulelwanga simahla yokufaka ikhowudi yevidiyo ebonakala iphambi kwe-H.264 kunye ne-VP9 ngokwemigangatho yoxinzelelo. Kuluhlu lwezigqibo ezivavanyiweyo, kwi-avareji ye-AV1 inikezela umgangatho ofanayo womgangatho ngelixa inciphisa i-bitrate nge-13% xa kuthelekiswa ne-VP9 kunye ne-17% ngaphantsi kwe-HEVC. Kwi-bitrate ephezulu, inzuzo iyanda kwi-22-27% ye-VP9 kunye ne-30-43% ye-HEVC. Kwiimvavanyo ze-Facebook, i-AV1 iphumelele iphrofayili ephambili ye-H.264 (x264) nge-50.3% ngokwenqanaba loxinzelelo, i-high profile H.264 nge-46.2%, kunye ne-VP9 (libvpx-vp9) nge-34.0%.

umthombo: opennet.ru

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