MOV → GIF

Ndiko, ndipo ndi njira yofulumira kwambiri kupeza nthawi mukufuna. A MOV 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 MOV kumapeto amachititsa pafupifupi palibe kusiyana kuti nthawi yayitali ntchito amatenga. MOV ndi mtundu wogwira ntchito olemba akufuna, chifukwa amasangalala anabwereza round-zoyendayenda mwa Final Cut Pro, Premiere ndi DaVinci Resolve popanda kuwonongeka kwa chitukuko.

A MOV ndi fayilo ya ISO base-media, ndipo izi zitha kusinthidwa ngati chiwonetsero chazithunzi mu chotengera, osati posintha ma pixels - chifukwa chake clip yomwe ikugwiritsidwa ntchito mozungulira pafoni ikhoza kuwonekera m'modzi mwa osewera ndikukhala pambali pamodzi. Animation imapangidwa kuchokera ku pixels yosinthidwa, kuti chiwonetserocho chiyenera kuvomerezedwa pambuyo polemba chiwonetsero choyamba; ngati chithunzicho chimabwerera m'mbali, sinthani malo ochokera ndikusinthanso. Zonse zina za kamera kapena wolemba wolemba ndi nkhani yovuta: kanema wa kanema, mzere wokhazikika wa ma frame. A MOV nthawi zambiri amatenga H.264 kapena HEVC kwa kutumiza, kapena ProRes pamene ndi kusintha mtsogoleri, limodzi ndi AAC kapena uncompressed PCM audio.

Chifukwa MOV 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. MOV owona ndi lalikulu, ndi kunja kwa Apple ecosystem kusewera thandizo ndi patchier kuposa MP4 - atsopano Android amaumba ndi ena Smart TVs adzakana iwo.

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 MOV 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 MOV imawoneka bwino. Sungani ku WebP yoanima kuti mudziwe momwe zinthu ziliri ndi mitundu yonse.

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