3GP ndi stripped-m'munsi MP4 anamanga kwa mafoni mafoni posachedwapa, kotero owona ndi ochepa koma resolution ndi audio quality ndi zokwanira.
Ntchito Zofala
Mobile video
3G streaming
Phone video
3GP Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu
Kodi ndi 3GP video wapamwamba?
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3GP ndi video chidebe kuti ali ndi imodzi kapena zambiri video ma streams, audio nyimbo, ndi optional subtitles. Zosiyana zidebe kugwirizana codecs zosiyanasiyana, kotero kugwirizana kumadalira onse wrapper ndi zimene zili m'gulu. 3GP owona ndi ochepa ndi decode pa zoipa kwambiri hardware imagwiritsidwa ntchito, amene ndi chifukwa chake foni ndi low-end mafonibe kulemba izo.
Kodi fayilo ya 3GP ndi yofanana ndi MP4 pansipa?
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3GP imapangidwa kuchokera ku katundu wofanana wa ISO Base Media File Format katundu wa MP4 - mchere wa atomu wokhala ndi deta ya media komanso index yomwe ikunena kuti pomwe aliyense wa frame iyamba. Izi ndichifukwa chake kusintha pakati pawo nthawi zambiri ndi rewrap kuposa kubwezeretsa: ma streams amakopedwa mosakhudzana ndipo wosindikiza yekha amasinthidwa, zomwe zimatenga masekondi ngakhale pa fayilo yazaka zambiri. 3GP ndi chonyamula 3GPP standardized kwa mafoni amakono, pamene kanema anayenera kugwirizana ndi 176x144 chophimba ndi 2G deta ndondomeko.
Popeza foni imalemba chilichonse chomwe chimapanga chip chake mu hardware, ndipo 3GP ndi chomwe chimapangidwa ndi silicon. Kamera ya kamera siyifunsa - imalemba mtundu womwe chipangizocho chimatha kupanga panthawi yomaliza yomaliza popanda kuwala. Kusintha pambuyo pake ndi koyenera ndipo sichiwononga chilichonse pamtundu ngati musankha chida chomwe chimasunga ndalama zofanana.
N'chifukwa chiyani msakatuli wanga sadzasewera fayilo ya 3GP?
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Masamba osaka amapereka decoders kwa mndandanda wofupika wa mtundu, ndipo 3GP si pa izo - kuvomereza, mtundu wa codec yomwe imalola, kapena nthawi yake yokha imaletsa. Fayilo si yowonongeka ndipo wosewera wa desktop adzatsegula, koma palibe chomwe mungachite patsambalo kuti mupange msakatuli. Kusintha ku web-native container ndi njira yokha yodalirika yosewera pagulu. 3GP ndi capped pa low resolutions ndi mono mawu-grade audio; upscaling izo sadzabwezeretsa mfundo zimene zinalibe anataya.
Kodi 3GP 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. 3GP ali H.263 kapena MPEG-4 gawo 2 kanema ndi AMR narrowband mawu audio, onse tuned kwa minimal bitrate osati khalidwe.
