Ama-codecs: Ayini Kuvidiyo?

ngo kim Kubuyekezwe: June 27, 2022

Codecs ziyingxenye ebalulekile yenqubo yokukhiqiza ividiyo. Ama-codec ayisethi yama-algorithms asetshenziswayo cindezela futhi unciphise amafayela wevidiyo nawomsindo. Ikhodekhi ibalulekile ekwehliseni usayizi wamafayela, ikuvumela ukuthi uwadlulise futhi uwagcine ngokushesha okukhulu.

Kulesi sihloko, sizobe sethula ukuthi ama-codec ayini, basebenza kanjani, kanye nabo ukubaluleka enqubweni yokukhiqiza amavidiyo.

Incazelo ye-Codec

Ikhodekhi ubuchwepheshe obuhlanganisa amavidiyo, umsindo kanye nemifudlana yedatha ngendlela yedijithali. Ama-Codec acindezela idatha ukuze athathe isikhala esincane kwisitoreji noma sokudlulisa, futhi athuthukise ikhwalithi yevidiyo noma ukusakaza komsindo ngokuthuthukisa ukubonakala kwayo noma umsindo.

Ama-codec asetshenziswa kakhulu ekusabalaliseni ifilimu, i-TV nomculo ku-inthanethi. Izinsizakalo zokusakaza ku-inthanethi ezifana I-Netflix, i-Amazon Prime Video ne-Spotify sebenzisa amakhodekhi ukucindezela okuqukethwe kwawo ngaphandle kokuyekethisa ikhwalithi. Ukubhala ngekhodi amavidiyo anamakhodekhi athuthukile kungawenza abe mancane ngosayizi kuyilapho kulondoloza ikhwalithi yezinto zomthombo wokuqala. Lokhu kuvumela izinsiza zokusakaza-bukhoma ukuthi zisabalalise kalula amavidiyo kumakhasimende ngaphandle kokubeka izindleko ezinkulu zomkhawulokudonsa kumanethiwekhi noma nengqalasizinda yawo.

Ngokungeziwe ekunikeni amandla ukugcinwa nokudlulisa okusebenzayo, ama-codec anganikeza ezinye izinzuzo ezimbalwa kubahlinzeki bokusakaza ku-inthanethi abafana:

• Izikhathi zokulayisha ezisheshayo
• Ukusebenza kahle kwamandla
• Ukwehluka okungcono
• Ukuhambisana kwedivayisi okukhulisiwe

Ama-codec angasetshenziswa futhi ngezinjongo zokuphepha ngu ukubethela amafayela okuqukethwe ukuze abasebenzisi abagunyaziwe kuphela bakwazi ukufinyelela kuzo.

Iqhaza lama-codecs kuvidiyo

Codecs, isifinyezo se-“coder-decoder”, ama-algorithms anesibopho sokuminyanisa kanye nokunciphisa amafayela evidiyo nawomsindo. Ngokusebenzisa amasu akhethekile okucindezela, ama-codec ayakwazi ukunciphisa usayizi wamafayela evidiyo nawomsindo ngaphandle kokulahlekelwa yikhwalithi ngokuphawulekayo. Lokhu kunika amandla isivinini sokulayisha nokulanda ngokushesha - noma ngabe usakaza imuvi noma udlala umdlalo ku-inthanethi- kanye nokuthatha isikhala esincane kakhulu kusigcinalwazi sakho.

Ukwengeza, amakhodekhi aphinde asetshenziswe lapho kuqoshwa futhi kucutshungulwa idatha yevidiyo ukuze kwakhiwe izithombe ezinokulungiswa okuphezulu kakhulu ngangokunokwenzeka ngamanani ahlukahlukene ozimele, ama-bitrate, ukujula kombala njll. Ama-codec anquma ukuthi yiluphi uhlobo lobuchwepheshe lokuqopha oluzosetshenziswa - isb. 4K ukulungiswa noma i-HD - ukuze uthuthukise umuzwa wokubuka. Ngokuya ngezidingo ezithile zohlelo lokusebenza ngalunye, kunezinhlobo eziningana ezahlukene zama-codec atholakalayo njenge:

