Chimodzi mwazofunikira zomwe muyenera kudziwa ndi "Frame Rate" kuti muphunzire njira yopangira makanema.Asanalankhule za chimango mlingo, choyamba tiyenera kumvetsa mfundo makanema ojambula pamanja (kanema) ulaliki.Makanema omwe timawonera amapangidwa ndi zithunzi zosasintha.Popeza kusiyana pakati pa chithunzi chilichonse chokhazikika kumakhala kochepa kwambiri, zithunzizo zikawonedwa pa liwiro linalake, zithunzi zong'ambika mofulumira zimapereka mawonekedwe pa retina ya diso la munthu zomwe zimabweretsa kanema yomwe timawonera.Ndipo chilichonse mwazithunzizo chimatchedwa "frame".
"Frame Per Sekondi" kapena otchedwa "fps" amatanthauza kuti ndi angati omwe amajambula mafelemu muvidiyo iliyonse.Mwachitsanzo, 60fps ikutanthauza kuti ili ndi mafelemu 60 a zithunzi zokhazikika pamphindikati.Malinga ndi kafukufukuyu, mawonekedwe amunthu amatha kupanga zithunzi 10 mpaka 12 pamphindikati, pomwe mafelemu ochulukirapo pamphindikati amawonedwa ngati kuyenda.Mafelemu akakhala okwera kuposa 60fps, zimakhala zovuta kuti mawonekedwe amunthu azindikire kusiyana pang'ono kwa chithunzi choyenda.Masiku ano, mafilimu ambiri amapangidwa ndi 24fps.
Kodi NTSC System ndi PAL System ndi chiyani?
TV ikabwera padziko lapansi, kanema wawayilesi adasinthanso mawonekedwe amtundu wamavidiyo.Popeza chowunikira chikuwonetsa zithunzi ndi kuyatsa, kuchuluka kwa chimango pamphindikati kumatanthauzidwa ndi zithunzi zingati zomwe zingasinthidwe mkati mwa sekondi imodzi.Pali njira ziwiri zojambulira zithunzi-"Kusanthula Mwachidwi" ndi "Kusanthula Kwapakati".
Kusanthula kwapang'onopang'ono kumatchedwanso kusanja kosalekeza, ndipo ndi njira yowonetsera momwe mizere yonse ya chimango chilichonse imajambulidwa motsatana.Kugwiritsa ntchito kusanthula kwa interlaced chifukwa cha kuchepa kwa bandwidth ya siginecha.Kanema wolumikizidwa akugwiritsa ntchito machitidwe akanema akanema a analogi.Iyenera kuyang'ana mizere yosawerengeka ya gawo lazithunzi kaye ndiyeno mizere yowerengeka ya gawo lazithunzi.Mwakusintha mwachangu zithunzi ziwiri za "hafu-frame" zimawoneka ngati chithunzi chathunthu.
Malinga ndi chiphunzitso chomwe chili pamwambapa, "p" amatanthauza Kusanthula Kwambiri, ndipo "i" imayimira Interlaced Scanning."1080p 30" ikutanthauza Full HD resolution (1920 × 1080), yomwe imapangidwa ndi 30 "full frames" pang'onopang'ono sekondi iliyonse.Ndipo "1080i 60" ikutanthauza kuti chithunzi cha Full HD chimapangidwa ndi 60 "half-frames" yolumikizidwa pamphindikati.
Pofuna kupewa kusokonezedwa ndi phokoso lopangidwa ndi ma sigino apano ndi a pa TV pa ma frequency osiyanasiyana, National Television System Committee (NTSC) ku USA yapanga ma interlaced scanning frequency kukhala 60Hz, omwe ndi ofanana ndi ma frequency alternating current (AC).Umu ndi momwe mitengo ya 30fps ndi 60fps imapangidwira.Dongosolo la NTSC limagwira ntchito ku USA ndi Canada, Japan, Korea, Philippines, ndi Taiwan.
Ngati musamala, kodi mumawona zida zina zamakanema kuti 29.97 ndi 59.94 fps pazambiri?Manambala osamvetseka ndi chifukwa chakuti TV yamtundu itapangidwa, chizindikiro chamtundu chinawonjezeredwa ku chizindikiro cha kanema.Komabe, mafupipafupi amtundu wamtundu amaphatikizana ndi ma audio.Pofuna kupewa kusokoneza pakati pa makanema ndi ma audio, mainjiniya aku America otsika 0.1% ya 30fps.Chifukwa chake, mawonekedwe amtundu wa TV adasinthidwa kuchokera ku 30fps kupita ku 29.97fps, ndipo 60fps idasinthidwa kukhala 59.94fps.
