VOB → JPG

Guqula Eyakho VOB kuya JPG amafayela kalula

Khetha amafayela akho

noma cindezela bese ususa amafayela akho lapha

I-Free Plan: 1 Ukushintsha/ihora · Iya ngaphandle komkhawulo →

Tshintsha amafayela mahhala, Pro abasebenzisi bangaguqula amafayela amakhulu kakhulu; Bhala manje

Ukulayisha

Indlela yokuguqula VOB kuya JPG

Isinyathelo 1: Layisha eyakho VOB amafayela usebenzisa inkinobho engenhla noma ngokuhudula bese uphonsa.

Isinyathelo 2: Chofoza inkinobho ethi 'Guqula' ukuze uqale ukuguqulwa.

Isinyathelo 3: Landa i-version yakho JPG amafayela

VOB kuya JPG Imibuzo Evame Ukubuzwa Yokuguqulwa

Ngiyikhipha kanjani ifreyimu kusuka ku VOB ividiyo njenge JPG izithombe?

Layisha phezulu i VOB futhi umguquli ubonisa isikhethi sefremu-sokuzisusa: yonke ifremu ye-Nth, amafremu ezikhathini ezikhethekile, noma ifremu eyodwa ngesekondi. Ifremu ngayinye ekhethiwe ikhodwe njengehele JPG elilodwa futhi isethulo esigcwele siqoqwe kwi-ZIP archive yokulayisha. VOB yividiyo equkethwe okutholakalayo kwifolda VIDEO_TS ngayinye ye-DVD — i-MPEG-2 izinhlelo ezihambayo ne-DVD-ekhethekile yokubuka idatha engeziwe. I-JPG iyisimo se-JPEG esijwayelekile kusukela ngo-1992, futhi ngemuva kweminyaka emithathu ihlala iyisimo esisetshenziswa amakhamera amaningi namanye amawebhusayithi asebenzisa ama-photos.

Kungani amafreyimu ami akhishwayo anemigqa ejikelezayo edlula kuwo?

Ngenxa yokuthi umsuka uxhunywe. VOB okuqukethwe kusuka ku-broadcast ne-DVD era igcina ama-fields amabili aphakathi nendawo aphezulu ngefremu ngayinye, athathwe ngengxenye engu-50 yesithupha, futhi i-still ekhishwa ngokuqondile ibonisa ukuthi zombili zixhunywe ndawonye njenge-combing nganoma yini ehambayo. Vumela u-deinterlacing ngaphambi kokukhipha futhi i-still ngayinye ikhiwa kusuka ku-frame eqhubekayo evuselelwe.

Ingabe izihloko ezingezansi zizovela kuma-JPG amafreyimu engikhiphayo?

Akunakwenzeka uma beyi-subtitle track engokoqobo. VOB igcina izihloko ezingezansi njenge-stream yabo futhi umdlali uzobasusa phezu kwesithombe ngesikhathi sokudlala, ngakho ifremu eqoshiwe umguquli ubhala ngaphandle njenge-JPG ine-pixels ehlanzekile ngaphansi. Izihloko ezingezansi eziboshwe kwividiyo ngaphambi kokuba ibe yi-VOB ziyinkinga ehlukile - lapho ziyingxenye yesithombe futhi ifremu ngayinye ekhishwayo igcina lezi.

Ingabe ngizokhipha i JPG kusuka kusiqephu ngasinye se-VOB?

Akunakungathi inkinobho eyodwa, kodwa VOB yenza kube lula: amaphawu esigaba agcinwa ebhokisini njengezipho zosuku, ngakho funda uhlu lwesigaba ngaphandle kwefayela bese ufaka amahora ezindaweni zesiqephu. Uthola JPG eyodwa ngesigaba ngasinye, ngokulandelelana, okuyindlela ejwayelekile yokwakha izithonjana zokurekhoda okude. Amacebo angenamagama esigaba ashiya ukukhetha izimo ngemehlo endaweni. I-VOB igcina yonke i-DVD payload - ama-angles amaningi, izilimi eziningi zomsindo nama-subtitle tracks wonke ahlala ngaphakathi.

Yini isilungiselelo sekhwalithi okufanele ngisebenzise ku-JPG?

