WebM → GIF

Vula kumdlali, fumana ixesha kwaye uqaphele ikhowudi yexesha, kuba i WebM 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-WebM ilungile naphi na ngaphandle kwebrowser - abahleli bevidiyo, ii-galeri zefowuni eziqhelekileyo kunye neSmart TVs ziyihoyi kakhulu.

Ayiyo umfanekiso, kuphela ulinde. A WebM yi Matroska- usapho lwesiqulathi seefayili, kwaye elo sapho ligcina isiqulathi seefayili kunye ne codec ngokudibeneyo - into efile igcinayo ngokuqinisekileyo yagqibwa xa yabhalwa kwaye ayibhekiswa kuyo ngesiqendu. Umguquli uguqula uguqulo oluthile lweefayile kwi-codec. Ixabiso lokuguqulela olungafaniyo: i-codec entsha, esebenzayo ithatha ixesha elide lokususa ibhokisi kunezinye ezidala, ngoko ii WebM iifayile ezimbini zobude obufanayo zingathatha ixesha elihlukileyo eliphawulekayo ukufinyelela 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 akufana nokwazi ukupapasha 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 - a GIF yifayile yomfanekiso, ngoko iqala kwixesha elidlulileyo likhowudiwe kwaye alikho dlala, liphumle okanye lilawula ukucoca naphi na. Eli lipropati yefomati kunokuba yephepha lihlala kuyo, kwaye yiyo loo nto isakhelo sokuqala sibalulekile ngakumbi apha kunokuba sikwenze kwividiyo: abafundi abacelayo utshintsho oluncinane, kunye nabaxhasi beposi ababonisa isakhelo esinye kuphela, bona loo sakhelo kwaye akukho nto enye. Khetha indawo yokuqalisa apho isakhelo sokuvula sifunda ngokuzimeleyo.

I-animated GIF ilingana neeklipi ezingaphantsi kwee-10 zeesekondi. Ii-clip ezide kunezo zikhupha i-balloons ngokukhawuleza — i-GIF ayicinyiswanga-nge-frame nganye, ngoko ke nakwi-clip ezincinci ziqhuba kwi-megabytes ezininzi. Kwii-animations ezide, khangela i-animated WebP okanye APNG, zombini ezizicinyise ngokufana nee-codecs zevidiyo zakudala.

I-GIF ekhoyo kwi-480p ifumana 2-8 MB ngokuxhomekeka kwi-motion complexity. I-WebP ekhoyo kwi-resolution / umgangatho ofanayo, ilindele 200 KB ukuya kwi-1 MB — i-WebP ekhoyo isebenza 5-10x kakuhle kune-GIF kwi-visual quality efanayo. 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-15 fps ye-GIF ephilileyo (i-GIF isebenza kakubi ngaphezulu kwe-25 fps kwizibonisi ezininzi) kunye ne-24 fps ye-WebP / APNG ephilileyo (ephatha i-rate ephezulu kakuhle). Ukhetho lwe-frame-rate lugqitha okumiselweyo ukulondoloza i-rate yombhalo ovela kwi-WebM yakho ukuba i-target viewer yakho ixhasa loo nto.

Hayi — iifomati eziboniswayo GIF (GIF, WebP, APNG) azigcinanga isandi. Ukuba ufuna isandi neclip yakho, cwangcisa isiqulathi sevidiyo (MP4, WebM, MKV) endaweni ye GIF. Ii-embeds ezininzi zezentlalo (Twitter, Discord) ziguqula ngokusesikweni ukufaka i-MP4 kwi-GIF-style autoplay loops, zikunika okulungileyo kwezi zimbini.

Ewe - ukhetho lokubala i-loop lulawula ukuba i-GIF ijikeleza kungekho kuphela kwayo (okungagqibekanga), idlala i-N amaxesha, okanye idlala kabini kwaye i stops. Ubalo lwe-loop lugcinwa kwi-GIF i-metadata yesiqulathi seefayili kwaye luhlonishwa ngumbonisi wonke omtsha, umkhangeli wewebhu, kunye nokufaka umgangatho.

Izizathu ezimbini eziqhelekileyo: ukunyuka kwesampulu ye-frame-rate (sikhupha i-30 fps WebM ukuya kwi-15 fps GIF ngokumiselweyo — sikhuphe ukhetho lwe-frame-rate ukuze sibuyisele ulusu) kunye nokunyuka kwesampulu yengqokelela yezixhobo (i-GIF imiselwe kuma-256 amibala nge-frame, eyenza i-posterize iithayile ngendlela eyenziwe ngayo i-WebM yokuqala). Tshintsha isiphelo kwi-WebP ephefumlelweyo ukuqinisekisa umbala opheleleyo.

Ewe - ukhetho lokuguqula ubungakanani lunyusa ingxelo ezantsi phambi kokukhupha isakhelo, esenza ukuba ubungakanani besiphelo GIF bube ngaphantsi kakhulu. I-480p GIF eyenziwe kwi-4K WebM incinci nge-16x kwidiski kune-4K GIF. Ukutywina kuphathwa kwi /trim/ okanye /crop/ inkqubo yokuhamba yenyathelo ehlukileyo phambi kokuguqulwa.