VOB (Video Object) ndi chidebe mtundu ntchito DVD kanema. Iwo akhoza muli kanema, zomvetsera, omasulira, ndi minda yazakudya kwa DVD kubwezeretsa.
Ntchito Zofala
DVD video
Movie storage
Disc authoring
VOB Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu
Kodi ndi VOB kanema wapamwamba?
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VOB ndi video chidebe kuti ali ndi imodzi kapena zambiri video ma streams, audio nyimbo, ndi zosankha subtitle. Zosiyana zinyalala kugwirizana zosiyanasiyana codecs, kotero kugwirizana kumadalira onse wrapper ndi zimene zili m'kati mwake. VOB amateteza zonse DVD payload - multiple angles, multiple audio zinenero ndi subtitle nyimbo zonse kupulumuka m'nyumba yake.
Kodi ndi MPEG pulogalamu mtsinje, ndi chifukwa chiyani ndi wanga fayilo imodzi?
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Ndi multiplex yopangidwa kuti ikhale yosinthidwa ndi zida zamagetsi zamagetsi zamagetsi, sizosinthidwa pakompyuta. Mapaketi a audio ndi video amaphatikizidwa ndi ma markers a nthawi kuti set-top box ikhoza kusewera kuchokera kulikonse m'madzi, popanda index ndi popanda kusungira fayilo yonse. Chithunzicho ndichifukwa chake VOB zolemba zimasewera pa zida zakale mosasamala kanthu komanso zimasokoneza mapulogalamu amakono nthawi zonse. A VOB ali MPEG-2 kanema, AC-3 kapena PCM audio, ndi DVD subpicture subtitle masamba, anagawa mu 1 GB segments ndi DVD spec.
Nchifukwa chiyani chilichonse kuchokera pa diski chimatuluka ngati VOB?
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Chifukwa cha mtundu wa diski umafotokoza izi. Video, audio ndi kuyendetsa pa diski yowoneka bwino zinakhazikitsidwa m'malo mwa ntchito yoyenera kuti wosewera wa ntchito yokhazikika akhoza kuchotsa uthengawo popanda pulogalamu iliyonse. Chomwecho chimafika pa diski, chokhala ndi zolinga za nthawiyo - kulumikizana, kulemera kwamphamvu ndi kugawa mafayilo. VOB ndi Video Object wonyamula anapeza mu VIDEO_TS wapamwamba wa aliyense DVD - MPEG-2 pulogalamu mtsinje ndi DVD-osiyana kuyendera deta anawonjezera.
Nchifukwa chiyani msakatuli wanga sadzasewera fayilo ya VOB?
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Mawebusayiti amatumiza decoders kwa mndandanda wocheperako wa mafomu, ndipo VOB siyipatsidwa - lisensi, mtundu wa codec womwe umalola, kapena nthawi yake imatenga. Fayilo siyimawonongeka ndipo wosewera wa desktop adzatsegula, koma palibe chomwe mungachite patsambalo kuti mupange msakatuli. Kusintha kwa webusaitiyi ndi njira yokha yotsimikizika yosewera. VOB ndi kugawidwa pakati pa mafayilo, angagwiritsidwe ntchito CSS-encrypted, ndi kunyamula navigation packets kuti kukhumudwitsa cholinga chazikulu osewera.
Nchifukwa chiyani mavidiyo anga a VOB amasonyeza makompyuta a comb pa chilichonse chomwe chimayenda?
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Chifukwa chake ndi interlaced. Zolemba mu mtunduwu nthawi zambiri zimachokera ku broadcast ndi DVD era, komwe chilichonse chimasunga ngati madera awiri a half-height omwe amatenga gawo la 50 la theka la mphindi. Progressive screen ikuwonetsa zonse ziwiri pamodzi, kotero kuyendetsa pakati pa ma exposition awiri amawoneka ngati kukongoletsa kwa horizontal. Deinterlacing pa kusintha kumapanga madera kukhala ma frame onse ndipo artefact imatha kutuluka bwinobwino.
Kutalika kwa mtundu wamtundu, si vuto la wolemba. VOB ili ndi malire ogwira ntchito a fayilo imodzi yomwe imayenda mozungulira kapena yotsika mtengo, kotero pulogalamu yojambula imagawa kujambula komwe kumatha kutulutsa fayilo yomwe siyingathe kuindex. Kusintha kwa kontena popanda malire amatilola kuti tigwirizanenso ndi kanema wopitilira, zomwe nthawi zambiri ndizofunikira kwambiri kuti anthu azisintha mtunduwu.
Kodi VOB idzasewera pafoni kapena TV popanda kutulutsa batri?
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Nthawi zambiri ndi choncho, chifukwa ma chips mu mafoni, ma tablet ndi ma televisions amachotsa ma code a ma payloads amtunduwu m’ma silicon osankhidwa osati pa main processor. Izi ndi zosiyana pakati pa kanema womwe umasewera bwino kwa maola awiri ndi wina amene umatentha chipangizocho ndipo umachisiya m’maola asanu ndi awiri. Pamene mtunduwo umagwa pansi ndi kuthandizira kwa app kuposa kuchotsa ma code – codec ndi bwino, wrapper ndi zomwe gallery app ingakane.
