Mataki na 1: Loda naka VOB fayiloli ta amfani da maɓallin da ke sama ko ta hanyar ja da sauke su.
Mataki na 2: Danna maɓallin 'Maida' don fara hira.
Mataki na 3: Sauke fayil ɗin da aka canza MP4 fayiloli
VOB zuwa MP4 Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan sake encode VOB zuwa MP4 ba tare da rasa ingancin bidiyo ba?
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Upload your VOB file and set Quality to High Quality in the conversion options. That re-encodes the video at the highest quality setting (CRF 18 for H.264 and VP9 output), which keeps the most detail at the cost of a larger file. The default, Balanced, uses the standard setting. The MP4 output gets a codec its container supports: H.264 for MP4, MOV and MKV, VP9 for WebM. VOB na da MPEG-2 bidiyo, AC-3 ko PCM sauti, da DVD subpicture subtitle streams, raba zuwa 1 GB segments by the DVD spec. A kusa da dukan MP4 a cikin daji ne H.264 bidiyo da AAC sauti; da kwandon kuma doka ke da HEVC, AV1 da VP9.
An raba VOB na rikodin zuwa sassa masu lamba - shin MP4 na da daidaitacce?
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%s: Ba haka ba, kuma wannan ɗayan dalilan da suka fi kyau na motsa. Mai riƙe VOB yana da wani ma'aunin fayil guda wanda za'a iya amfani da shi wajen yin riƙe-riƙe mai tsawo ko mai tsayi, wanda shi ne dalilin da ya sa an samu riƙe-riƙe da yawa kamar ɓangare1, ɓangare2, ɓangare3. MP4 ba shi da wani iyaka mai daidaitawa, don haka za'a iya sake haɗa ɓangarorin cikin fayil guda mai ci gaba. VOB ne raba a kan fayiloli, za a iya CSS-crypted, da ke da navigation packets da shakka general-purpose 'yan wasa.
Ina da VOB dauke da wasu waƙoƙin sauti - shin za su iya tsira cikin MP4?
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%s: Ba haka ba. Mai canzawa yana riƙe da wani waƙoƙin sauti guda, wanda yake da mafi yawan tashoshi (a kan mafi yawan lokuta, shi ne babban haɗin), kuma yana cire sauran; babu wani tsari na zaɓar wani daban. Don riƙe wani waƙoƙin, za ka iya sake haɗa VOB da wannan waƙoƙin farko (VLC ko ffmpeg na iya yin wannan), sa'an nan ka canja shi. VOB na kiyaye duk DVD payload - da yawa angles, da yawa audio harsuna da subtitles layuka duka tsira cikin shi. MP4 na goyon bayan wani nau'in rubutu na ƙarshe kawai (mov_text), kuma sauti mai layuka da yawa ba a yarda da shi ba a waje da masu wasa na kwamfyuta.
Me ya sa fayil ɗin VOB na ba zai iya canjawa zuwa MP4 ba?
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DRM. Wasu VOB fayiloli ana rufe su a mataki na bitstream ta wurin shagon ko manhajar da ta fitar da su, kuma ba za a iya rufe wani mataki da aka rufe ba ta hanyarmu ko kuma wani abu ba tare da maɓallin lasisi. Fayiloli da ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka riga ka
Shin, za a yi wasa da MP4 a cikin wani shafukai idan VOB bai yi ba?
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Yanzu, wannan shi ne dalilin da ya sa aka yi wannan canji. VOB da aka saka cikin wani shafi na yanar gizo yana nuna wani mai wasa da ya karya ko kuma yana tilasta wani saukewa, saboda masu bincike ba su da wani mai decoder don shi. MP4 yana wasa cikin layin ta hanyar ɓangaren bidiyo na HTML5 na asali ba tare da wata ƙara ba da kuma ba tare da wata shirin ayuka na waje ba. MP4 shi ne mafi aminci da yiwuwar isar da manufa - duk wayar hannu, mai bincike, console, mai shiryawa da Smart TV gina a cikin ƙarni na ƙarshe yana wasa da shi ba tare da kayan aikin ƙari ba.