• I-H264/AVC
• .265/HEVC
• I-VC-1/WMV9
• I-MPEG4
• I-VP8/VP9

Ikhodekhi isebenza ngokucindezela okokufaka (okungukuthi, ividiyo noma umsindo) ibe amasayizi amafayili amancane angaphathwa kahle kakhulu ngamanethiwekhi noma agcinwe kumadrayivu endawo; lokhu kwaziwa ngokuthi Ukufaka ikhodi. Ngokuphambene ekudlaleni (isibonelo uma usakaza amavidiyo ku-inthanethi), amafayela acindezelwe kufanele aguqulwe abuyiselwe kufomethi yawo yokuqala yekhwalithi ephezulu etholwa ukucacisa ulwazi olufakwe ngaphambilini; le nqubo yaziwa ngokuthi ukucacisa. Ngosizo lwehardware efanele (njengamakhadi ezithombe njll.), ihadiwe yombhalo wekhodi wokusiza ingathuthukisa isivinini sombhalo wekhodi kakhulu ngokulahleka okuncane kwekhwalithi - okuyenza ifanelekele izinhlelo zokusebenza ezinokuphezulu Ukukalwa kwe fulemu izimfuneko ezifana namasevisi okusakaza-bukhoma esikhathi sangempela noma imidlalo yamafu.

Izinhlobo zama-codecs

Codecs ziwumthombo wempilo wokuqukethwe kwevidiyo - zinquma ukuthi amavidiyo acindezelwa kanjani, acindezelwa futhi asakazwa kanjani. Zisenza sikwazi ukubuka amavidiyo anosayizi abahlukahlukene nezinqumo cishe kunoma iyiphi idivayisi. Kunezinhlobo eziningi ezahlukene zama-codec atholakalayo, ngayinye idlala indima ehlukile ohlelweni lokubuka okuqukethwe kwevidiyo.

Kulesi sihloko, sizobheka ngokujulile izinhlobo ezivame kakhulu zama-codec:

Ama-Codecs alahlekile

Amakhodekhi alahlekile angamazinga okucindezela anciphisa ikhwalithi yevidiyo yokuqala, okudela ikhwalithi yesithombe nedatha ngenxa yosayizi wefayela. Umgomo uwukwenza ukusakaza kwevidiyo kube kuncane ngokwanele ukuze ibukwe noma ilandwe ngokushesha nangempumelelo. Uma kuqhathaniswa nama-codec angalahleki, ama-codec alahlekile ngokuvamile akhiqiza amafayela amancane anedatha encane, kodwa lokhu kuza ngenani le-acuity nokwethembeka okuphelele.

Izinhlobo ezimbili ezivame kakhulu zamakhodekhi alahlekile yilezi i-intraframe or i-bitrate engaguquki (CBR) futhi i-interframe or i-bitrate eguquguqukayo (VBR). Umbhalo wekhodi we-Intraframe urekhoda lonke uhlaka lokuqukethwe njengeyunithi eyodwa ngaphakathi kwefayela ngalinye elicindezelwe; lokhu kubangela amafayela amakhulu kodwa ama-artifact ambalwa phakathi kohlaka ngalunye nezithombe zekhwalithi ephezulu sezizonke. Ukubhala amakhodi ozimele kuhlukanisa izinhlaka zokuqukethwe kube izigaba ukuze kuvunyelwe izigaba ezicindezelwe kakhulu ngaphandle koshintsho olubonakalayo phakathi kwamafreyimu; amafayela angumphumela avame ukuba nosayizi abancane kunama-intraframe kodwa futhi nama-artifact amaningi phakathi kozimele.

Izibonelo ezidumile zama-codec alahlekile zihlanganisa I-MPEG-4 AVC / H.264, I-MPEG-2 futhi H.265 / HEVC, I-Windows Media Video 9 (WMV9), I-RealVideo 9 (RV9), DivX, I-XviD futhi I-VP8/VP9. Lokhu sekudume kakhulu ezinhlelweni zokusakaza ividiyo njenge-YouTube ngenxa yekhono lazo lokucindezela inani elikhulu ledatha ngokushesha ngaphandle kokuzinikela okukhulu ngekhwalithi yesithombe - izivakashi zingabuka amavidiyo amade anoxhumano lomkhawulokudonsa ophansi kuyilapho zigcina ukucaca okubonakalayo okunengqondo.