Poyerekeza ndi dongosolo la NTSC, wopanga TV waku Germany Telefunken wapanga dongosolo la PAL.Dongosolo la PAL limatenga 25fps ndi 50fps chifukwa ma frequency a AC ndi 50 Hertz (Hz).Ndipo maiko ambiri aku Europe (kupatula France), maiko aku Middle East, ndi China amagwiritsa ntchito dongosolo la PAL.
Masiku ano, makampani owulutsa akugwiritsa ntchito 25fps (PAL system) ndi 30fps (NTSC system) ngati chiwongolero chopanga makanema.Popeza mafupipafupi a mphamvu ya AC amasiyana ndi dera ndi dziko, choncho onetsetsani kuti mwakhazikitsa dongosolo loyenera loyenera musanajambule kanema.Kuwombera kanema ndi dongosolo lolakwika, mwachitsanzo, ngati muwombera kanema ndi PAL dongosolo chimango mlingo ku North America, mudzapeza kuti chithunzi kuthwanima.
The Shutter ndi Frame Rate
Mtengo wa chimango umagwirizana kwambiri ndi liwiro la shutter."Shutter Speed" iyenera kuwirikiza kawiri Frame Rate, zomwe zimapangitsa kuti anthu aziwoneka bwino kwambiri.Mwachitsanzo, kanemayo akamagwiritsa ntchito 30fps, zikuwonetsa kuti liwiro la shutter la kamera limayikidwa pa masekondi 1/60.Ngati kamera imatha kuwombera pa 60fps, liwiro la shutter la kamera liyenera kukhala 1/125 sekondi.
Liwiro la shutter likakhala lochedwa kwambiri pamlingo wa chimango, mwachitsanzo, ngati liwiro la shutter liyikidwa pa 1/10 sekondi kuwombera kanema wa 30fps, wowonera adzawona kuyenda kosawoneka bwino muvidiyoyo.M'malo mwake, ngati liwiro la shutter liri lokwera kwambiri kuti lifike pamlingo wa chimango, mwachitsanzo, ngati liwiro la shutter liyikidwa pa 1/120 sekondi kuwombera kanema wa 30fps, kuyenda kwa zinthu kudzawoneka ngati maloboti ngati kuti adajambulidwa poyimitsa. kuyenda.
Momwe Mungagwiritsire Ntchito Mafelemu Oyenera
Mawonekedwe a vidiyo amakhudza kwambiri momwe kanemayo amawonekera, zomwe zimatsimikizira momwe kanemayo amawonekera.Ngati phunziro la kupanga mavidiyo ndilokhazikika, monga pulogalamu ya semina, kujambula nkhani, ndi msonkhano wamavidiyo, ndizokwanira kuwombera kanema ndi 30fps.Kanema wa 30fps akuwonetsa kusuntha kwachilengedwe ngati mawonekedwe amunthu.
Ngati mukufuna kuti kanemayo akhale ndi chithunzi chomveka bwino pamene akusewera pang'onopang'ono, mukhoza kuwombera kanema ndi 60fps.Akatswiri ambiri ojambula mavidiyo amagwiritsa ntchito chiwongolero chapamwamba kuwombera kanema ndikugwiritsanso ntchito ma fps otsika popanga pambuyo pake kuti apange kanema woyenda pang'onopang'ono.Ntchito yomwe ili pamwambayi ndi imodzi mwa njira zodziwika bwino zopangira chikondi chokongoletsedwa ndi kanema woyenda pang'onopang'ono.
Ngati mukufuna kuyimitsa zinthuzo mothamanga kwambiri, muyenera kuwombera kanema ndi 120fps.Tengani kanema "Billy Lynn Pakatikati" mwachitsanzo.Kanemayo adajambulidwa ndi 4K 120fps.Kanema wapamwamba kwambiri atha kufotokoza momveka bwino tsatanetsatane wa zithunzi, monga fumbi ndi kuphulika kwa zinyalala pamfuti, ndi moto wamoto, zomwe zimapatsa omvera malingaliro owoneka bwino ngati kuti ali pamalopo.
Pomaliza, tikufuna kukumbutsa owerenga kuti agwiritse ntchito mawonekedwe omwewo kuti ajambule makanema mu polojekiti yomweyi.Gulu laukadaulo liyenera kuyang'ana kuti kamera iliyonse imagwiritsa ntchito chiwongolero chofananira pomwe ikugwira ntchito ya EFP.Ngati Kamera A ikugwira 30fps, koma Kamera B ikugwira ntchito 60fps, ndiye kuti omvera anzeru adzawona kuti kanemayo sikuyenda bwino.
Nthawi yotumiza: Apr-22-2022