MKV → WebP

Ewe, kwaye yindlela ekhawulezayo yokufumana ixesha ofuna. A MKV igcina iziqendu eziphawulweyo kwisiqulathi seefayili njengeziphawuli zexesha ezibizwa ngokuba zii-timestamps, ngoko uluhlu lunokufundwa ngokuthe ngqo kwifayile kunye ne-in-point ecoliweyo kwindawo yexesha lokuqalisa endaweni yokuqhutywa ngesandla. Nceda unikezele ixesha elifutshane kunye nokuphela kwexesha elifutshane lidecoded, oko kukuthi, ubude becala le MKV yenza akukho tshintsho kwixesha elide lomsebenzi othathayo. I-MKV yindawo yokugcina ekhethiweyo kuba igcina iingoma zesandi ezingaphelelanga, izihloko eziphantsi ezicocekileyo, abaphawuli besiqendu kunye nobugcisa bokuqhoboshela kwifayili enye.

Ayiyo umfanekiso, kuphela ulinde. A MKV 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 MKV iifayile ezimbini zobude obufanayo zingathatha ixesha elihlukileyo eliphawulekayo ukufinyelela kwi-WebP efanayo. MKV yi-codec-agnostic: H.264, HEVC, VP9 ne-AV1 ividiyo ihlala ikhululekile ecaleni kwe-AAC, FLAC, Opus, DTS okanye i-Dolby audio kwifayili enye.

Kuba i MKV ayiyiyo ibhokisi yomkhangeli zincwadi abamele baxhase, kwaye isakhiwo esilawulayo sitshintsha kunokuba siqinisekiswe. Ayitshintshanga nto malunga nokuguqulwa - ifayile ikhowudiwe kwicala lomncedisi, ngoko ke ibhokisi yomkhangeli zincwadi ayivumeli ukuguqulwa ngokuchanekileyo njengenye iyamkela, kwaye akukho bhokisi yekhowudi yendawo ifunekayo ukuyisebenzisa apha. Kufanelekile ukwazi indlela yorhwebo oluqhuba ngayo, nangona: i WebP eyenziweyo ebuyela umva yifomati yonke ibhokisi yomkhangeli zincwadi ibonisa, ngoko ke le ihambisa i clip ukusuka kwinto eweb ayizukuncama into eyenzayo. MKV ayinaso nasiphi na isixhaso sehardware esisemthethweni - iifowuni, iziphene kunye neeTV zihlala zifuna i-VLC okanye i-remux phambi kokuba zidlale.

Ulahleko, nantoni na eyaqala njengevidiyo. I-WebP ephefumlelweyo ingakhowudisa iframes zayo ngayiphi na indlela: indlela engalahlekiyo igcina yonke i-pixel kwaye ilungele imifanekiso ethe tyaba kunye nombhalo wekhusi, ngelixa indlela engalahlekiyo isebenzisa umbono osekelwe kwibloki wohlobo lwe-codec yevidiyo esebenzisayo kwaye ilungele imifanekiso ebonakalayo. Iiframe zekhamera zigcwele i-grain elungileyo kunye ne-gradients apho uxinzelelo olungalahlekiyo lufumananga umzobo, ngoko ke uyilo olungenalahleko lomshicileli orekhodiweyo unokusebenza amaxesha amaninzi ubungakanani be-lossy one ebonakala ngathi ifana. Yishiye ilahlekiyo ngaphandle kokuba umthombo wawungurekhodo lwekhusi lombhalo ocacileyo. I-WebP ihlala ikwinqanaba lesithathu ngaphandle komkhangeli zincwadi — ushicilelo lokuhamba komsebenzi, i-Office edala i-Office edala i-Office kunye nezinye ii-galeri zefowuni aziyi kuxhaswa.

I-animated WebP 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-WebP inikezela zombini iimeko ezilahlekileyo nezingalahlekileyo, ngokubonisa ngokucacileyo kwe-alpha noopopayi abafumanekayo kumnye.

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-MKV yakho ukuba i-target viewer yakho ixhasa loo nto.

Hayi — iifomati eziboniswayo WebP (GIF, WebP, APNG) azigcinanga isandi. Ukuba ufuna isandi neclip yakho, cwangcisa isiqulathi sevidiyo (MP4, WebM, MKV) endaweni ye WebP. 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-WebP ijikeleza kungekho kuphela kwayo (okungagqibekanga), idlala i-N amaxesha, okanye idlala kabini kwaye i stops. Ubalo lwe-loop lugcinwa kwi-WebP 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 MKV 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-MKV yokuqala). Tshintsha isiphelo kwi-WebP ephefumlelweyo ukuqinisekisa umbala opheleleyo.

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