Ama-Codecs Angalahleki

Amakhodekhi evidiyo awuhlobo lwesofthiwe yekhompuyutha esetshenziselwa ukucindezela idatha yevidiyo yedijithali, noma ukubhala ngekhodi. Le nqubo iyadingeka lapho usebenza ngamafayela amakhulu edijithali ukuze unciphise usayizi wefayela futhi ukwandise ukuthi ifayela lilandwa, lidluliswe noma lisakazwe ngokushesha kangakanani. Ama-codec ahlukaniswe abe izigaba ezimbili ezihlukene: okulahlekayo futhi engenakho ukulahleka amakhodekhi.

Amakhodekhi angalahleki ahlinzeka ngokufana ncamashi kwedijithali kwefayela ngemva kokufakwa kwekhodi ngokunikeza ukunemba okuphelele kwedatha, okuvumela ukuphindwa kwedijithali okunembile ngesikhathi sokuwohloka. Kuthatha isikhala esiningi kune ukucindezela okulahlekile kodwa futhi akubandakanyi ukuhlanekezela kwayo kanye nokuvumela kalula ukuhlelwa komsindo/isithombe ngaphandle kokuphazamiseka ngekhwalithi. Ama-codec angalahleki afaka ama-algorithms afana nalawa:

• I-LZW
• I-JPEG LS
• I-FLAC
• ALAC
• I-MPEG-4 ALS

I-Hardware Codecs

I-hardware codecs amakhodekhi asebenzisa izinsiza zehadiwe ezizinikele ukuhlanganisa nokukhipha amasignali evidiyo. Amanye amasistimu ekhompuyutha amasha, njengamakhompyutha aphathekayo, afaka iyunithi yesifaki khodi sevidiyo esekwe kuhadiwe engasetshenziswa ukusheshisa inqubo yombhalo wekhodi. Lawa mayunithi asebenza kahle kakhulu futhi anganikeza izinzuzo zokusebenza ezibalulekile ngaphezu kwamakhodekhi asekelwe kusofthiwe. Ngaphezu kwalokho, amanye ama-codec wehadiwe ezimele akhona anikeza imiphumela yekhwalithi yobuchwepheshe yokusakaza/ukusakaza izinhlelo zokusebenza.

Izinhlobo ezimbili eziyinhloko zamakhodekhi ehadiwe yilezi Ukucindezela/Ukufaka ikhodi futhi Ukuqopha ama-Codec:

• Ukucindezela/Ukufaka ikhodi Amakhodi: Lawa madivayisi avame ukuza nesofthiwe yawo yobunikazi, nakuba ezinye izinketho zingatholakala futhi. Basebenzisa izingxenye ezikhethekile ukwenza umbhalo wevidiyo ngesivinini esikhulu ngaphandle kokusebenzisa amandla amaningi noma Amandla e-CPU okuhlobene nezifaki khodi zesofthiwe. Njengezifaki khodi zesofthiwe, ngokuvamile zizokhiqiza amafomethi ahlukahlukene okukhiphayo njenge H.264 noma i-MPEG-2/4 amafomethi.
• Ukuqopha ama-Codec: Ekwaziwa nangokuthi amakhadi okukhipha amakhodi noma ama-accelerator okukhipha amakhodi, lawa madivayisi afaka ama-chips anamandla aklanyelwe ukuqopha amasiginali evidiyo acindezelwe ngesikhathi sangempela ngaphandle kokusebenzisa izinsiza zesistimu eziningi kakhulu (Amandla e-CPU). Amakhadi okukhipha amakhodi anikezelwe avamile ezindaweni ezichwepheshile lapho izinombolo ezinkulu zamavidiyo zidinga ukucindezelwa ngokushesha kube nomthelela omncane ekusebenzeni kwesistimu nokuzinza.

