Sakin dav1d 0.7, mai rikodin AV1 daga ayyukan VideoLAN da FFmpeg

VideoLAN da FFmpeg al'ummomin aka buga sakin ɗakin karatu na dav1d 0.7.0 tare da aiwatar da wani madadin tsarin rikodin bidiyo na kyauta AV1. An rubuta lambar aikin a cikin C (C99) tare da abubuwan da ake sakawa (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.

В sabon sigar:

• Ayyukan refmv (Dynamic Reference Motion Vector Prediction) aiwatarwa yana ƙaruwa da kusan 12% yayin da rage yawan ƙwaƙwalwar ajiya da kusan 25%;
• Aiwatar da ƙayyadaddun ƙayyadaddun ƙayyadaddun kayan gini na ARM64 ya kusan cika, yana rufe ayyuka da yawa lokacin aiki tare da zurfin launi na 8, 10 da 12 bits;
• Ƙara CDEF tace ta amfani da umarnin AVX-512;
• Ƙara sabon haɓakawa bisa AVX2 da umarnin SSSE3;
• Mai amfani da dav1dpla ya inganta tallafi don aiki tare da zurfin launi na 10-bit, wanda ba 4: 2: 0 tsarin pixel da kuma hana amo na dijital akan GPU.

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