Chimwe chezvakakosha iwe chaunofanirwa kuziva ndeye "Frame Rate" kuti udzidze maitiro ekugadzira vhidhiyo.Tisati tataura nezve chiyero chechimiro, isu tinofanira kutanga tanzwisisa musimboti weiyo animation (vhidhiyo) mharidzo.Mavhidhiyo atinoona akaumbwa nemifananidzo yakamira.Sezvo musiyano uripo pakati pechifananidzo chimwe nechimwe chiri mudiki kwazvo, kana iyo mifananidzo ichionekwa pane imwe spidhi, iyo inokurumidza kupenya ichiri mifananidzo inopa kuoneka paziso remunhu izvo zvinoita kuti vhidhiyo yatinoona.Uye imwe neimwe yemifananidzo iyoyo inonzi "frame."
"Fremu Pasekondi" kana inonzi "fps" zvinoreva kuti mangani achiri mafoto mafuremu muvhidhiyo yega yega.Semuenzaniso, 60fps zvinoreva kuti ine 60 mafuremu emifananidzo ichiri pasekondi.Zvinoenderana netsvagiridzo, iyo yekuona system yemunhu inogona kugadzira gumi kusvika gumi neiri mifananidzo pasekondi, nepo mamwe mafuremu pasekondi achionekwa sekufamba.Kana iyo furemu yakakwira kupfuura 60fps, zvakaoma kuti munhu anoona sisitimu ione musiyano mudiki mumufananidzo unofamba.Mazuva ano, kugadzirwa kwemafirimu kwakawanda kunoshanda 24fps.
Chii chinonzi NTSC System uye PAL System?
Kana terevhizheni yauya pasirese, terevhizheni yakachinjawo vhidhiyo furemu reti fomati.Sezvo iyo yekutarisa ichipa mifananidzo nekuvhenekesa, iyo furemu chiyero pasekondi inotsanangurwa nemangani emifananidzo anogona kutariswa mukati mesekondi imwe.Pane nzira mbiri dzekutarisisa mufananidzo- "Kufambira mberi Scanning" uye "Interlaced Scanning."
Progressive scanning inonziwo noninterlaced scanning, uye inzira yekutaridza iyo mitsetse yese yefuremu yega yega inodhirowa ichitevedzana.Iko kushandiswa kwe interlaced scanning kunokonzerwa nekudzikiswa kweiyo chiratidzo bandwidth.Vhidhiyo yakabatanidzwa inoshandisa echinyakare analog terevhizheni masisitimu.Inofanirwa kuongorora mitsara isinganzwisisiki yendima yemufananidzo kutanga uye kune mitsetse ine nhamba-nhamba yendima yemufananidzo.Nokukurumidza kuchinja mifananidzo miviri ye "hafu-frame" inoita kuti iite semufananidzo wakakwana.
Zvinoenderana nedzidziso iri pamusoro, iyo "p" inoreva Progressive Scanning, uye iyo "i" inomiririra Interlaced Scanning.Iyo "1080p 30" zvinoreva Full HD resolution (1920 × 1080), iyo inoumbwa ne30 "full frames" inofambira mberi scan pasekondi.Uye "1080i 60" zvinoreva kuti Full HD mufananidzo unoumbwa ne60 "half-frames" interlaced scan pasekondi.
Kudzivirira kukanganisika uye ruzha runokonzerwa neazvino uye masaini eTV panguva dzakasiyana, National Television System Committee (NTSC) muUSA yakagadzira iyo interlaced scanning frequency kuita 60Hz, yakafanana nealternating current (AC) frequency.Aya ndiwo magadzirirwo anoita 30fps uye 60fps furemu mareti.Iyo NTSC system inoshanda kuUSA neCanada, Japan, Korea, Philippines, uye Taiwan.
Kana iwe ukachenjerera, unomboona here mamwe mavhidhiyo madivayiri nyora 29.97 uye 59.94 fps pane iyo specs?Nhamba dzisinganzwisisike imhaka yekuti pakagadzirwa ruvara rweTV, chiratidzo chemavara chakawedzerwa kune chiratidzo chevhidhiyo.Nekudaro, iyo frequency yechiratidzo chemavara inopindirana neiyo odhiyo chiratidzo.Kudzivirira kupindira pakati pevhidhiyo nemasaini masaini, mainjiniya eAmerica akaderera 0.1% ye30fps.Nekudaro, iyo color TV furemu rate yakagadziridzwa kubva pa30fps kuenda pa29.97fps, uye iyo 60fps yakagadziridzwa kuita 59.94fps.
