WebM → GIF

Vula kumdlali, fumana ixesha kwaye uqaphele ikhowudi yexesha, kuba WebM ayisoloko ithatha uphawu lwesithuba sokuhamba. Ncamathisela kulo mhlaba wexesha lokuqalisa, yongeza ixesha elithathayo, kwaye umguquli ukhangela kulo mfanekiso kwaye ukhupha ikhowudi kuphela kwinqanaba olumkileyo. Ukukhangela kulungile kwisakhelo, kodwa kunokuba kulungileyo kuphela njengenani elinikezelwa - khangela ngokuchasene nokujonga phambi koshicilelo phambi kokufaka ikhonkco elide. I-WebM ilungile naphi na ngaphandle kwebrowser - abahleli bevidiyo, ii-galeri zefowuni ezisemthethweni kunye neSmart TVs ziyihoyi kakhulu.

Ayiyiyo imifanekiso, kuphela ulinde. A WebM yi Matroska- usapho lwesiqulathi seefayili, kwaye elo sapho ligcina isiqulathi seefayili kunye ne codec ngokudibeneyo - into efile igcina ngokuqinisekileyo yagqibwa xa yabhalwa kwaye ayibhekiswa kuyo ngesiqendu. Umguquli uguqula uguqulo oluthile kwifomathi eyenziweyo kuqala, kwaye ezo fayile zifana nokuba yeyiphi ifomathi eyenziweyo. Ukuguqula uguqulo luthile kubiza kakhulu: i-codecs ezitsha, ezisebenzayo zithatha ixesha elide lokususa ibhokisi kunezo zakudala, ngoko ii WebM iifayile ezimbini zobude obufanayo zingathatha ixesha elihlukileyo lokufikelela kwi-GIF efanayo. I-WebM imiselwe ukuba incinci: i-VP8 okanye i-VP9 ividiyo (i-AV1 ngoku isasazeka) ene-Vorbis okanye i-Opus isandi, akukho nto enye.

Ewe, xa ufumana ifayile. I WebM yiyo esetyenziswa yi web kwividiyo ekwilayini ecacileyo kuba ibrowser idlala ngaphandle koplugin, ngoko iclip edlala kwi tab ihlala i WebM eqhelekileyo egcina kwaye ikhupha apha njenge nayiphi na enye ifayile. Ukungafaniyo kumdlalo osasazayo onika iziqendu ezifutshane ezilinganisayo endaweni yefayile enye - ezi kufuneka ziphinde zidityaniswe phambi kokuba nantoni na iguqulwe. Iimvume ziyinto enye ekufuneka iqinisekiswe: ukukwazi ukulayisha ezantsi ividiyo ayifani nokuba uvunyelwe ukushicilela kwakhona udweliso oluyenziweyo. I-WebM idlala ngokusemthethweni kwi-browser nganye ekhoyo ngoku ngaphandle kokufaka, ngaphandle kwelayisensi yemali, ngaphandle kokubonisa ipateni, eyenza ukuba imiselwe kwividiyo efakwe kwi-web.

Hayi - i GIF yifayile yomfanekiso, ngoko iqala kwixesha elidlulileyo likhowudiwe kwaye alikho dlala, liphumle okanye lilawula ukucofa naphi na. Eli lipropati yefomati kunokuba liphepha elihlala 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 WebM ikhupha i-75% ye-frames; ilungisa nge-frame-rate slider. Eyona, i-palette quantification: i-GIF imiselwe kwimibala emi-256 kunye ne-gradient-heavy WebM dithers ebonakalayo. Tshintsha kwi-WebP ejikelezayo yobuxoki bombala opheleleyo.

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