Sakin dav1d 0.6, mai rikodin AV1 daga ayyukan VideoLAN da FFmpeg

VideoLAN da FFmpeg al'ummomin aka buga sakin ɗakin karatu na dav1d 0.6.0 tare da aiwatar da wani madadin tsarin rikodin bidiyo na kyauta AV1. An rubuta lambar aikin a cikin yaren C (C99) tare da abubuwan haɗawa (NASM/GAS) da rarraba ta ƙarƙashin lasisin BSD. Ana aiwatar da goyan bayan x86, x86_64, ARMv7 da gine-ginen ARMv8, da Linux, Windows, macOS, Android da iOS tsarin aiki.

Laburaren dav1d yana goyan bayan duk fasalulluka na AV1, gami da manyan ra'ayoyi subsampling da duk sigogin kula da zurfin launi da aka bayyana a cikin ƙayyadaddun (8, 10 da 12 bits). An gwada ɗakin karatu akan babban tarin fayiloli a cikin tsarin AV1. Muhimmin fasalin dav1d shine mayar da hankali ga cimma mafi girman aiki mai yuwuwar yankewa da kuma tabbatar da ingantaccen aiki a yanayin zaren da yawa.

A cikin sabon sigar:

• An aiwatar da ƙayyadaddun ƙayyadaddun kayan gini na ARM64 waɗanda ke rufe ayyuka da yawa yayin aiki tare da zurfin launi 10- da 12-bit.
• Ƙara ingantawa dangane da umarnin AVX-512 don prep_bilin, prep_8tap, cdef_filter da ayyukan mc_avg/w_avg/mask.
• Ƙara ingantawa dangane da umarnin SSSE3 don murkushe hayaniyar dijital.
• Ƙara ingantawa dangane da umarnin AVX2 don aikin msac_adapt16.
• Kafaffen bambance-bambancen da ba kasafai ba a cikin ɗabi'a tare da mai ƙididdigewa AV1;
• Ingantattun ingantawa don msac, cdef da ayyukan looprestoration don ARM64;
• Ingantattun abubuwan ingantawa na AVX2 don cdef_filter;
• An inganta ayyukan itxfm da cdef_filter a cikin yaren C.

Ka tuna cewa codec na bidiyo AV1 kungiyar ta bunkasa Bude Mai jarida (AOMedia), wanda ya ƙunshi kamfanoni irin su Mozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, Apple, CCN da Realtek. An sanya AV1 a matsayin samuwa a bainar jama'a, tsarin rikodin rikodin bidiyo na kyauta mara sarauta wanda ke gaban H.264 da VP9 dangane da matakan matsawa. A cikin kewayon shawarwarin da aka gwada, a matsakaicin AV1 yana ba da matakin inganci iri ɗaya yayin da rage bitrates da 13% idan aka kwatanta da VP9 da 17% ƙasa da HEVC. A babban bitrates, riba yana ƙaruwa zuwa 22-27% don VP9 kuma zuwa 30-43% don HEVC. A cikin gwaje-gwajen Facebook, AV1 ya zarce babban bayanin martaba H.264 (x264) da 50.3% dangane da matakin matsawa, babban bayanin H.264 ta 46.2%, da VP9 (libvpx-vp9) ta 34.0%.

source: budenet.ru