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Kuburitswa kwedav1d 0.7, AV1 decoder kubva kuVideoLAN neFFmpeg mapurojekiti

VhidhiyoLAN uye FFmpeg nharaunda yakabudiswa kuburitswa kwedav1d 0.7.0 raibhurari nekushandiswa kweimwe yemahara vhidhiyo encoding fomati decoder. AV1. Iyo kodhi yeprojekiti yakanyorwa muC (C99) ine magungano ekuisa (NASM/GAS) uye inoparadzirwa ne pasi peBSD rezinesi. Tsigiro yex86, x86_64, ARMv7 uye ARMv8 architecture, uye Linux, Windows, macOS, Android uye iOS masisitimu anoshanda.

Iyo dav1d raibhurari inotsigira ese maAV1 maficha, kusanganisira epamusoro maonero subsampling uye ese mavara akadzika ekudzora ma paramita akataurwa mune yakatarwa (8, 10 uye 12 bits). Raibhurari yakaedzwa pane yakakura muunganidzwa wemafaira muAV1 fomati. Chinhu chakakosha chedav1d ndechekutarisa kwayo pakuwana yakanyanya kunaka decoding kuita uye kuve nechokwadi chepamusoro-soro basa mune akawanda-akarukwa maitiro.

Π’ shanduro itsva:

  • Kuitwa kweiyo refmv (Dynamic Reference Motion Vector Prediction) kuitiswa kunowedzerwa neinenge 12% uku ichideredza kushandiswa kwendangariro ne25%;
  • Kuitwa kweArM64 architecture-specific optimizations inenge yapera, ichivhara maoperation akawanda kana uchishanda neruvara rwakadzika rwe8, 10 uye 12 bits;
  • Yakawedzera CDEF sefa uchishandisa AVX-512 mirayiridzo;
  • Yakawedzera optimizations nyowani yakavakirwa paAVX2 uye SSSE3 mirairo;
  • Iyo dav1dpla utility yakavandudza tsigiro yekushanda negumi-bit ruvara kudzika, kwete-10: 4: 2 pixel mafomati uye dhijitari ruzha kudzvinyirira paGPU.

Rangarira kuti vhidhiyo codec AV1 yakagadzirwa nemubatanidzwa Vhura Midhiya (AOMedia), iyo inoratidzira makambani akadai seMozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, Apple, CCN uye Realtek. AV1 yakamisikidzwa sechinhu chinowanika pachena, chisingabhadharise mavhidhiyo encoding fomati iri pamberi peH.264 neVP9 maererano nekumanikidzana. Pakati pemhando dzezvisarudzo zvakaedzwa, paavhareji AV1 inopa mwero wakafanana wemhando uku ichidzikisa bitrate ne13% zvichienzaniswa neVP9 uye 17% yakaderera pane HEVC. Pakukwira kwema bitrate, kuwana kunowedzera kusvika 22-27% yeVP9 uye kusvika 30-43% yeHEVC. Mumiedzo yeFacebook, AV1 yakapfuura chimiro chikuru H.264 (x264) ne50.3% maererano nedanho rekumanikidza, chimiro chepamusoro H.264 ne46.2%, uye VP9 (libvpx-vp9) ne34.0%.

Source: opennet.ru

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