Ama-Codecs adumile

Codecs zibalulekile kunoma ubani osebenza ngemidiya yevidiyo. Ziyizithako zefayela lakho levidiyo, izithako ezivumela isidlali sevidiyo ukuthi sihlukanise phakathi kwevidiyo nomsindo, nezindlela zokucindezela idatha ukuze kube lula ukuyigcina nokuyisakaza. Kunezinhlobonhlobo zama-codec atholakalayo, futhi efanele yephrojekthi yakho idinga ukukhethwa.

Kulesi sigaba, sizoxoxa nge ama-codec aziwa kakhulu:

H.264

H.264 (obeye aziwe njengo I-MPEG-4 AVC) ingenye yama-codec aziwa kakhulu okufaka ikhodi amafayela evidiyo edijithali ukuze asetshenziswe ezinhlelweni ezihlukahlukene - kusukela kumasevisi okusakaza-bukhoma kuya kubadlali be-Blu-ray kuya kuma-smartphone. Ikhono layo lokucindezela ividiyo yekhwalithi ephezulu ibe osayizi bamafayela abancane kuyenza ibe enye yamakhodekhi asetshenziswa kakhulu futhi ahlukahlukene emakethe namuhla.

I-H.264 isebenza ngokwephula amafreyimu edijithali abe amabhulokhi amaphikseli angu-8×8 bese iwacindezela ngohlu lwama-algorithms ahlukahlukene. Ngenxa yokuthi i-H.264 isebenza kahle kakhulu, ingakha ividiyo yedijithali yekhwalithi ephezulu kakhulu ngisho nakuma-bitrate aphansi kakhulu, iyenze ifanelekele uhla olubanzi lwezinhlelo zokusebenza kusukela ekusakazweni kwe-HDTV kuya kuzidlali zemidiya zabathengi kanye nezinsiza zokusakaza ze-smartphone/ithebhulethi.

I-H.264 ihlinzeka ngokusekela kokubili kokuskena okuqhubekayo (lapho yonke imigqa yesithombe iqala ukuskena ngesikhathi esisodwa) kanye nevidiyo yokuskena ehambisanayo, nakuba amakhodekhi amaningi esimanje asekela ukuskena okuqhubekayo kuphela ngenxa yokuthi asebenza kahle kakhulu ngokosayizi wefayela kanye nokusetshenziswa komkhawulokudonsa. I-H.264 iyakwazi futhi ukuphatha izinqumo kuze kube 4K (4096×2160 pixels), ukwenza isiqiniseko sokuthi kuhlala kusebenza njengoba abadali bokuqukethwe abengeziwe besondela ezinqumweni ezinkulu ngokuhamba kwesikhathi.

Kanye nokusebenza kahle kwayo, enye yezinzuzo eziyinhloko ze-H.264 ukuthi iye yamukelwa abakhiqizi bemishini abaningi kakade okwenza kube lula kubasebenzisi ukuthumela okuqukethwe phakathi kwamadivayisi ngaphandle kokukhathazeka ngezinkinga zokuhambisana noma ukumiswa kwesofthiwe/izingxenyekazi zekhompyutha ezingahambelani. Ngalesi sizathu, i-H.264 iyaqhubeka nokuhlala iyikhodekhi ebalulekile yezinhlobonhlobo zamadivayisi nezinhlelo zokusebenza namuhla, ngaphandle kwezinketho ezintsha ezitholakalayo njenge. I-HEVC (Ukusebenza Kokufaka Amakhodi Ngekhwalithi Ephezulu).

H.265

H.265, obeye aziwe njengo Ukubhala Ngekhodi Kwevidiyo Esebenza Kakhulu (HEVC), iyindinganiso yokucindezelwa kwevidiyo ehlinzeka ngekhodi esebenza kahle kakhulu kunokwandulelayo, I-H.264/MPEG-4 AVC (Ukubhala Ngekhodi Kwevidiyo Okuthuthukisiwe). Isekela ukulungiswa kwe-8K futhi ingacindezela amafayela wevidiyo aze afike kabili ngokuyimpumelelo njengezinga elidlule - kuze kufike Ukugcinwa kwekhwalithi okungamaphesenti angu-40 ngaphezulu kunalowo owandulelayo.

