MKV → GIF

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 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 amtundu umodzi amatha kutenga nthawi zosiyana kuti afike pa GIF 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 GIF 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.

Sichoncho - GIF ndi fayilo ya chithunzi, ndipo imayamba nthawi yomwe imatha kusinthidwa ndipo siyimayendetsa kusewera, kuletsa kapena kuwongolera komweko. Izi ndi ziweto za mtunduwo kuposa tsamba lomwe limasungidwa, ndipo ndichifukwa chake chiwonetsero choyamba chimafunikira kwambiri pankhaniyi kuposa momwe chimakhalira pavidiyo: owerenga omwe akufuna kuchepetsa kuyendetsa, ndi maimelo omwe amatumiza mafayilo, amawona kuti fayiloyo ndi yokha. Sankhani malo oyamba omwe fayilo yoyamba imawerenga moyenera.

Animated GIF imagwira ntchito bwino kwambiri pa mavidiyo opitilira masekondi 10. Pambuyo pake, fayilo imawoneka ngati mabala (GIF ndi yosasinthika). Panthawi ya animations yaitali, imagwiritsa ntchito WebP kapena APNG, zomwe zonse zimagwiritsidwa ntchito pogwiritsa ntchito kusindikiza kwa video-codec-grade ndi kukulitsa bwino.

GIF yokhala ndi ma animations: 2 mpaka 8 MB pa 480p malinga ndi kuvuta kwa kugwira ntchito. WebP yokhala ndi ma animations: 200 KB mpaka 1 MB pa kusiyana kwa kutalika ndi kukula kwa zithunzi. GIF ndi lossless koma ndi kapangidwe ka 256-zobiriwira pa mbale, pogwiritsa ntchito LZW kusamvana ndi imodzi-kolo binary kuwala.

Mwa default timalowetsa mpaka 15 fps kwa GIF yoanima (yokhala ndi mavuto owoneka bwino kuposa 25 fps) ndi 24 fps kwa WebP / APNG yoanima (yoyang'anira mitengo yotsika bwino).

Sichoncho — mtundu wa GIF wokhala ndi ma animations (GIF, WebP, APNG) susunga mawu. Ngati mukufuna mawu, yesani mtundu wa kanema (MP4, WebM) m'malo mwa mtundu wa chithunzi chokhala ndi ma animations.

Ndiyo — njira yowerengera loop-count imawongolera ngati GIF imayenda mopanda malire (zosasinthika), imasewera nthawi N, kapena imasewera nthawi imodzi. Kuwerengera kwa loop kusungira mu metadata ya GIF yokhala ndi bokosi ndipo imavomerezedwa ndi aliyense woonera watsopano.

Zifukwa ziwiri zofala. Choyamba, kuchepetsa kuchuluka kwa mafremu: 15 fps GIF kuchokera ku 60 fps MKV kumachepetsa 75% ya mafremu; kuchotsa ndi slider ya kuchuluka kwa mafremu. Chachiwiri, kuwonjezera kwa palette: GIF imatha kujambula mpaka 256 ya mitundu ndipo gradient-heavy MKV imawoneka bwino. Sungani ku WebP yoanima kuti mudziwe momwe zinthu ziliri ndi mitundu yonse.

Ndiyo — njira yosintha kukula imachepetsa MKV kumbuyo pa kutulutsa ma frame, zomwe zimachepetsa kwambiri kukula kwa fayilo ya GIF. 480p GIF kuchokera ku 4K MKV ndi pafupifupi 16x yaying'ono kuposa 4K GIF. Pezani /video-cutter/ kuti muchepetse m'njira yosiyana.