MPG → MPEG

Yebo, futhi yindlela esheshayo. MPG ne MPEG zihlanganisa isakhiwo sebhokisi esifanayo esingaphansi, ngakho ividiyo nesandi sokushayela zikopiwe nge-byte-by-byte futhi isiqoqi sokushayela kuphela sibhale kabusha. Akukho okuqokwa futhi akukho okucindezelwa, ngakho ihele lezici ezide liqedwa ngaphansi kwemizuzu endaweni yehora elilodwa, nekhwalithi yesabelo esifanayo nesomthombo. MPG iyi-MPEG i-program stream efanayo ne-.mpeg — isibonisi sokubhala esithathu siyi-DOS-era truncation, hhayi i-format ehlukile. I-MPEG lapha ibhekisa ku-MPEG-1 noma MPEG-2 izinhlelo ezihambayo, ifomu elijwayelekile le-Video CD bese le-DVD ne-broadcast television.

Uma nje ingxenye ekhethekile yemishini idinga isiphetho. Ifomethi zombili zivela kusikhathi esifanayo se-H.264, ngakho noma yikuphi ukushintshana kuthengiswa ukusebenza kahle, ukhwalithi noma ubufakazi bokuphila - kuthengiswa ukuhambisana nedivayisi eyodwa ekhethekile. Uma inhloso ukugcina isithombe esisetshenziswayo isikhathi eside, ukuguqula kwibhokisi elikhona endaweni ye-sideways. MPG ithola wonke ama MPEG-2 amaphutha - i-bitrate enzima, ukuxhuma, akukho ngezansi okuthambile - kanye nokungqubuzana kwezinhlamvu ezimbili ezibanzi zefomethi eyodwa. MPEG-2 idinga cishe izikhathi ezine kuya kwezine ze-bitrate ye-H.264 yesithombe esifanayo, futhi okuqukethwe kwayo kuvame ukuxhuma, okubukeka kubukeka ku-displays amanje.

Yebo — wonke umculo ohambayo ku MPG (umbono womqondisi, izilimi ezihlukile, umculo ochazayo) ugcinwa ku MPEG lapho isiqoqi esizosiza umsindo ohambayo oningi. MKV ne MOV ziphatha umculo ohambayo ongenasiphelo; MP4 isekela abaningi kodwa abanye abadlali behardware babona umculo 1 kuphela; WebM iphele ku-Opus / Vorbis umculo owodwa.

Izihloko ezincane ezilula (izihloko ezikhethiwe) zihlala lapho MPEG zingazithwala: MKV igcina i-SRT, ASS, SSA, PGS, VobSub ngokusemthethweni; MP4 igcina kuphela i-mov_text (ifomethi ephukile). Ukushintsha MKV nge-ASS styled subs ku-MP4 kuzozikhuphula zibe yi-mov_text noma zizicwebezele. Izihloko ezinzima (zicwebezelelwe kwividiyo) zithwale ngaphandle kokungabaza.

Isigaba se-metadata sidlulisa phakathi kuka MPG no MPEG lapho izihlungi zombili zixhasa isiqephu se-atomi (MKV, MP4, MOV). I-WebM igcina iziqephu kwi-Matroska-compatible block, ngakho-ke i-MKV <-> isigaba se-WebM sihamba ngokuhlanzekile. I-AVI ayinasiqephu esicacisiwe, ngakho-ke ukushintsha i-AVI ibe yi-MPEG kwenza ifayela elingahlukanisiwe ngaphandle kokuthi uhlanganise iziphawuli ngesandla.

MKV yindawo yokugcina eyinhloko kuphela egcina amafayela axhunywe ngokuzenzakalela (izifomethi ze-TTF ze-ASS subs, isithombe sokuzivikela se-JPG, izingeniso ze-PDF eziguqulwe nge-fan). Ukusuka ku-MPG kuya ku-MPEG ushiya lezi zifomethi lapho i-MPEG ingakho MKV — ama-streams aphansi aguqulwa, kodwa umthwalo oxhunywe uhlala emsuka. Gcina i-MPG njenge-backup uma uhlala ubheke izifomethi ezixhunywe.

I-codec ejwayelekile ikhethiwe ukufana ne MPEG isitoreji ngokuzithandela: MKV ikhetha i-H.265 (HEVC) ukucindezela okuhle; MP4 ikhetha i-H.264 ukuxhasa isisetshenziswa esibanzi; WebM ikhetha i-VP9; AVI isebenzisa i-MPEG-4 ASP (DivX/Xvid lineage). Nciphisa nge-codec ethuthukisiwe engezansi — AV1 itholakala ku-MKV / WebM lapho ufuna khona ukucindezela okuphezulu futhi ungalindela ukucindezela. I-MPEG izinhlelo zokusakaza ziyi-decoded nganoma iyiphi i-DVD player, set-top box ne-broadcast chain eyenziwe, futhi zithobela amaphutha e-bit ngokunethezeka.

I-HDR metadata ehlala njalo (i-HDR10 mastering display values, max content light level) ihamba phambili ku-MPEG uma izihlungi zombili ne-codec ekhethiwe ziyixhasa (HEVC, AV1 ku-MKV / MP4). I-Dolby Vision inamandla kakhulu — i-DV profile 5 / 7 / 8.1 ku-MPG ihlala kuphela ku-MKV nge-HEVC; ukushintsha ku-MPEG isihlungi esingathwala i-DV layer ihamba phambili ku-HDR10.

MKV ne WebM zirekhoda ama-timestamps we-frame ngayinye futhi ziphatha i-VFR ngokusemthethweni, ngakho-ke i-MPG VFR ihlala i MPEG yalezi fomu ngaphandle kokuphindeka kokuhlolwa. I-MP4 igcina ama-timestamps futhi kodwa abanye abadlali bakholelwa ukuthi i-CFR; umguquli ubonisa "u forza CFR" ukushintsha okuphinda ukuhlolwa kwe-VFR MPG kuya ku-24 / 30 / 60 fps MPEG ngezinhloso ezinomthelela.

I-remux ye-codec efanayo ikhiqiza ubukhulu obufana kakhulu (i-container overhead ihluka ngo-0.1-2%). Ushintsho lwe-codec lungashintsha ubukhulu ngo-50% noma ngaphezulu: H.264 kuya ku-H.265 ngokuvamile kushiya ihele ngaphesheya ngekhwalithi efanayo yokubuka; H.264 kuya ku-AV1 kushiya ihele ngaphesheya futhi ngesinqumo esihamba kancane. Ukusuka ku-high-bitrate MPG (Blu-ray rip) kuya ku-low-bitrate MPEG (ukufaka iwebhu) kuyisizathu esivame kakhulu sokulahlekelwa okuningi.

Yebo kuze kube yi-8K (7680x4320) ku-Premium. Izinga elimahhala liphatha i-4K (3840x2160) kuze kube yi-1 GB yehele. I-pure remuxes (i-codec efanayo edlula) ye MPG enkulu iye ku-MPEG iphele ngokudluliswa kwediski I/O, hhayi i-CPU — i-30 GB MPG ivame ukudluliswa ku-MPEG ngaphansi kwemizuzu ngaphandle kokuqhathaniswa nesinqumo. Iphinde ikhode isilinganiso ngenani le-pixel.