I-H.265 ingumlandeli wemvelo we-H.264/MPEG-4 AVC, ehlinzeka ngamakhono amakhulu okucindezela anezinkinga ezincane kanye nokudlala okushelelayo kumadivayisi okudlala afana nomabonakude, ama-smartphone, amakhompyutha aphathekayo namathebulethi. Kuyifomethi yomthombo ovulekile elungele zonke izinhlobo zokuqukethwe - kusukela ekusakazweni kwe-TV kuya ekusakazeni amavidiyo nge-inthanethi nama-Blu-ray discs - okuvumela abadali bokuqukethwe ukuletha ikhwalithi ephezulu yevidiyo kuyilapho benciphisa izindleko zomkhawulokudonsa.

Ukuvumelana nezimo kwe-H.265 kuyenza ikwazi ukusetshenziswa kuhlelo olubanzi olufana nalokhu:

• Sakaza umabonakude (okuhlanganisa i-4K noma i-8K)
• Izinsiza zokusakaza-bukhoma nezokuxhumana ezihlanganisa lezo zamadivayisi eselula nawesathelayithi
• Okokuzithokozisa okungokoqobo
• Izicelo zokunakekelwa kwezempilo
• Ifomethi entsha yesithombe se-HEIF - okwenza kube nokwenzeka ukuthi izithombe ezithathwe kumakhamera anganyakazi edijithali noma amafoni amakhamera acindezelwe kakhulu kunangaphambili ngaphandle kokulahlekelwa imininingwane yesithombe.

VP9

VP9 iyikhodekhi yevidiyo evulekile nengenanzuzo eyakhiwe i-Google. Yakhelwe ukusetshenziswa ezinhlelweni zokusebenza zewebhu, inikezela ngobuchwepheshe besimanjemanje ngokucindezelwa okuthuthukisiwe kokusakaza nokulanda ngama-bitrate aphansi.

I-VP9 futhi inezici ezahlukahlukene eziwusizo ezinhlelweni zevidiyo:

• ububanzi obuguquguqukayo obuphezulu nezikhala zombala,
• imodi yombhalo wekhodi engalahleki,
• ukusakaza okuguquguqukayo kanye nokuqina kwesishumeki.

Isekela amaphikseli angewona ayisikwele, izikwele ezigqagqene zemibala ehlukene noma amanani okukhanya, izindlela zokubhala ikhodi zokubikezela zesikhashana (njengesinxephezelo sokunyakaza) kanye nezindlela zokubhala ikhodi zokubikezela kwe-intra (njengokuguqulwa kwe-cosine okusobala). I-VP9 futhi inamandla okufaka ikhodi ngezithombe ezifika ku 8 amabhithi wokujula kombala ngephikseli ngayinye. Ifomethi inika amandla ikhwalithi yesithombe engcono ngemininingwane ebonakalayo njengamaleveli omsindo ancishisiwe kanye nemiphetho ebukhali ngaphezu kwamanye amakhodekhi angaphambili.

Lapho uqopha ukusakaza kwe-VP9, idivayisi yomsebenzisi yenza wonke umsebenzi ukuze ibuyisele ohlakeni olulodwa lwevidiyo. Lokhu kuyenza ifinyelele ngokushesha futhi kuvumela ukudlalwa ngokushesha kunamanye ama-codec ngenxa yayo izidingo zememori ephansi. Lokhu kusebenza ikakhulukazi uma abasebenzisi be-inthanethi befinyelela ukusakazwa okuningi ngesikhathi esisodwa kusuka emithonjeni eminingi; bangakwenza lokho ngaphandle kokuthi zonke izinsiza zabo zekhompuyutha ziboshelwe ekuqopheni ngayinye ngokwehlukana. Ukwengeza, ukulethwa kusetshenziswa ifomethi yefayela evamile njenge MP4 isiza ukunika amandla ukusebenzisana phakathi kwamadivayisi noma izinkundla okungenzeka zingakwazi ukubuka okuqukethwe okufakwe ikhodi kwamanye amafomethi afana ne-WebM noma i-MKV.

