MPEG → MPG

Ndikugwirizana ndi ma DVD a 4K, ndipo ndi njira yofulumira. MPEG ndi MPG amagawana bokosi lofanana lokhala ndi bokosi, kotero mavidiyo ndi ma audio streams amakopedwa m'ma byte-by-byte ndipo ma container wrapper okha amalembanso. Sichidzatha kusinthidwa ndipo sichidzasinthidwa, kotero fayilo ya feature-length imatha m'maola angapo m'malo mwa maola awiri, ndi mtundu wa output womwe uli ndi mtundu wofanana ndi wopanga. MPEG pano kumatanthauza MPEG-1 kapena MPEG-2 pulogalamu mtsinje, mtundu standardized kwa Video CD ndi kenako kwa DVD ndi kufalitsa TV. MPG ndi chimodzimodzi MPEG pulogalamu mtsinje monga.mpeg - atatu-alemba kuwonjezeka ndi DOS-era kugwa, si mtundu wina.

Ngati chinthu chokhacho cha zida chikufunikira kukwaniritsa zolingazo. Mafomu awiriwa amachokera kunthawi yomweyo ya H.264, kotero palibe kusintha komwe kumagula chitetezo, kudalirika kapena kutsimikizika kwatsogolo - kumagula kugwirizana ndi chipangizo chimodzi chokha. Ngati cholinga ndicho kuteteza zithunzi zogwiritsa ntchito nthawi yayitali, kusintha kwa kontena latsopano, osati kumbuyo. MPEG-2 amafuna pafupifupi 4 mpaka 6 nthawi ya bitrate ya H.264 kwa chithunzi chimodzi, ndipo zinthu zake nthawi zambiri zimaphatikizidwa, zomwe zimawoneka zosapanga dzimbiri pazowonera zamakono. MPG amalandira zonse MPEG-2 kuletsa - heavy bitrate, interlacing, palibe soft subtitle - kuphatikizapo kusokonezeka kwa awiri zowonjezera kwa mtundu wina.

Ndikoyenera - zonse zolemba za audio mu MPEG (kuwunika kwa woyang'anira, mabungwe osiyanasiyana, mawu ofotokoza) amasungidwa mu MPG pamene chikwama chofunikira chimathandizira ma audio ambiri. MKV ndi MOV amayendetsa ma audio osatha; MP4 amathandizira ambiri koma ena osewera a hardware amawona kokha track 1; WebM imatha pa Opus / Vorbis track.

Ma subtitle olimba (ma tracks osankhika) amapulumuka pamene MPG angawagwiritse ntchito: MKV amagwiritsa ntchito SRT, ASS, SSA, PGS, VobSub mwachilengedwe; MP4 amagwiritsa ntchito mov_text (format yosasinthasintha). Kusintha MKV ndi subs a ASS ku MP4 kumawawononga kuti akhale mov_text kapena kuwalemba. Hardsubs (olembana mu kanema) amagwiritsa ntchito ngakhale.

Metadata ya bokosi limasintha pakati pa MPEG ndi MPG pamenepo onse awiri amapereka bokosi la atomu (MKV, MP4, MOV). WebM imasunga bokosi m'ma block ogwirizana ndi Matroska, choncho MKV <-> WebM bokosi limayenda molimba. AVI sichimakhala ndi bokosi la spec, choncho kusintha kwa AVI ku MPG kumabweretsa fayilo yosasinthika ngati simuwonjezera ma markers m'manja.

MKV ndi yokha mainstream yokhala ndi ma fayilo ophatikizidwa (TTF fonts for ASS subs, JPG cover art, fan-translated PDF inserts). Kuchokera ku MPEG kupita ku MPG kumachotsa ma attachments pamene MPG si MKV - ma streams elementary amasinthidwa, koma payload ophatikizidwa amakhala m'malo ochokera. Tengani MPEG ngati chitetezo ngati mumatengera ma fonts ophatikizidwa.

Kodiyi ya default imasankhidwa kuti igwirizane ndi MPG yokhala ndi katundu: MKV imasinthidwa kukhala H.265 (HEVC) kuti ikhale yolimba kwambiri; MP4 imasinthidwa kukhala H.264 kuti ikhale yolimba kwambiri; WebM imasinthidwa kukhala VP9; AVI imagwiritsa ntchito MPEG-4 ASP (DivX / Xvid linage). MPG ndi kuwonjezeka DVD authoring mapulogalamu, older camcorders ndi kufalitsa ingest zipangizo kuzindikira, kotero kuti imakhala zothandiza kwa iwo ma pipelines.

HDR static metadata (HDR10 mastering display values, max content light level) imatha kupita ku MPG pamene ma kontena awiri ndi codec osankhidwa amathandizira (HEVC, AV1 mu MKV / MP4). Dolby Vision ndi wolimba kwambiri - DV profile 5 / 7 / 8.1 mu MPEG nthawi zambiri amapulumuka okha ku MKV ndi HEVC; kusinthidwa ku MPG kontena lomwe silitha kunyamula gawo la DV limatha ku HDR10.

MKV ndi WebM amalemba ma timestamps a real-frame ndi kuwongolera VFR mwanjira yachibadwa, kotero kuti MPEG VFR imatha kukhala ndi MPG ya mafomuwa popanda kubwezeretsa. MP4 imasunga nthawi yowonjezerapo koma ena osewera amaganiza kuti CFR; wosintha amatulutsa "kulepheretsa CFR" kuti abwezeretse VFR MPEG ku 24 / 30 / 60 fps MPG kwa zolinga zosatheka.

Remux ya codec yomweyo imatulutsa kukula kwakukulu (kuphatikiza kwa kontena kumasiyana ndi 0.1-2%). Kusintha kwa codec kungapangitse kukula kwa 50% kapena kuposa: H.264 kupita ku H.265 kumatha kuchepetsa fayilo pazomwe zimawoneka bwino; H.264 kupita ku AV1 kumatha kuchepetsanso panthawi ya slow.Kuchokera ku high-bitrate MPEG (Blu-ray rip) kupita ku low-bitrate MPG (kutsitsa pa intaneti) ndichifukwa chofala kwambiri cha kugwa kwakukulu.

Ndiyo mpaka 8K (7680x4320) pa Premium. Mlingo wopanda malire umatha 4K (3840x2160) mpaka kumapeto kwa fayilo ya 1 GB. Ma remuxes oyera (kupita kwa codec yofanana) ya MPEG yokulirapo kupita ku MPG amalepheretsa I / O ya diski, osati CPU - 30 GB MPEG amasinthanso kupita ku MPG m'miphindi yochepa popanda kuyankhulana. Amasinthanso kukula ndi kuchuluka kwa ma pixel.