3GP Amathuluzi

Guqula 3GP kuya futhi kusuka kumafomethi ahlukahlukene

Mayelana 3GP

I-3GP iyi-MP4 encane eyenziwe ngezifiso esetshenziswa kumanethiwekhi eselula, ngakho amafayela ancane kodwa ukunemba nokunethezeka kwesandi kuncane.

Ukusetshenziswa Okuvamile

Mobile video
3G streaming
Phone video

3GP Imibuzo Evame Ukubuzwa Yokuguqulwa

Yini ihele 3GP?

3GP is a multimedia container format designed for 3G mobile phones.

Ingabe ihele 3GP lifana ne MP4 ngaphansi?

Isakhiwo sabo sifana kakhulu. 3GP ikhiwa kusuka ku-ISO Base Media File Format box layout isebenzisa i-MP4 — umhlahlandlela we-atoms ogcina idatha yemidiya kanye ne-index ekhuluma lapho ifreyimu ngayinye iqala khona. Lokhu kusho ukuthi ukushintsha phakathi kwabo kuvame ukuba yi-rewrap ngaphezu kokuphinda-code: ama-streams akopiwe ngaphandle kokuchofoza futhi i-wrapper kuphela ibhalwe kabusha, okuthatha amasekondi ngisho kwifayela le-feature-length. I-3GP iyibhokisi le-3GPP elijwayelekile lefoni ephathekayo, lapho ividiyo idinga ukuhambisana ne-176x144 screen ne-2G data plan.

Kungani ifoni yami igcina konke njenge 3GP?

Ngenxa yokuthi i-handset ikhonjiswa kunoma yini i-chip yayo eyenza kwi-hardware, futhi 3GP yilokho okuhlelwe i-silicon. Ikhamera i-app ayibuzanga — ibhala ifomu elisetshenziswa lingakhiqiza ngaphandle kokulahleka noma ukufudumeza, okungaba yifomethi edinga ukukhishwa noma yini. Ukushintsha ngemuva kujwayelekile futhi akudingi lutho kukhwalithi uma okuhloswe ngalo kugcina i-payload efanayo.

Kungani isiphequluli sami singadlala ihele 3GP?

Amabhuleki athumela ama-decoders kuluhlu oluncane lwefomethi, futhi 3GP ayikho kulo — ilayisense, i-codec ehlukene evumela, noma nje ubudala bayo bugcina bungaphandle. Ihele alilahlekile futhi umdlali wedesktop uzovula, kodwa akukho okwenziwayo kukhasi kuzokwenza ibhuleki liyibonise. Ukushintsha ukuguqula kube nendawo yokugcinwa ye-web-native kuyindlela ethembekile kuphela yokudlala ngaphakathi. I-3GP iphele ngesinqumo esiphansi kanye nomsindo we-mono-speech-grade; ukuphakama kwayo ngeke kubuyisele imingwane engazange ithathwe.

Ingabe 3GP izodlala kufoni noma TV ngaphandle kokushaya ibhayisikili?

Ngokuvamile, yebo, ngoba ama-chips efonini, ama-tablets nama-television afaka ikhophi le-payload e-silicon ekhethekile, hhayi kwi-processor eyinhloko. Lokhu kuyinkinga phakathi kwevidiyo edlala i-cool ngehora elilodwa nelinye elifaka ikhofi ledivayisi futhi liyihlanze imizuzu eyisithupha. lapho ifomu lihla khona, i-app ixhasa i-app, hhayi uku-decode — i-codec iyilungile, i-wrapper yilokho i-gallery app ingakanani. 3GP igcina H.263 noma MPEG-4 Ingxenye 2 ividiyo nge AMR narrowband ukukhuluma umsindo, zonke tuned for minimal bitrate hhayi quality.

Ingabe kufanele ngigcine amafayela amasha njenge 3GP?

Uma nje kukhona okuthile okudingayo. Ifomethi ivuliwe, futhi akukho sidingo sokushintsha ingobo yomlando ongeke ukwenze kube nzima, kodwa akuyona indawo lapho ithuluzi noma umphumela uhamba khona. Kunoma yini entsha, ifomethi yamanje ayidingi lutho olungeziwe futhi ivimbela ukulandelana kwesifundo seminyaka emincane kusukela manje.