Umgangatho 85 ulungile futhi usetshenziswa uma ungashintshanga - ubukeka ungafani nomthombo kude kakhulu, kuncane kakhulu kuncane kunesithupha sesimo esifanayo. Chofoza ku 95 nganoma yini ezoguqulwa noma iphrintwe, bese ukhuphuka ku 70 ngezithombe ezincane lapho ubukhulu bulawula khona. I-JPG ilahlekelwa yisimo: isithombe siguqulwa nge-DCT, silinganiselwe, futhi sikhonjiswa nge-entropiya, nge-nobhu wobude olawula ukuthi yini elahlekile.

Ngabe usinqumo sinjani uma ifreyimu ngayinye ekhishwayo JPG iphuma?

Ukulungiswa okufanayo njenge VOB ividiyo — 1080p VOB ikhiqiza amafreyimu angama-1920×1080 JPG; 4K VOB ikhiqiza amafreyimu angama-3840×2160 JPG. Sebenzisa ukuguqula usayizi ngemuva kokukhipha uma ufuna amathumbnail amancane noma ama-social-media-size crops.

Ingabe ngizokhipha ifreyimu ngayinye esuka ku VOB njenge JPG?

Yebo, kodwa qaphela ngokubalwa kwefayela — i-30fps 1-minithi VOB ikhiqiza amafreyimu angama-1,800 JPG. Siwafaka ngokuzenzakalela ku-ZIP. Ku-clip ezide, "1 ngesekondi" (ifreyimu engu-60) noma ama-timestamps athile anikeza imiphumela elawulwayo.

Ingabe izithombe ezikhishwayo JPG zizogcina umbala VOB olinganiselwe?

Yebo — umbala uqokwa nge-matrix esetshenziswa umsuka VOB (BT.709 ku-HD, BT.2020 ku-4K HDR). Umsuka we-HDR u-tone-map ku-SDR uma ukhishwa ku-JPG ngoba amafomethi amaningi JPG (PNG, JPG) angagcina ama-pixels we-HDR ahlukene ngokusemthethweni.

Yini ubukhulu behele lwesiphequluli esisodwa esikhishwayo JPG?

Kuxhomekeka kusinqumo kanye ne JPG codec. Ifreyimu ye-1080p PNG ivame ukuba 2 kuya ku-5 MB; i-1080p JPG esezingeni-85 ivame ukuba 200 kuya ku-500 KB; i-4K PNG ivame ukuba 6 kuya ku-15 MB. Kunzima kakhulu, ukukhishwa kwefreyimu ngayinye ye-PNG yemizuzu engu-10 1080p VOB kukhiqiza ~50 GB jikelele.

Ingabe i-JPG ekhishwayo igcina i-EXIF camera metadata?

I VOB iqoqo aligcinanga i-EXIF nge-frame ngayinye ngendlela ikhamera ehlala isebenza ngayo, ngakho i JPG amafayela aphuma nge-EXIF engenalutho. Sifaka `creation_time` indawo ekhombisa i-source frame timestamp ukuze uphinde uhlanganise i-bundle ngokulandelelana kokuthatha.

Ingabe ithatha isikhathi esingakanani ukukhishwa kwefremu kusuka ku VOB kuya ku JPG?

Ukukhishwa kwefremu kushesha — 20 kuya ku-30% yomthombo wesikhathi sokuphila ku-standard pipeline. Iminithi engu-5 VOB → JPG iqoqo liphelela ku-minithi eyodwa noma ngabe ifremu ibalwa, ngoba i-bottleneck yi JPG encoder, hhayi VOB demuxer.

Ingabe ngizokhipha amafreyimu ezikhathini ezikhethekile ku VOB?

Yebo - ukhetho oluthuthukisiwe luthatha uhlu oluhlukaniswe nge-comma lwesikhathi (isibonelo `00:01:23,00:05:00,00:10:42`) futhi lukhiqiza ihele elinye JPG ngesikhathi. Kuhle kuma-thumbnails wesigaba, ama-scene reference shots, noma ukuthumbnailing izifundo ezide.

VOB

I-VOB iyibhokisi levidiyo le-DVD, equkethe i-MPEG-2 video, umsindo, kanye nesihloko, futhi ingakhonjiswa.

JPG

Amafayela e-JPG asebenzisa ukucindezela okulahlekile okwenzelwe izithombe, okunikeza osayizi abancane bamafayela ngenkathi kugcinwa ikhwalithi yokubuka.