Ama-codec kanye nekhwalithi yevidiyo

Codecs ziyingxenye ebalulekile yombhalo wekhodi nokuqopha ividiyo, okungase kube nomthelela ku izinga levidiyo. Ama-codec asetshenziselwa ukucindezela kanye nokucindezela amafayela evidiyo, futhi uhlobo lwe-codec olukhethayo lungathinta usayizi nekhwalithi yevidiyo.

Kulesi sihloko, sizoxoxa ngezinhlobo ezahlukene zama-codec kanye zingathinta kanjani ikhwalithi yevidiyo:

Bitrate

Bitrate isilinganiso sokuthi lungakanani ulwazi oludingwa yikhodekhi ukumela ividiyo ethile. Ikalwa ngamabhithi ngomzuzwana, i-bitrate ingathinta kokubili izinga levidiyo futhi izoba nkulu kangakanani usayizi wefayela layo.

Ukuphakama kwe-bitrate, i imininingwane eyengeziwe ingafakwa kunqubo yokufaka ikhodi (noma ukuminyanisa). futhi ngaleyo ndlela ikhwalithi yesithombe engcono ozoyithola. Nokho, kusho nokuthi amafayela amakhulu azodinga ukugcinwa noma ukudluliselwa. Uma uthumela ividiyo yakho nganoma yiluphi uhlobo lwenethiwekhi yedijithali (njenge-inthanethi), ungathola ukuthi ama-bitrate aphezulu abangela ukwanda okubonakalayo kokubambezeleka noma isikhathi sokubhafa.

Esinye isici esithinta i-bitrate ukulungiswa - njengoba izinqumo zikhula, kanjalo nosayizi wefayela - kodwa lokhu kuncike kwezinye izici ezifana amakhodekhi asetshenzisiwe, izinga lozimele namasayizi ozimele. Ngokuvamile, ama-bitrate aphansi avame ukunikeza amavidiyo asezingeni eliphansi ngisho noma ezinye izici ezifana nokulungiswa ziphezulu.

Ama-codec wonke anobubanzi bawo obufanele obuphakanyisiwe ikhwalithi yesithombe ehamba phambili kanye nokusetshenziswa okuncane kwedatha ngakho-ke qiniseka ukuthi ubheka izifaki khodi ozikhethayo phakathi nenqubo yokuminyanisa.

Resolution

Ukulungiswa isilinganiso solwazi lwevidiyo ngokwamaphikseli, futhi kungenye yezinto eziyinhloko ezinquma ikhwalithi yevidiyo. Kubalulekile ukukuqonda lokho izinqumo eziphakeme zizohlala zikhiqiza amavidiyo abukeka kangcono ngoba kukhona amaphikseli amaningi aminyene kuhlaka ngalunye. Izinqumo ezivame kakhulu ezisetshenziswa ekusakazeni ku-inthanethi yilezi I-1920 × 1080 (i-HD ephelele) futhi 1280 × 720 (HD).

Ividiyo enokulungiswa okuphezulu idinga amandla engeziwe okucubungula, angabangela izinkinga zokusebenzisana uma isistimu yomsebenzisi ingekho esikhathini. Amavidiyo anokulungiswa okuphakeme aphinde asho amafayela amakhulu adinga i-codec engcono ukuze akwazi ukudlala kahle kuwo wonke amadivayisi. Amakhodi emboni ajwayelekile asetshenziselwa ukusakaza ku-inthanethi ahlanganisa I-H.264 noma i-AVC, i-VP8, i-VP9 ne-HLS noma i-Apple HLS (Ukusakaza bukhoma kwe-HTTP).

Ngokuya ngohlelo lwakho lokusebenza kanye nohlobo lwedivayisi ohlela ukuletha kuyo okuqukethwe kwakho kuzonquma ukuthi iyiphi i-codec ekulungele wena.

Ekugcineni, uma unokusethwa kombhalo wekhodi ofanele okufaka i- i-codec engcono kakhulu etholakalayo khona-ke akufanele ube nenkinga yokuletha amavidiyo ekhwalithi ephezulu kunoma yikuphi ukulungiswa engeke ihlupheke ngenxa yokugcinwa kumthamo noma ezinye izinkinga zokudlala ngenkathi isalondoloza izinga elihle lokwethembeka okubonakalayo.

