Imiphakathi ye-VideoLAN ne-FFmpeg eshicilelwe ukukhishwa komtapo wezincwadi we-dav1d 0.7.0 ngokusetshenziswa kwesinye isiqophi sefomethi yamahhala yokufaka ikhodi yevidiyo AV1. ΠΠΎΠ΄ ΠΏΡΠΎΠ΅ΠΊΡΠ° Π½Π°ΠΏΠΈΡΠ°Π½ Π½Π° ΡΠ·ΡΠΊΠ΅ C (C99) Ρ Π°ΡΡΠ΅ΠΌΠ±Π»Π΅ΡΠ½ΡΠΌΠΈ Π²ΡΡΠ°Π²ΠΊΠ°ΠΌΠΈ (NASM/GAS) ΠΈ isatshalaliswa ngu ngaphansi kwelayisensi ye-BSD. Usekelo lwezakhiwo ze-x86, x86_64, ARMv7 kanye ne-ARMv8, kanye ne-Linux, Windows, macOS, Android kanye nezinhlelo zokusebenza ze-iOS ziyasetshenziswa.
Umtapo wezincwadi we-dav1d usekela zonke izici ze-AV1, kuhlanganise nokubukwa okuthuthukile amasampula amancane kanye nawo wonke amapharamitha okulawula ukujula kombala ashiwo ekucacisweni (8, 10 kanye no-12 bits). Ilabhulali ihlolwe eqoqweni elikhulu lamafayela ngefomethi ye-AV1. Isici esiyinhloko se-dav1d ukugxila kwayo ekufinyeleleni ukusebenza kokukhipha amakhodi okuphezulu kakhulu nokuqinisekisa umsebenzi wekhwalithi ephezulu ngemodi enezintambo eziningi.
Π inguqulo entsha:
- ΠΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΡ ΡΠ΅Π°Π»ΠΈΠ·Π°ΡΠΈΠΈ refmv (Dynamic Reference Motion Vector Prediction) ΡΠ²Π΅Π»ΠΈΡΠ΅Π½Π° ΠΏΡΠΈΠΌΠ΅ΡΠ½ΠΎ Π½Π° 12% ΠΏΡΠΈ ΡΠΎΠΊΡΠ°ΡΠ΅Π½ΠΈΠΈ ΠΏΠΎΡΡΠ΅Π±Π»Π΅Π½ΠΈΡ ΠΏΠ°ΠΌΡΡΠΈ ΠΏΡΠΈΠΌΠ΅ΡΠ½ΠΎ Π½Π° 25%;
- ΠΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΈ Π·Π°Π²Π΅ΡΡΠ΅Π½Π° ΡΠ΅Π°Π»ΠΈΠ·Π°ΡΠΈΡ ΡΠΏΠ΅ΡΠΈΡΠΈΡΠ½ΡΡ
Π΄Π»Ρ Π°ΡΡ
ΠΈΡΠ΅ΠΊΡΡΡΡ ARM64 ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΠΉ, ΠΎΡ
Π²Π°ΡΡΠ²Π°ΡΡΠΈΡ
ΠΌΠ½ΠΎΠ³ΠΈΠ΅ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ ΠΏΡΠΈ ΡΠ°Π±ΠΎΡΠ΅ Ρ Π³Π»ΡΠ±ΠΈΠ½ΠΎΠΉ ΡΠ²Π΅ΡΠ° Π² 8, 10 ΠΈ 12 Π±ΠΈΡ;
- ΠΠΎΠ±Π°Π²Π»Π΅Π½ ΡΠΈΠ»ΡΡΡ CDEF, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡΠΈΠΉ ΠΈΠ½ΡΡΡΡΠΊΡΠΈΠΈ AVX-512;
- ΠΠΎΠ±Π°Π²Π»Π΅Π½Ρ Π½ΠΎΠ²ΡΠ΅ ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΠΈ Π½Π° Π±Π°Π·Π΅ ΠΈΠ½ΡΡΡΡΠΊΡΠΈΠΉ AVX2 ΠΈ SSSE3;
- Π ΡΡΠΈΠ»ΠΈΡΠ΅ dav1dpla ΡΠ»ΡΡΡΠ΅Π½Π° ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ° ΡΠ°Π±ΠΎΡΡ Ρ Π³Π»ΡΠ±ΠΈΠ½ΠΎΠΉ ΡΠ²Π΅ΡΠ° Π² 10 Π±ΠΈΡ, Ρ ΠΏΠΈΠΊΡΠ΅Π»ΡΠ½ΡΠΌΠΈ ΡΠΎΡΠΌΠ°ΡΠ°ΠΌΠΈ Π½Π΅-4:2:0 ΠΈ ΠΏΠΎΠ΄Π°Π²Π»Π΅Π½ΠΈΠ΅ΠΌ ΡΠΈΡΡΠΎΠ²ΠΎΠ³ΠΎ ΡΡΠΌΠ° Π½Π° GPU.
Khumbula ukuthi ikhodekhi yevidiyo AV1 ithuthukiswe umbimbi Vula imidiya (AOMedia), ehlanganisa izinkampani ezifana ne-Mozilla, Google, Microsoft, Intel, ARM, NVIDIA, IBM, Cisco, Amazon, Netflix, AMD, VideoLAN, Apple, CCN kanye ne-Realtek. I-AV1 ibekwe njengefomethi yombhalo wekhodi wevidiyo etholakala esidlangalaleni, engakhokhelwa mahhala edlula i-H.264 ne-VP9 ngokwezinga lokuminyanisa. Kulo lonke ububanzi bezinqumo ezihloliwe, ngokwesilinganiso i-AV1 iletha izinga elifanayo lekhwalithi kuyilapho yehlisa ama-bitrate ngo-13% uma kuqhathaniswa ne-VP9 kanye no-17% ngaphansi kune-HEVC. Kuma-bitrate aphezulu, inzuzo ikhuphuka ibe ngu-22-27% ye-VP9 futhi iye ku-30-43% ye-HEVC. Ezivivinyweni ze-Facebook, i-AV1 yedlule iphrofayili eyinhloko engu-H.264 (x264) ngo-50.3% ngokwezinga lokuminyanisa, iphrofayili ephezulu engu-H.264 ngo-46.2%, kanye ne-VP9 (libvpx-vp9) ngo-34.0%.
Source: opennet.ru