MKV → GIF

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-GIF 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 GIF 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.

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-MKV 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 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 GIF bube ngaphantsi kakhulu. I-480p GIF eyenziwe kwi-4K MKV incinci nge-16x kwidiski kune-4K GIF. Ukutywina kuphathwa kwi /trim/ okanye /crop/ inkqubo yokuhamba yenyathelo ehlukileyo phambi kokuguqulwa.