MKV → GIF

Ewe, kwaye yindlela ekhawulezayo yokufumana ixesha ofuna. I 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 lokuqala 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 bokuqhobosha kwifayili enye.

Ayiyiyo imifanekiso, kuphela ulinde. A MKV 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 MKV iifayile ezimbini zobude obufanayo zingathatha ixesha elihlukileyo lokufikelela kwi-GIF efanayo. I-MKV ayisebenzisi i-codec: H.264, HEVC, VP9 ne-AV1 ividiyo ihlala ikhululekile ecaleni kwe-AAC, FLAC, Opus, DTS okanye i-Dolby audio kwifayili enye.

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

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 MKV ikhupha i-75% ye-frames; ilungisa nge-frame-rate slider. Eyona, i-palette quantification: i-GIF imiselwe kwimibala emi-256 kunye ne-gradient-heavy MKV dithers ebonakalayo. Tshintsha kwi-WebP ejikelezayo yobuxoki bombala opheleleyo.

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