3GP → MOV

Ndikugwirizana ndi ma DVD a 4K, ndipo ndi njira yofulumira. 3GP ndi MOV amagawana bokosi lofanana lokhala ndi bokosi, kotero mavidiyo ndi ma audio streams amakopedwa m'ma byte-by-byte ndipo ma container wrapper okha amalembanso. Sichidzatha kusinthidwa ndipo sichidzasinthidwa, kotero fayilo ya feature-length imatha m'maola angapo m'malo mwa maola awiri, ndi mtundu wa output womwe uli ndi mtundu wofanana ndi wopanga. 3GP ndi chonyamula 3GPP standardized kwa mafoni amakono, pamene kanema anayenera kugwirizana ndi 176x144 chophimba ndi 2G deta ndondomeko. MOV ndi Apple QuickTime chidebe, anatumizidwa mu 1991 ndibe mtundu iPhone, iPad kapena Final Cut Pro timeline alemba mwamsanga.

Ndikofunika. 3GP ilibe nyimbo yogwiritsa ntchito yopanda malire, chifukwa chake ma subtitle a 3GP amayenera kuphulika m'mavidiyo kapena kutumizidwa ngati fayilo ya sidecar yosiyana. MOV amabweretsa ma subtitle monga ma stream awo osankhidwa, chifukwa chake pambuyo posintha mutha kuwonjezera SRT track yomwe woyang'anira angagwiritse ntchito, kuchotsa kapena kubwezeretsa.

Ndikoyenera, ndipo ndi chithandizo choyenera pa 3GP. MOV imachita chilichonse cha audio monga chida chabwino kwambiri, choncho mgwirizano wachilankhulo chachikhalidwe, dub ndi woyang'anira woyang'anira amatha kukhala m'fayilo imodzi ndi wosewera yemwe amasintha pakati pawo pazosowa. MOV ndi mtundu wogwira ntchito olemba akufuna, chifukwa amasangalala anabwereza round-zoyendayenda mwa Final Cut Pro, Premiere ndi DaVinci Resolve popanda kuwonongeka kwa chitukuko.

Amachita. MOV amasunga masamba monga metadata ya kontena, kotero kuti kujambula kwanthawi yayitali kungagwiritsidwe ntchito pogwiritsa ntchito gawo lomwe limatha kusinthidwa pogwiritsa ntchito bar ya progress. 3GP sichingakhalepo kuti ipereke mfundozi, chifukwa chake ngati chiyambi chidatumizidwa ndi mndandanda wa kapitoli, chidapezeka mu fayilo ya sidecar - bweretsani kuti musinthe ndipo chimalemba mu MOV.

Ndikoyenera - zonse zolemba za audio mu 3GP (kuwunika kwa woyang'anira, mabungwe osiyanasiyana, mawu ofotokoza) amasungidwa mu MOV pamene chikwama chofunikira chimathandizira ma audio ambiri. MKV ndi MOV amayendetsa ma audio osatha; MP4 amathandizira ambiri koma ena osewera a hardware amawona kokha track 1; WebM imatha pa Opus / Vorbis track.

Ma subtitle olimba (ma tracks osankhika) amapulumuka pamene MOV angawagwiritse ntchito: MKV amagwiritsa ntchito SRT, ASS, SSA, PGS, VobSub mwachilengedwe; MP4 amagwiritsa ntchito mov_text (format yosasinthasintha). Kusintha MKV ndi subs a ASS ku MP4 kumawawononga kuti akhale mov_text kapena kuwalemba. Hardsubs (olembana mu kanema) amagwiritsa ntchito ngakhale.

Metadata ya bokosi limasintha pakati pa 3GP ndi MOV pamenepo onse awiri amapereka bokosi la atomu (MKV, MP4, MOV). WebM imasunga bokosi m'ma block ogwirizana ndi Matroska, choncho MKV <-> WebM bokosi limayenda molimba. AVI sichimakhala ndi bokosi la spec, choncho kusintha kwa AVI ku MOV kumabweretsa fayilo yosasinthika ngati simuwonjezera ma markers m'manja.

MKV ndi yokha mainstream yokhala ndi ma fayilo ophatikizidwa (TTF fonts for ASS subs, JPG cover art, fan-translated PDF inserts). Kuchokera ku 3GP kupita ku MOV kumachotsa ma attachments pamene MOV si MKV - ma streams elementary amasinthidwa, koma payload ophatikizidwa amakhala m'malo ochokera. Tengani 3GP ngati chitetezo ngati mumatengera ma fonts ophatikizidwa.

Kodiyi ya default imasankhidwa kuti igwirizane ndi MOV yokhala ndi katundu: MKV imasinthidwa kukhala H.265 (HEVC) kuti ikhale yolimba kwambiri; MP4 imasinthidwa kukhala H.264 kuti ikhale yolimba kwambiri; WebM imasinthidwa kukhala VP9; AVI imagwiritsa ntchito MPEG-4 ASP (DivX / Xvid linage). MOV owona ndi lalikulu, ndi kunja kwa Apple ecosystem kusewera thandizo ndi patchier kuposa MP4 - atsopano Android amaumba ndi ena Smart TVs adzakana iwo.

HDR static metadata (HDR10 mastering display values, max content light level) imatha kupita ku MOV pamene ma kontena awiri ndi codec osankhidwa amathandizira (HEVC, AV1 mu MKV / MP4). Dolby Vision ndi wolimba kwambiri - DV profile 5 / 7 / 8.1 mu 3GP nthawi zambiri amapulumuka okha ku MKV ndi HEVC; kusinthidwa ku MOV kontena lomwe silitha kunyamula gawo la DV limatha ku HDR10.

MKV ndi WebM amalemba ma timestamps a real-frame ndi kuwongolera VFR mwanjira yachibadwa, kotero kuti 3GP VFR imatha kukhala ndi MOV ya mafomuwa popanda kubwezeretsa. MP4 imasunga nthawi yowonjezerapo koma ena osewera amaganiza kuti CFR; wosintha amatulutsa "kulepheretsa CFR" kuti abwezeretse VFR 3GP ku 24 / 30 / 60 fps MOV kwa zolinga zosatheka.