MPG Amathuluzi

Tshintsha MPG kuya futhi kusuka kumafomethi ahlukahlukene

Mayelana MPG

MPG iyividiyo efanayo ye-MPEG-1 noma i-MPEG-2 njenge-.mpeg, kuphela isibonisi esincane sesoftware yesikhathi se-DOS esidingekayo.

Ukusetshenziswa Okuvamile

Video distribution
Broadcast media
DVD video

MPG Ukushintsha

Yini ihele MPG?

MPG (MPEG) is a family of standards for coding audio-visual information.

Yini i-MPEG program stream, nokuthi kungani ifayela lami liyi-one?

I-multiplex eyenziwe ukuba i-decode yi-hardware esebenza ngokuqinile ngesikhathi sangempela, ayikwazi ukuhlela kwikhompyutha. Ama-packets omsindo nevidiyo axhunywe nge-time markers ukuze ibhokisi eliset-top likwazi ukuqala ukudlala kusuka kuwo wonke ama-stream, ngaphandle kwe-index futhi ngaphandle kokucindezela ihele lonke. Lo mkhiqizo uyini isizathu sokuthi MPG iqukethe ukudlala ku-hardware edala ngokugcwele futhi ikhohlisa ama-software amanje ngokuvamile. Okuqukethwe yi-MPEG-1 noma i-MPEG-2 video ne-MP2 umsindo; ukuxhuma kanye nesakhiwo se-GOP kufana nehele le-.mpeg.

Kungani isofthiwe yokusakaza neyokubhala i insists ku MPG?

Ngenxa yokuthi i-chain yonke yakhiwa kuyo. Amaseva okudlala, amathuluzi we-DVD okubhala kanye nezinhlelo zokungenisa zicacisiwe ngalesi sifomethi lapho kukhona, futhi imishini eneminyaka emihlanu yokuphila kwenkonzo ayikwazi ukucaciswa kabusha. Amafayela aphuma kulezi zinhlelo yifomethi i-system ikhishwe ukukhishwa, hhayi ukhetho oluwenziwe ngumuntu odlule. MPG yisibonisi sesoftware ye-DVD, ama-camcorders adala kanye nezixhobo zokusakaza ziyazi, ngakho ihlala isetshenziswa ezipayipini.

Ingabe MPG ifana nefomethi njengenye ingqikithi yayo?

Yebo. Lezi zibanzi kanye negama elide noma elincane okubona ngakwesokudla lichaza uhlobo oluthile olungaphansi, futhi noma yini efunda noma ifunda zombili. Izibizo ezimbili ziyimlando: i-8-character filename limit from the DOS era, a vendor naming of its application rather than its file format, or two programs that simply defaulted differently. Converting either produces the same result, so use whatever extension the software at the other end is expecting.

Kungani isiphequluli sami singadlala ihele MPG?

Amabhuleki athumela ama-decoders kuluhlu oluncane lwefomethi, futhi MPG 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. MPG ithola wonke ama MPEG-2 amaphutha - i-bitrate enzima, ukuxhuma, akukho ngezansi okuthambile - kanye nokungqubuzana kwezinhlamvu ezimbili ezibanzi zefomethi eyodwa.

Kungani i-MPG yami ibonisa ama-comb lines nganoma yini ehambayo?

Ngenxa yokuthi i-interlaced. Izinto ezingaphakathi kulolu hlobo zivela emidlalweni ye-DVD, lapho ifreyimu ngayinye igcinwa njengezindawo ezimbili ezingu-half-height ezithathwe ngengxenye engu-50 yesikhathi esisodwa. Isikrini esiqhubekayo sibonisa zombili ngasikhathi sinye, ngakho-ke ukuhamba phakathi kwezimo ezimbili kubukeka sengathi kuzoba kuphindwe kabili. Ukususa i-interlacing kushintsho kuveza izimo zibe amafreyimu aphelele futhi i-artefact iphela kahle. MPG iyi-MPEG i-program stream efanayo ne-.mpeg — isibonisi sokubhala esithathu siyi-DOS-era truncation, hhayi i-format ehlukile.

Ingabe MPG izodlala kufoni noma TV ngaphandle kokushaya ibhayisikili?

Ngokuvamile, yebo, ngoba ama-chips efonini, ama-tablets nama-televisions afaka ikhophi le-payload e-silicon ekhethekile, hhayi kwi-processor eyinhloko. Lokhu kuyinto ehlukile phakathi kwevidiyo edlala i-cool ngehora elilodwa nelinye elifaka i-heat device futhi liyihlanze imizuzu emashumi amane. lapho ifomu lihla khona, i-app ixhasa i-app, hhayi uku-decode — i-codec iyilungile, i-wrapper yilokho i-gallery app ingakanani.

Ingabe kufanele ngigcine amafayela amasha njenge MPG?

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 MPG?

Ngakwesokudla, noma ngaphakathi kwesithombe. MPG 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 esingezansi esihleliwe futhi esishintshayo kodwa ihamba njengefayela lesithathu elilula ukulahleka; ukushaya ngaphakathi kuqhubeka noma yikuphi ukudluliswa kodwa akukwazi ukuvalwa ngemuva.

Ingabe kubaluleke ukuthi MPG ingaphezu kweminyaka engu-30?

Ubudala bukhona akuyona inkinga - amafomethi amaningi onyaka akhona alungile, ngokucacile ngoba konke kudlule iminyaka eminingi ukuwafaka. Okubalulekile ukuthi unyaka uthathe isinqumo: amafayela amancane, amaprosesa aphansi, akukho nethiwekhi, futhi amakhono angeke afune umuntu. lapho amanani ahlala khona, ifomu lilungile. lapho ayikho, lena yisizathu sokushintsha.

Ingabe ihele MPG ligcina ama-tracks omsindo amaningi?

Yebo - imixholo yesiNgisi, i-dub ne-comment ingahlala yonke kwifayela elilodwa ne-player eshintsha phakathi kwazo. Izinqumo ezimbili: amafoni amaningi nama-television adlalayo abonisa kuphela umculo wokuqala kodwa amanye akhona, futhi ukuguqulwa kufomethi ngaphandle kosizo olukhulu lwe-tracks agcina umculo owodwa futhi akhuphula okunye. Khetha umculo ofuna ukuwuguqula, hhayi ukucabanga ukuthi iyiphi ehlala.

Ingabe ukusebenzisa MPG kuthatha ilayisense lepatenti?

Akunakho okukudingayo. Ama-codecs ahlobene ahlobene ne-patent pools, futhi ilayisense ibekwe 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 nokushintsha ifayela oline.