MKV → WebP

Ndiko, ndipo ndi njira yofulumira kwambiri kupeza nthawi mukufuna. A MKV amasunga bokosi mabala m'chipinda monga anatchedwa timestamps, kotero mndandanda angawerengedwe mosalekeza kuchokera pa fayilo ndi m'mbali-point padded mu start-time nyanja mosiyana ndi kukhala anapha kwa ndi maso. Kupatsa izo nthawi yopitilira pamodzi ndi kokha kuti span ndi decoded, amene ndi chifukwa chake m'lifupi la MKV kumapeto amachititsa pafupifupi palibe kusiyana kuti nthawi yayitali ntchito amatenga. MKV ndi archived chidebe cha kusankha chifukwa amasunga unlimited audio nyimbo, softsubs, mfundo ofotokoza ndi kukhudza zojambulajambula mu imodzi wapamwamba.

Sichiwonetsero, koma kungoyembekezera. A MKV ndi chotengera cha banja la Matroska, ndipo banjali limasunga chotengera ndi codec mosiyana - zomwe fayiloyo imasunga moyenera zidasankhidwa pamene idalemba ndipo sichitanthauza kuti ndi chida. Wosintha amachotsa chilichonse chomwe chimapeza kumbuyo kwa mafayilo oyambirira, ndipo ma frame omwe ali ndi mawonekedwe omwe ali ndi mawonekedwe omwe ali ndi mawonekedwe omwe amapanga. Kuchotsa mtengo sikunakhalepo: ma codecs atsopano, ogwira ntchito bwino amatenga nthawi zambiri kuti azichotsa kuposa omwe ali ndi zaka zambiri, kotero ma MKV awiri a mafayilo azaka zofanana zingatenge nthawi zosiyana kuti afike pa WebP imodzi. MKV ndi codec-agnostic: H.264, HEVC, VP9 ndi AV1 kanema kulowa bwino mbali AAC, FLAC, Opus, DTS kapena Dolby Audio mu imodzi wapamwamba.

Chifukwa MKV siyimagwiritsa ntchito masamba a kontena omwe ali ndi udindo wothandizira, ndipo zomwe zimapanga zimasintha kuposa kutsimikizika. Sichisintha chilichonse pazosintha - fayilo imasinthidwa patsamba la seva, choncho chotengera chomwe chimalepheretsa chosinthira chosinthira bwinobwino, ndipo palibe pakompyuta komwe kumafunikira kuti chigwiritsidwe ntchito. Zimafunika kudziwa momwe malonda amagwira ntchito, ngakhale: animated WebP yomwe imabwerera ndi mtundu womwe umawoneka patsamba lililonse, ndipo izi zimasintha clip kuchokera ku chinthu chomwe webu sichidzakhudza ku chinthu chomwe chidzachitike. MKV ali pafupifupi palibe native hardware thandizo - foni, mawebusayiti ndi TVs nthawi zambiri ayenera VLC kapena remux pamaso iwo adzasewera.

Lossy, kwa chilichonse chomwe chimayamba ngati kanema. Animated WebP ingakongoletse ma frame ake mosiyana: mode ya lossless imasunga ma pixel onse ndi kugwirizana ndi zithunzi zopanda malire ndi mawu a pazenera, pomwe mode ya lossy imagwiritsa ntchito kuyembekezera kwa block-based monga momwe video codec imagwiritsa ntchito ndi kugwirizana ndi zithunzi zachilendo. Frames za kamera ndi zokhala ndi ma grains ndi gradients omwe lossless compression sapeza mzere, choncho animation ya lossless ya kanemayo imatha kuyendetsa nthawi zambiri kuposa ya lossy yomwe ikuwoneka ngati yofanana. Ikani ya lossy ngati kuti chiyambi chake chinali kujambula kwa skrini kwa mawu owoneka bwino. WebP ndibe yachiwiri-katundu kunja kwa browser — kusindikiza workflows, zaka zakale Office zomanga ndi ena foni galleries sakuvomereza izo.

Animated WebP imakula kwa ma clip pansi pa masekondi 10. Kutalika kuposa apo ndi ma baffles otsika kwambiri - GIF ndi opanda kulumikizana pa frame, kotero ngakhale ma clip otsika amayenda kwa ma megabytes ambiri. Kwa ma animations ochepa, tikufuna kulenga WebP kapena APNG, omwe amagwirizana ndi ma codecs amakono a video.

Kwa animated GIF pa 480p, zotsatira zofala ndi 2-8 MB kutengera kuthekera kwa kugwira ntchito. Kwa animated WebP pazomwezo / kudalirika, yembekezerani 200 KB mpaka 1 MB. Animated WebP ndi 5-10x yogwira ntchito bwino kuposa GIF pazomwezo. WebP amapatsa modes lossy ndi lossless, ndi alpha kuwala ndi animation alipo m'modzi kapena m'modzi.

Mwa default timalowetsa mpaka 15 fps kwa GIF yoanima (GIF imagwira ntchito mosakwanira pamwamba pa 25 fps m'mawonera ambiri) ndi 24 fps kwa WebP / APNG yoanima (yoyang'anira mitengo yotsika bwino). Chosankha cha frame-rate chimachotsa default kuti chiteteze mitengo yochokera ku MKV yanu ngati wowonera wanu wosankhidwa akuthandizira.

Sichoncho - animated WebP mafomu (GIF, WebP, APNG) sasunga mawu panthawi iliyonse. Ngati mukufuna mawu ndi clip yanu, gwiritsani ntchito kanema wokhala ndi kanema (MP4, WebM, MKV) osati WebP. Masamba ambiri a bungwe (Twitter, Discord) amasintha kutsitsa kwa MP4 kukhala ma loops a GIF-style autoplay, ndikukupatsani zabwino zonse.

Ndikoyenera - njira yowerengera loop-count imawongolera ngati WebP imayenda mopanda malire (default), imasewera nthawi N, kapena imasewera kamodzi ndipo imatha. Kuwerengera kwa loop kusungira mu WebP metadata ya kontena ndipo imalemekeza aliyense woonera wamakono, webusaitiyi, ndi embed surface.

Zifukwa ziwiri zofala kwambiri: kuchepetsa kuchuluka kwa ma frame (timangochotsa 30 fps GIF MKV mpaka 15 fps mwa default — timangosintha kuchuluka kwa ma frame kuti tibwezeretse kuwala) ndi kuwonjezera kwa palette (GIF imatha kujambula mpaka 256 za mitundu pa frame, zomwe zimasintha ma gradients mosiyana ndi momwe MKV yoyamba inapangira).

Ndiyo — njira yosintha kukula imachepetsa kukula kwa kanemayo pambuyo pochotsa ma frame, zomwe zimachepetsa kwambiri kukula kwa final WebP. 480p WebP yopangidwa kuchokera ku 4K MKV ndi 16x yaying'ono pa diski kuposa 4K WebP. Kudula kumachitika m'njira yosiyana ya /trim/ kapena /crop/ yothamanga pambuyo posintha.