Ukukalwa kwe fulemu

Ukukalwa kwe fulemu isici esibalulekile uma kuziwa kwikhwalithi yevidiyo namakhodekhi. Kuyisilinganiso sokuthi mangaki amafreyimu angawodwana athwetshulwa ngomzuzwana owodwa, ngokuvamile akalwa ngawo ozimele ngesekhondi (FPS). Uma izinga lozimele liphezulu, okuqoshiwe kuzovela kahle. Izinga lozimele eliphansi liholela kuvidiyo eguquguqukayo, kuyilapho amanani ozimele aphezulu esebenza kangcono ekunikezeni isithombe esiwuketshezi.

Isibonelo, uma urekhoda ngekhamera ye-FPS engu-8 uma iqhathaniswa nekhamera engu-30 FPS, ikhamera ye-FPS engu-8 izokhiqiza izithombe ze-choppier ngenxa yenani eliphansi lamafreyimu ngomzuzwana. Ngakolunye uhlangothi, ikhamera ye-FPS engu-30 ikhiqiza izithombe ezibushelelezi ezinokufiphala okuningi kokunyakaza phakathi kwayo kunekhamera ye-FPS eyi-8 njengoba kuzoba namafreyimu athwetshuliwe aphindwe kathathu.

Phezu kwalokho, amakhodekhi ahlukene adinga ubuncane obuhlukile noma amanani aphezulu wozimele ukuze uthole imiphumela emihle. Uma isetshenziswe ngendlela engafanele noma ngaphandle kokwazi izimfuneko zekhodekhi yakho zokuhambisana nezinga lozimele, ikhwalithi yevidiyo yakho ingase ibe sengozini. Izilinganiso zozimele ezivamile ezivamile zamafomethi amaningi wamanje wamavidiyo kanye nokuzizwisa kokubuka 24 fps (amafilimu) kanye ne-30 fps (imidlalo ye-TV). Kodwa-ke, amanye ama-codec angasekela aphakeme futhi - njenge 48 fps noma ngisho 60 fps - ngenkathi ihlinzeka ngokubonwayo okuphezulu nokushelela uma kuqhathaniswa nozakwabo abaphansi.

Isiphetho

Sengiphetha, ukuqonda amakhodekhi kuyingxenye ebalulekile yokudala nokubuka amavidiyo emishini yethu yedijithali. Ukwazi izisekelo zamakhodekhi omsindo nevidiyo, izincazelo zawo, nomehluko omkhulu phakathi kwazo kungasisiza senze isinqumo esinolwazi olungcono lapho sikhetha futhi sibuka imidiya yedijithali. Ukwengeza, ukuba nombono jikelele we amakhodekhi evidiyo asetshenziswa kakhulu futhi ingasinikeza ukuqonda okwengeziwe kokuthi amakhodekhi ahlukene angakushintsha kanjani ukubukeka nomsindo wevidiyo.

Okokugcina, kuyasiza ukukhumbula lokho akuwona wonke amakhodekhi wevidiyo ahambisanayo—okusho ukuthi amavidiyo athile adinga ikhodekhi eyodwa angase angadlali kahle kwenye idivayisi uma ingaluboni lolo hlobo. Ngenhlanhla, manje sinezinketho eziningi kunangaphambili uma kuziwa ekubukeni okuqukethwe kwethu kwedijithali okuyintandokazi—okuhlanganisa nokusebenzisana okungcono kuzo zonke izinkundla eziningi. Ngakho-ke thatha isikhathi sakho ucwaninga ifomethi ekufanele futhi uthole ukuthi iyiphi esebenza kangcono ngezidingo zakho!

Sawubona, nginguKim, umama kanye nomshisekeli we-stop-motion onesizinda ekudalweni kwemidiya nokuthuthukiswa kwewebhu. Nginothando olukhulu lokudweba nokugqwayiza, futhi manje sengingena ngekhanda emhlabeni onyakazayo. Ngebhulogi yami, ngabelana ngezifundo zami nani bafana.