Shin yana da kyau a canja wa VOB da aka riga aka yi zuwa MP4?
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Ga duk abin da kake son kiyayewa, na'am. VOB yana da alaka da wani zamani na baya na kayan aikin bidiyo kuma kayan aikin da ke karanta shi yana faruwa da sauri daga wayoyin hannu, masu bincike da tsarin aiki. Motsa bidiyo zuwa MP4 yanzu, yayin da mai decoder mai tsafta ke nan, shi ne bambanci tsakanin wata arshiya da zaka iya buɗewa cikin shekaru goma da wata da ba za ka iya buɗewa ba.
Wanne codec na bidiyo ne fitarwa MP4 take amfani dashi?
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It depends on the MP4 container. MP4, MOV and MKV output use H.264, which plays on practically every phone, browser and TV. WebM output uses VP9. AVI, WMV and MPEG output use the older codecs those formats were designed for. MP4 ne ISO/IEC 14496-14, standardized a cikin 2001 da kuma dauke daga irin QuickTime akwatin zane MOV amfani.
Shin za'a iya canza waƙoƙina na sauti daga VOB zuwa MP4?
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Yes, the main audio track comes through, re-encoded to a codec the MP4 container plays, for example AAC in MP4 and MOV or Opus in WebM. Most conversions keep only that one track (the one with the most channels), so alternate languages and commentary are dropped. MP4 to MOV, and AVI, WMV, MPEG, FLV, VOB or M4V to MKV, keep every audio track.
Shin zan iya riƙe ƙimar firam na farko idan na canja VOB zuwa MP4?
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Yanzu. An riƙe adadin firam sai kun canza shi: 24 fps VOB yana da 24 fps a cikin MP4. Shirin adadin firam na iya canzawa zuwa 60, 30 ko 24 fps. Yana canja adadin kawai; ba zai cire haɗin bidiyo ba ko kuma cire 3:2 pulldown.
Menene girman fayil ɗin da zai canza daga VOB zuwa MP4?
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Wannan yana dogara da abin da ke faruwa ga bidiyo. MKV zuwa MP4 ko MOV tare da daidaitattun diff yana kwafewa bidiyo stream ba tare da canji ba, don haka girman yana da nisa zuwa wurin asali. Mafi yawan sauran ma'aurata suna sake encode shi: high-bitrate VOB yana da kyau ya fita mafi ƙaranci, yayin da wani wanda ya riga ya yi nauyi ya iya girma. Fitar da Fayil Mai Kauri a ƙarƙashin Tsarin Yana ba da mafi ƙarancin fitarwa, kuma H.265 a cikin daidaitattun Codec (MP4, MOV da MKV) yana da kyau mafi ƙaranci fiye da H.264 a matsayin inganci mai kama da shi amma yana wasa a kan na'urori kaɗan.
Shin fayil MP4 zai iya wasa a kan iPhone, Android, da Smart TVs?
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MP4 tare da H.264 wasa a kan kusan kowace wayar, mai bincike da TV. MOV tare da H.264 wasa a kan Apple na'urorin da mafi TV amma ba a kan kowace mafi girma Android waya. MKV bukatar wani app kamar VLC a kan iOS, da WebM ne a gida a cikin masu bincike. Babu wani na'urar preset a kan wannan shafi, don haka zaɓi da format na manufa na'urar ka goyon baya.
Menene lokacin da za'a yi wa canja bidiyo mai awa 1 zuwa VOB zuwa MP4?
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There is no fixed time: it depends on the length, the resolution and the target format. Conversions run on our servers' CPUs with software encoders; there is no GPU acceleration. MKV to MP4 or MOV with the default settings copies the video stream and is the quickest. A re-encode to H.264 takes longer, and WebM (VP9) is the slowest target, several times slower than H.264 in our tests.
