M4V → MKV

Zviri pachena kuti DRM. Zvimwe M4V mafaera anovharwa pabitstream level nekutengesa kana software iyo yakaburitsa iwo, uye yakavharwa mvura haigone kugadziriswa nedu kana nechinhu chero chipi zvacho pasina chiratidzo chelicensing. Mafaira aunenge wanyora, wakatumira kunze kana wakarodha pasi zvisingadzivirirwe zvinoshandura zvakajairika; chibvumirano chekutenga chisiri, uye hapana mushanduri anogona kuvimbisa zvakasiyana. DRM-inodzivirira M4V kutengesa haasi kuchinjaniswa nechimwe chinhu; chete unprotected M4V mafaera vari convertible, uye kwete-Apple vatambi kazhinji vanofanira kuchinja zita rezvirongwa.

Zvinogona kunge zvisina. M4V inodzokororwa neyakazvimirira silicon pafoni, matablets uye TVs, izvo zvinoita kuti iite pasina kusvibisa bhatiri. MKV zvinonyanya kudzokera kusoftware decoding pane iyo imwechete hardware - yakakwira CPU kumanikidza, yakakwira-yakakwira chigadzirwa, uye yakaderera-yakaderera maframes pa4K zvinhu. MKV ane anenge hapana native hardware rutsigiro - mafoni, browsers uye TVs zvinoda VLC kana remux pamberi vachava kutamba.

Kuchengeta chero mazita anofananidza uko faira iri kuenda, nekuti hapana chinhu chinonakidza. Mumwe wezviviri izvi zvakagadzirwa kuti zvifananidze kutamba uye chimwe chezviviri izvi chinonakidza kuti chitore zvese izvo faira inogona kusanganisira, uye ivo vanotengesa mumwe nemumwe zvakananga pamusoro pechiso. Iyo pragmatic mhinduro yemabhuku akawanda ndeyekuchengeta mubhokisi rakapfuma muzvimiro uye kutumira kune imwe inowirirana pazvinoda. M4V inoita kuti nyaya irambe ichiratidza zviratidzo, mavara uye zvinyorwa zvemazita mumhando yeApple TV app inotarisira, iyo MP4 inowanzo shaya. MKV ndiro archiving chigaro chekusarudza nekuti inochengeta unlimited audio matracks, soft subtitles, chapter mapepa uye kuvhura hunyanzvi muimwe faira.

Yeah — chero audio track mu M4V (munyori wemashoko, dzimwe rurimi, descriptive audio) inochengetwa mu MKV kana chinangwa chemudziyo chinotsigira multi-stream audio. MKV neMOV zvinodzora maaudio tracks asina muganho; MP4 inotsigira akawanda asi mamwe mahardware maplayers anoona chete track 1; WebM inorambidzwa kune imwe Opus / Vorbis track. MKV ndiyo Matroska, yakavhurika chigaro chakagadzirwa muna 2002 pasina kubvumidzwa kwekurambidzwa uye pasina chigaro pane zvaigona kuchengeta.

Soft subtitle (zvinhu zvinosarudzwa) zvinorarama kana MKV zvichigona kutakura iwo: MKV ine SRT, ASS, SSA, PGS, VobSub zvakananga; MP4 ine mov_text chete (yakavharwa fomati). Kushandura MKV ine ASS subs kune MP4 kunoita kuti zvive mov_text kana kuisa iwo. Hardsubs (yakavharwa muvhidhiyo) inoramba ichienda.

Chitsauko che metadata chinoshandura pakati pe M4V ne MKV kana zvese zviwanikwa zvichitsigira chitsauko che atom (MKV, MP4, MOV). WebM inochengeta chitsauko muMatroska-inowirirana block, saka MKV <-> WebM chitsauko chinofamba-famba zvakanaka. AVI haina chitsauko che spec, saka kushandura AVI kuenda ku MKV kunogadzira faira risina chitsauko kana iwe usingawedzera mamarkers nemwoyo wako.

MKV ndiyo chete mainstream container iyo inochengeta zvakananga zvakaiswa mafaera (TTF fonts ye ASS subs, JPG cover art, fan-translated PDF inserts). Kubva ku M4V kuenda ku MKV kunobvisa izvi zvakaiswa kana MKV hachisi MKV — elementary streams inoshandura, asi zvakaiswa payload zvinogara munzvimbo yekubva. Tenga M4V se backup kana iwe uchida kuvimba nezvinyorwa zvakaiswa.

Default codec inosarudza kusangana neMKV container zvakachengeteka: MKV defaults kune H.265 (HEVC) kune yakanakisa kumanikidza; MP4 defaults kune H.264 kune yakakura kwazvo chikuva rutsigiro; WebM defaults kune VP9; AVI inoshandisa MPEG-4 ASP (DivX / Xvid lineage). Kubvisa kuburikidza neyakakwira codec dropdown — AV1 iripo ye MKV / WebM uko iwe uchida kumanikidza kwepamusoro uye unogona kumirira nekunyora.

HDR static metadata (HDR10 mastering kuratidzwa mitengo, max content light level) inoenda kusvika ku MKV kana zvese zvidimbu uye yakasarudzwa codec ichiita (HEVC, AV1 mu MKV / MP4). Dolby Vision isiri nyore - DV profile 5 / 7 / 8.1 mu M4V inoramba ichirarama chete mu MKV neHEVC; kushandura kune MKV chidimbu chisina kutakura DV layer inoparadza HDR10.

MKV neWebM anonyora mazita enguva enguva uye anodzora VFR zvakananga, saka M4V VFR inorarama mu MKV eaya mafomati pasina kudzokorora. MP4 inochengeta mazita enguvawo asi vamwe vatambi vanofunga CFR; mushanduri unopa "force CFR" toggle iyo inodzokorora VFR M4V kusvika 24 / 30 / 60 fps MKV kune zvinonetsa zvinangwa.

Same-codec remux inogadzira saizi yakaenzana (container overhead inoenderana ne0.1-2%). Kuchinja kwecodec kunogona kuchinja saizi ne50% kana kupfuura: H.264 kuenda kuH.265 zvinotora hafu yefaera nemhando imwecheteyo yekuona; H.264 kuenda kuAV1 inotora hafu yefaerazve paslow preset.Kubva pa high-bitrate M4V (Blu-ray rip) kuenda pa low-bitrate MKV (web upload) ndiyo yakanyanya kuitika chikonzero chekukwira kwakanyanya.