MKV → WebP

Yeah, uye ndiyo nzira yakanakisa yekuwana nguva yaunoda. A MKV inochengeta mapepa ebhuku mubhokisi sezvavanotaura nguva, saka bhuku rinogona kunyorwa kubva ku file uye mu-point inoiswa munguva yekutanga nzvimbo sezviri kuitwa neziso. Dzvanya pane nguva yekuenderera mberi uye chete iyo span inogadziriswa, iyo ndiyo nguva yese ye MKV inoita kuti hapana chinhu chinosiyana nenguva yekutora basa. MKV ndiro archiving chigaro chekusarudza nekuti inochengetera unlimited audio matracks, soft subtitles, chapter mapepa uye kuvhura hunyanzvi muimwe faira.

Hapana vhidhiyo, chete kumirira. A MKV ndeimwe yeMatroska-family container, uye iyo family inoita kuti container ne codec ive zvakasiyana zvachose — izvo faira rine zvakagadziriswa payakanyorwa uye hazvisi zvakajeka nekuwedzera. Mugadziri anodecoder chero chinhu chinowanazve ku framework yakachena, uye iwo framework akafanana neako akaitwa ne codec. Kudecoder mutengo haufananidzi: matsva, anoshanda codecs anotora nguva yakawanda yekuunza kunze kupfuura ekare, saka maviri MKV mafaera ane imwe nguva inogona kutora nguva dzakasiyana kusvika kune imwe WebP. MKV i codec-agnostic: H.264, HEVC, VP9 uye AV1 video kugara zvakanaka pedyo AAC, FLAC, Opus, DTS kana Dolby audio muimwe faira.

Nekudaro, nekuda kwe MKV haisi chidimbu chemudziyo, vaverengi vanofanirwa kutsigira, uye izvo zvinogadzira zvinogadzirisa zvinosiyana kupfuura kuvimbika. Izvi hazvisi kuchinja chero chinhu nezvekushandurwa - faira rinodhawunirodha kubva panzvimbo ye server, saka chidimbu chebrowser chinokanganisa kushandura zvakafanana sechimwe chinogamuchira, uye hapana chikumbiro chekodhi chekugara chinodiwa kuti chiite. Zviri nani kuziva nzira iyo kutengesa kunofamba, kunyangwe: iyo animated WebP iyo inodzokera zvakare ndeye fomati iyo yega yega browser inoburitsa, saka iyi inofambisa clip kubva kune chimwe chinhu chisingazombokuvadza kune chimwe chinhu. MKV ane anenge hapana native hardware rutsigiro - foni, browsers uye TVs zvinoda VLC kana remux pamberi vachava kutamba.

Lossy, kune chero chinhu chakatanga sevhidhiyo. Animated WebP inogona kushandura maframes ayo nenzira ipi neipi: iyo lossless modhi inochengeta yega yega pixel uye inosangana neyakapfava graphic uye skrini yekunyora, asi iyo lossy modhi inoshandisa block-based predicting yerudzi rwe video codec inoshandisa uye inosangana nechokwadi chekutamba. Kamera maframes anosanganisira mavara akaoma uye ma gradients ayo lossless compression haazopedzisira awana chero mufananidzo, saka a lossless animation yefilmed clip inogona kutamba kakawanda kakawanda kupfuura iyo lossy imwe iyo inoonekwa seimwe. Tora iyo lossy kana kuti iyo nzvimbo yaive skrini yekurekodha yemashoko akajeka. WebP ichiri yechidiki kunze kwebrowser — michina yekudhinda, Office yakapfuura uye mamwe mafoni makamera haazoigamuchira.

Animated WebP inoita zvakanaka kune mavhidhiyo akaderera pane 10 masekondi. Kunyangwe faira richibuda (GIF inowanzove neframe-per-frame isina kumanikidzwa). Kune zvinyorwa zvirefu, shandisa WebP kana APNG, izvo zvinoda kumanikidzwa kwevideo-codec-grade uye zvinowedzera zvakanyanya.

Animated GIF: 2 to 8 MB at 480p depending on motion complexity. Animated WebP: 200 KB to 1 MB at the same resolution / quality. Animated WebP is 5 to 10x more efficient than GIF for the same visual quality. WebP inopa mamodheru maviri, ekuputika uye epasi, ane alpha transparency uye animation.

Nekuzvimisikidza tinodzikisa ku 15 fps kune akashongedzwa GIF (anosangana nematambudziko pamusoro pe 25 fps) uye 24 fps kune akashongedzwa WebP / APNG (ayo anosangana nemamiriro ezvinhu akakura). Kuchinja nekushandisa sarudzo yeframe-rate kana muoneri wako achitsigira iyo yekutanga.

Hapana — zvifananidzo zve WebP (GIF, WebP, APNG) hazvina kuchengeta mashoko. Kana uchida mashoko, shandisa video container (MP4, WebM) sezvaungaita nezvifananidzo zvemavhidhiyo.

Yeah - iyo loop-count sarudzo inodzora kana WebP ichiita loops pasina kumbobvira (default), inotamba N nguva, kana inotamba chete kamwe. Iyo loop count inochengetwa mu WebP container metadata uye inozivikanwa neese mamodheru ekuona.

Zvikonzero zviviri zvinozivikanwa. Pakutanga, kuderera kwefremu-rate: 15 fps WebP kubva ku60 fps MKV kunodzikira 75% yefremu; gadzirisa nefremu-rate slider. Pakupedzisira, kuwanda kwepalette: GIF inorambidzwa kune 256 mavara uye gradient-heavy MKV dithers zvakajeka. Tsvaga kune animated WebP yekuvimbika kwese kwese kwevara.

Yeah — resize-resize sarudzo inowedzera MKV pasi pamberi pekubvisa frame, izvo zvinowedzera kuderera kwe WebP faira saizi. A 480p WebP kubva ku4K MKV ndeye 16x yakaderera kupfuura 4K WebP. Usashandisa / video-cutter / kuchera mune imwe nhanho.