MP4 → GIF

Vula kumdlali, fumana ixesha kwaye uqaphele ikhowudi yexesha, kuba i MP4 ayisoloko ithatha uphawu lwesithuba sokuhamba. Cola oko kwindawo yexesha lokuqalisa, yongeza ixesha elithathayo, kwaye umguquli ukhangela kuloo ndawo kwaye ukhupha ikhowudi kuphela kwinqanaba ofunayo. Ukukhangela kulungile kwisakhelo, kodwa kunokuba kulungileyo kuphela njengenani elinikezelwa - khangela ngokuchasene nokujonga phambi koshicilelo phambi kokufaka ikhonkco elide. I-MP4 ixhasa kuphela ifomati enye ethandwayo yesihloko esingaphantsi (mov_text), nesandi esininzi esingenakuthembeka ngaphandle kwabadlali be-desktop.

I-MP4 yifayili ye-ISO esekelwe kwi-media, kwaye eli sapho lirekhoda ujikelezo njengeflegi kwisiqulathi seefayili kunokuba lijikeleze ii-pixels - oko kukuthi, iclip ethathwe ngokuthe nkqo kwifowuni ingabonakaliyo kumdlali omnye kwaye ihlale kwicala lakhe kwelinye. Umfanekiso ophilayo ukhiwa kwi-pixels ezifihliweyo, ngoko ke i-flegi kufuneka ihlolwe phambi kokuba i-frame yokuqala ibhalwe; ukuba ukujonga ngaphambili kubuyela umva, ujikeleze umthombo uguqule kwakhona. Zonke izinto ezingaphezulu malunga nekhamera okanye umhleli woshicilelo ziyimeko elula: umkhondo wevidiyo omnye, umsinga oqinileyo we-frames. I-MP4 eninzi eluhlaza yi-H.264 yevidiyo enesandi se-AAC; isiqulathi seefayili sigcina ngokusemthethweni i-HEVC, i-AV1 ne-VP9.

Ewe, xa ufumana ifayile ngokwayo. I MP4 yiyo esetyenziswa yi web yevidiyo ekwilayini ecacileyo kuba ibrowser idlala ngaphandle koplugin, ngoko iclip edlala kwi tab ihlala i MP4 eqhelekileyo egcina kwaye ikhupha apha njenge nayiphi na enye ifayile. Ukungafaniyo kumdlalo osasazayo onika iziqendu ezifutshane ezilinganisayo endaweni yefayile enye - ezi kufuneka zidityaniswe kwakhona phambi kokuba nantoni na iguqulwe. Iimvume ziyinto enye ekufuneka iqinisekiswe: ukukwazi ukulayisha ezantsi ividiyo akufana nokwazi ukupapasha kwakhona udweliso oluyenziweyo. I-MP4 yindawo ekhuselekileyo yokunikezelwa kweenkqubo ezifumanekayo - yonke ifowuni, ibrowser, i-console, umhleli kunye neSmart TV eyenziwe kwiminyaka elishumi edlulileyo idlala ngaphandle kwesoftware engaphezulu.

Hayi - a GIF yifayile yomfanekiso, ngoko iqala kwixesha elidlulileyo likhowudiwe kwaye alikho dlala, liphumle okanye lilawula ukucofa naphi na. Eli lipropati yefomati kunokuba yephepha lihlala kuyo, kwaye yiyo loo nto isakhelo sokuqala sibalulekile ngakumbi apha kunokuba kuvideo: abafundi abacela utshintsho oluncinane, kunye nabaxhasi beposi ababonisa isakhelo esinye kuphela, bona esi sakhelo kwaye akukho lutho olunye. Khetha indawo yokuqalisa apho isakhelo sokuvula sifunda ngokuzimeleyo.

I-animated GIF isebenza kakuhle kwii-clip ezingaphantsi kwee-seconds ezili-10. Kungaphezulu kwee-balloons zefayili (i-GIF ibalulekile kwi-frame nganye engacinezelwanga). Kwi-animations ezide injongo i-animated WebP okanye APNG, zombini zisebenzisa i-video-codec-grade compression ne-scale kakhulu.

I-GIF ephefumlelweyo: 2 ukuya 8 MB kwi-480p kuxhomekeke kunzima kokuhamba. I-WebP ephefumlelweyo: 200 KB ukuya kwi-1 MB kwi-resolution / umgangatho ofanayo. I-WebP ephefumlelweyo i-5 ukuya kwi-10x ingcono kune-GIF kumgangatho ofanayo wokubona. I-GIF ayilahleki kodwa iphele kwi-256-imibala yengqokelela yezixhobo ngesakhelo ngasinye, isebenzisa uxinzelelo lwe-LZW kunye nokukhanya okubini kombala omnye.

Ngokungagqibekanga siyikhupha i-sample ukuya kwi-15fps ye-GIF ejikelezayo (isebenza ngokubonakalayo ngaphezulu kwe-25fps) kunye ne-24fps ye-WebP / APNG ejikelezayo (ephatha i-rate ephezulu ngokucocekileyo). Nciphisa ngokugqithiseleyo nge-frame-rate option ukuba umbonisi wakho uxhasa i-source rate.

Hayi — iifomati GIF eziphilayo (i-GIF, i-WebP, i-APNG) azigcinwanga isandi. Ukuba ufuna isandi, misela isiqulathi sevidiyo (i-MP4, i-WebM) endaweni yefomati yomfanekiso ophilayo.

Ewe - ukhetho lokubala iilophu lulawula ukuba i GIF iilophu liphela (elimiselweyo), idlala i-N amaxesha, okanye idlala ngokuchanekileyo kabini. Ubalo lwelophu lugcinwa kwi GIF i-metadata yesiqulathi seefayili kwaye luhlolwe ngazo zonke izibonisi zexesha elidlulileyo.

Izizathu ezimbini eziqhelekileyo. Eyona, i-frame-rate downsampling: 15 fps GIF ukusuka kwi-60 fps MP4 ikhupha i-75% ye-frames; ilungisa nge-frame-rate slider. Eyona, i-palette quantification: i-GIF imiselwe kwimibala emi-256 kunye ne-gradient-heavy MP4 dithers ebonakalayo. Tshintsha kwi-WebP ejikelezayo yobuxoki bombala opheleleyo.

Ewe - ukhetho lokuguqula ubungakanani luyikhupha i-MP4 ezantsi phambi kokukhupha isakhelo, oluyikhupha ngokugqithisileyo ubungakanani befayili ye-GIF. I-480p GIF ukusuka kwi-4K MP4 incinci nge-16x kune-4K GIF. Sebenzisa /video-cutter/ ukutywina kwinyathelo elahlukileyo.