Ingabe izihloko ezingezansi zihamba lapho kuhele 3GP?

Ngakwesokudla, noma ngaphakathi kwesithombe. 3GP ayinaso isingeniso sesihloko sesihloko, ngakho izinketho ezimbili yi-sidecar.srt ifayela umdlali efaka ngakwesokudla kwevidiyo, noma ukushaya umbhalo emafreyimu ngesikhathi sokucindezela kabusha. I-sidecar igcina isingeniso sesihloko esihleliwe futhi esishintshayo kodwa ihamba njengefayela lesithathu elilula ukulahleka; ukushaya ngaphakathi kuqhubeka noma yikuphi ukudluliswa kodwa akukwazi ukuvalwa ngemuva.

Kungani i-audio track eyodwa kuphela ehlala e 3GP yami?

Ngenxa yokuthi lokhu konke ifomu liyithatha ngokunethezeka. Izinhlamvu zomsindo ezingeziwe zingabhalwa ku 3GP, kodwa ukuxhaswa kokudlala ngemuva kokuqala akulingani kahle kakhulu ukuthi amathuluzi amaningi agcina kuphela elinye futhi asuse ezinye. Uma umsuka unesihloko noma ulwimi lwesibili, khipha lezi ukuze uhlukanise amafayela omsindo ngaphandle kokuthembela kuwo kubhokisi elifihlayo.

Ingabe ukusebenzisa 3GP kuthatha ilayisense lepatenti?

Akunakho okukudingayo. Ama-codecs ahlobene ahlobene ne-patent pools, futhi ilayisense libekwe ngabantu abathumela ama-decoders — ifoni, i-browser, i-operating system — isikhathi eside ngaphambi kokuba ihele lifike kuwe. Lokhu kusho ukuthi ifomu likhona kuwo wonke amahardware futhi kungani ama-royalty-free alternatives akhona, futhi ashintshanga noma yini mayelana nokushintshana kwefayela oline.

Ingabe umsindo ku 3GP uphele esigabeni se-stereo?

Kuzokwenziwa, yebo. Ifomethi yacaciswa ngasinye noma izixhumanisi ezimbili, ngakho-ke umxhuzulane obhekene nawo kufanele uhlukaniswe ngezansi ku-stereo ukuze ulungele — okulungile kuma-headphones nama-speakers wefoni futhi kulungile kunoma yini ehambayo e-home cinema receiver. Uma umsuka une-multichannel mix efanele ukugcinwa, guqula ube yibhokisi eliphatha le nto ngaphandle kokushiya i-downmix ikwenzeke ngokuzimela.

Ingabe ngingenza ngiphinde ngibize isiqephu endaweni yokushintsha 3GP?

Kunzima kakhulu, futhi kufanelekile ukuqonda ukuthi kungani: isithonjana siyisihloko, ngenkathi ama-bytes ngaphakathi kufakwe ngefomethi eyodwa ekhethekile. Ukushintsha igama kwenza ihele igama lakhe lithembisa okuthile okuqukethwe kwayo akusho ukunikela, futhi noma yini evula ihele noma liyiphoqa noma liyifunda kabi. Ukuphela kwephutha elincane yifomethi ezimbili ezikhona ngokusemthethweni ibhokisi elifanayo ngaphansi kwezinhlamvu ezahlukene — futhi ngisho lapho ukuphinda ubhale kahle kuphephile kunalokho ukushintsha igama.

Ingabe ngiguqula isibaya esigcwele se 3GP amafayela ngasikhathi sinye?

Nge-akhawunti, yebo — khiphana ndawonye futhi zibekwe njengemisebenzi eyodwa endaweni yokuphathwa ngayinye ngasikhathi sinye, ngezinhlelo ezifanayo ezisetshenziswa ngaphesheya kweqembu futhi izimpendulo zibuyiselwe ndawonye. Ukuguquka okumahhala kusebenza ihele elilodwa ngasikhathi sinye (amathuluzi okuxhuma athatha amabini); i-plan ekhokhelwa yilokho okuvulela ukuqhubekela phambili kweqembu kanye nobukhulu bomgwaqo wefayela ngalinye, okukwenza ukuguquka kwehele lonke le-archive kube lula.