MOV vs MP4
MP4 thiab MOV yog ob hom ntaub ntawv uas tuaj yeem siv los khaws cov suab thiab cov yeeb yaj kiab. Tshwj xeeb lawv yog hu ua cov ntaub ntawv ntim. MP4 yog ib qho kev txhim kho raws li hom MOV, thiab lawv sib koom ntau qhov sib xws hauv cov qauv thiab zoo.
MOV (QTFF)
Quick time file format (QTFF) yog hom ntaub ntawv tsim los ntawm Apple lub khoos phis tawj rau lawv lub sijhawm ceev media player. Vim tias nws muaj peev xwm piav qhia txog cov qauv kev tshaj tawm, QTFF yog hom ntaub ntawv zoo rau kev sib pauv ntawm cov xov xwm digital ntawm cov khoom siv, kev siv, thiab kev khiav haujlwm.
QTFF tuaj yeem muaj ib lossis ntau qhov hauv cov ntaub ntawv, nrog rau txhua txoj kev ua yeeb yaj kiab, suab, cuam tshuam lossis cov ntawv nyeem ntawm tib lub kwj. Cov lem yog khaws cia nyob rau hauv lub thawv nyob rau hauv ib tug hierarchical cov ntaub ntawv qauv uas muaj cov khoom hu ua movie atoms. QTFF hom ntawv yog hom khoom-taw qhia thiab muaj cov khoom siv hloov pauv tau yooj yim uas tau txheeb xyuas tau yooj yim thiab nthuav dav. Cov khoom tsis paub hauv lub thawv tuaj yeem yooj yim tsis quav ntsej, tso cai rau kev sib raug zoo rau pem hauv ntej raws li cov khoom tshiab tau qhia.
Txoj kev paub daws teeb meem coj los ntawm cov khoom taw qhia hauv lub thawv tso cai rau cov ntaub ntawv paub daws teeb meem rau cov xov xwm atoms thiab sib cais ntawm cov ntaub ntawv xov xwm los ntawm kev tshaj tawm offsets thiab taug qab cov npe kho kom haum rau kev kho lub hom phiaj ib yam nkaus.
Txawm tias nws muaj peev xwm ua tau zoo thiab qhov zoo, QTFF cuam tshuam rau kev txhim kho thiab kev siv vim yog tus tswv ntawm txoj cai.
Cov ntaub ntawv txuas ntxiv.mov thiab.qt yog siv nrog hom ntaub ntawv no.
MP4
MP4 yog hom ntawv ntim cov ntaub ntawv tsim los ntawm Moving Pictures Experts Group rau International Standards Organization, thiab nws yog raws li QTFF. Qhov tseeb, thawj qhov kev tso tawm ntawm hom ntawv yuav luag zoo ib yam rau QTFF. Tseem lawv muab cov qauv zoo ib yam, tab sis MP4 tau txav mus rau ncua sij hawm thiab tsim mus rau hauv lub thawv siab dua. Tam sim no nws yog ib feem tseem ceeb ntawm ISO hauv paus xov xwm cov ntaub ntawv hom qauv.
Widely used data streams in the MP4 file format is MPEG-4 Part 10 (H.264) and MPEG-4 Part for video and Advanced Audio Coding for audio streams. Sub titles siv MPEG-4 Timed Text cov ntaub ntawv ntws.
Txij li thaum pib txoj kev loj hlob raws li QTFF, ntau tus qauv ntawm MPEG-4 yog tib yam. Hauv Apple ib puag ncig (MacOS lossis iOS), cov ntaub ntawv no tuaj yeem siv sib hloov. Cov ntaub ntawv hom tuaj yeem hloov pauv yam tsis tau rov encoding video. Lub MP4 muaj qhov zoo ntawm kev muaj peev xwm tshaj tawm hauv internet thaum QTFF tsis txaus siab rau qhov no. Tsis tas li ntawd, MP4 yog txaus siab los ntawm feem ntau ntawm cov OS platforms thiab video editing software. Cov zej zog nyob ib ncig ntawm tus qauv tau loj hlob, thiab kev koom tes los ntawm cov zej zog tau ua kom muaj kev vam meej ntawm tus qauv hauv kev lag luam; ib yam dab tsi QTFF tsis txaus siab vim yog nws tus kheej tsim.
MPEG4 cov ntaub ntawv siv.mp4 txuas ntxiv, tab sis nyob ntawm daim ntawv thov txuas ntxiv siv yuav txawv. Piv txwv li, cov ntaub ntawv suab nkaus xwb tuaj yeem siv.m4a txuas ntxiv. Raw MPEG4 video ntsis kwj yog muab lub.m4v extension. Cov ntaub ntawv video tawm tswv yim siv hauv cov xov tooj ntawm tes kuj yog kev txhim kho los ntawm MPEG4-12, thiab lawv siv.3gp thiab.3g2 txuas ntxiv. Cov phau ntawv suab siv.m4b txuas ntxiv vim qhov hloov pauv hauv cov cai tso cai rau bookmarking cov ntaub ntawv suab.
Qhov txawv ntawm MOV (QTFF) thiab MP4 yog dab tsi?
• Quick Time File Format lossis MOV yog tsim los ntawm Apple rau lawv Quick Time player, thiab nws yog hom ntaub ntawv muaj tswv.
• MP4 yog hom ntaub ntawv raws li QTFF los ntawm Moving Pictures Experts Group tsim los ntawm ISO, thiab MP4 tsis yog lub thawv uas muaj tswv. Nws yog tus qauv kev lag luam, thiab ib feem ntawm ISO hauv paus xov xwm cov ntaub ntawv hom qauv.
• Ob QTFF thiab MP4 yog lossy video ntaub ntawv tawm tswv yim thiab qhia tib cov ntaub ntawv architecture thiab hierarchy, thiab nyob rau hauv ib puag ncig Apple lawv tsuas yog hloov pauv tau los ntawm kev hloov cov ntaub ntawv txuas ntxiv, tsis tas yuav hloov pauv qhov encoding.
• MP4 tau txais kev txhawb los ntawm feem ntau ntawm OS thiab kev lag luam software, nrog rau cov zej zog loj rau kev txhawb nqa thiab kev loj hlob.