Enzanisa neNTSC system, mugadziri weTV weGerman Telefunken akagadzira iyo PAL system.Iyo PAL system inotora 25fps uye 50fps nekuti iyo AC frequency ndeye 50 Hertz (Hz).Uye nyika zhinji dzeEurope (kunze kweFrance), nyika dzeMiddle East, neChina dzinoshandisa iyo PAL system.
Nhasi, indasitiri yenhepfenyuro inoshandisa 25fps (PAL system) uye 30fps (NTSC system) seyero yemhando yekugadzirwa kwevhidhiyo.Sezvo kuwanda kwesimba re AC kwakasiyana nedunhu nenyika, saka ive shuwa yekuseta iyo inoenderana system usati wapfura vhidhiyo.Pfura vhidhiyo neiyo isiriyo sisitimu, semuenzaniso, kana iwe ukapfura vhidhiyo nePAL system furemu chiyero muNorth America, iwe uchaona kuti chifananidzo chinobhururuka.
Iyo Shutter uye Frame Rate
Iyo furemu chiyero chakabatana zvakanyanya nekumhanya kwevhavha.Iyo "Shutter Speed" inofanirwa kunge yakapetwa kaviri iyo Frame Rate, zvichikonzera iyo yakanyanya kunaka maonero ekuona maziso emunhu.Semuyenzaniso, kana vhidhiyo ichishanda 30fps, inoratidza kuti kasivhavha yekamera inoiswa pamasekondi 1/60.Kana kamera ichikwanisa kupfura pa60fps, shutter speed yekamera inofanira kunge iri 1/125 second.
Kana iyo shutter ikanyanya kunonoka kusvika kune furemu chiyero, semuenzaniso, kana iyo shutter yekumhanyisa yakaiswa pa1/10 sekondi kupfura iyo 30fps vhidhiyo, muoni achaona kufamba kwakasviba muvhidhiyo.Kusiyana neizvi, kana iyo shutter yekumhanyisa yakakwira zvakanyanya kune chiyero chechimiro, semuenzaniso, kana iyo shutter yekumhanyisa yakaiswa pa1/120 sekondi yekupfura 30fps vhidhiyo, kufamba kwezvinhu kuchaita semarobhoti sekunge akanyorwa akamira. kufamba.
Mashandisiro Ekushandisa Yakakodzera Frame Rate
Iyo furemu mwero wevhidhiyo inokanganisa zvakanyanya kuti mavhidhiyo anotaridzika sei, izvo zvinotarisa kuti vhidhiyo yacho inoratidzika sei chaizvo.Kana iyo vhidhiyo yekugadzira chinyorwa chiri chidzidzo chakamira, senge chirongwa chesemina, kurekodha hurukuro, uye musangano wevhidhiyo, zvinopfuura zvakakwana kupfura vhidhiyo ne30fps.Vhidhiyo ye30fps inopa mafambiro echisikigo sechiitiko chemunhu.
Kana iwe uchida kuti vhidhiyo ive nemufananidzo wakajeka uchiridza mukufamba zvishoma, unogona kupfura vhidhiyo ne60fps.Mazhinji nyanzvi mavideographers anoshandisa yakakwira furemu chiyero kupfura vhidhiyo uye nekuisa yakaderera fps mumashure-kugadzira kugadzira iyo inononoka-inofamba vhidhiyo.Chishandiso chiri pamusoro apa ndeimwe yedzakajairika nzira dzekugadzira inoyevedza yerudo mamiriro kuburikidza neinononoka-inofamba vhidhiyo.
Kana iwe uchida kuomesa zvinhu mukumhanya-mhanya, unofanirwa kupfura vhidhiyo ine 120fps.Tora bhaisikopo "Billy Lynn in the Middle" semuenzaniso.Iyi firimu yakatorwa ne4K 120fps.Vhidhiyo yepamusoro-soro inogona kuratidza zvakajeka iwo iwo chaiwo emifananidzo, senge guruva uye kupfachuka kwemarara mupfuti, uye spark yemoto, ichipa vateereri maonero anoyevedza ekuona sekunge ivo vari pachiitiko.
Chekupedzisira, tinoda kuyeuchidza vaverengi vanofanirwa kushandisa chiyero chakafanana chekupfura mavhidhiyo muchirongwa chimwe chete.Iyo tekinoroji timu inofanirwa kutarisa kuti kamera yega yega inoshandisa yakafanana furemu chiyero paunenge uchiita EFP mafambiro.Kana Kamera A ichishanda 30fps, asi Kamera B ichishanda 60fps, saka vateereri vakangwara vanozoona mafambiro evhidhiyo haaenderane.
Nguva yekutumira: Kubvumbi-22-2022