3GP → PNG

Sinthani Yanu 3GP ku PNG mafayilo mosavuta

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Kukweza

Momwe mungasinthire 3GP ku PNG

Gawo 1: Kwezani yanu 3GP mafayilo pogwiritsa ntchito batani lomwe lili pamwambapa kapena pokoka ndi kugwetsa.

Gawo 2: Dinani batani la 'Convert' kuti muyambe kusintha.

Gawo 3: Tsitsani pulogalamu yanu yosinthidwa PNG mafayilo

3GP ku PNG Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndingagwiritse ntchito ma frame amodzi kuchokera ku 3GP ngati PNG zithunzi?

Kutsitsa fayilo ya 3GP ndi wosinthira amatulutsa chisankho cha frame-extraction: chilichonse cha Nth frame, ma frame panthawi yofunikira, kapena chiwonetsero chimodzi pasecond.Katundu uliwonse wosankhidwa umasunthidwa kuchokera ku 3GP video stream, amasinthidwa kukhala fayilo ya PNG yosiyana, ndipo imaphatikizidwa ngati ZIP yotsitsa. 3GP ndi chonyamula 3GPP standardized kwa mafoni amakono, pamene kanema anayenera kugwirizana ndi 176x144 chophimba ndi 2G deta ndondomeko. PNG anapangidwa mu 1996 monga patent-free kuchotsa kwa GIF, ndi anayamba webusaiti default lossless chithunzi mtundu.

Kodi ndingapeze ma frame a PNG osagwiritsa ntchito mawu oyamba?

Ngati 3GP siyimagwiritsa ntchito, chifukwa 3GP siyimagwiritsa ntchito mawu osakira omwe angasankhidwe kuti azimitsa. Chomwecho 3GP chikuwonetsa pazenera ndi chithunzicho, choncho ndicho chilichonse PNG chotulutsa chimapanga ndipo palibe chosankha chomwe chimachotsa pambuyo pake. Mukapeza fayilo yosiyana ya mawu osakira pamodzi ndi kanema, chotsani kuchokera kuzinthu zomwe zidatenga ma frame awiri osiyana. 3GP ndi capped pa low resolutions ndi mono mawu-grade audio; upscaling izo sadzabwezeretsa mfundo zimene zinalibe anataya.

Kodi PNG imathandizira kuwala?

Format imagwira ntchito, koma chiyambicho sichimakhala ndi alpha kuti ipereke - ma frame a video ndi masamba opangidwa ndi mawonekedwe owoneka bwino, kotero kuti ma pixel onse amafika molimba. Chingwe cha alpha chimakhala chothandiza pambuyo pake: kumatanthauza kuti mutha kuchotsa chinthu kuchokera ku PNG pambuyo pake popanda kusintha mtundu. PNG ndi kusankha koyenera kwa zithunzi, malogo, line art ndi chilichonse ndi zosalimba mapiko kapena kuwala - palibe kuyimba, palibe kuwala band.

Kodi ndi chiyani chofunikira pa PNG mafayilo?

Kukula kwakukulu kuposa momwe mungayembekezere, chifukwa PNG imasunga ma pixel onse moyenera kuposa kuyerekezera. 1080p imakhalabe pafupi ndi 2-5 MB ndipo 4K imakhalabe pafupi ndi 6-15 MB, kotero kutulutsa kwanthawi yayitali kumawonjezera mwachangu. Izi ndi malonda abwino pamene zithunzi zimatha kutulutsa kuwongolera, ndipo zoyipa pamene zikuyenda mozungulira patsamba la webusaiti. PNG amagwiritsa ntchito DEFLATE kusamvana pa scanlines zofiltered, choncho aliyense pixel amapulumuka moyenera, kuphatikizapo 8-bit alpha channel.

Kodi ndi yankho liti lomwe limatuluka PNG zithunzi zosadziwika?

Kuwala kofanana ndi choyamba 3GP: 1080p 3GP kumabweretsa 1920x1080 PNG ma frame, 4K 3GP kumabweretsa 3840x2160 PNG ma frame. Wosinthayo sasintha kapena kuchepetsa - ma pixels amachokera pa frame yosinthidwa. Musanagwiritse ntchito /resize-image/ ngati mukufuna zithunzi zochepa.

Kodi ndingagwiritse ntchito chilichonse cha 3GP ngati PNG?

Ndino, koma ganizirani kuchuluka kwa fayilo - 30 fps 1-mphindi 3GP imapanga 1,800 PNG mafremu. Timawapaka m'chigawo chimodzi cha ZIP mwamsanga. Kwa mavidiyo ochepa, yesani "1 pa mphindi" (60 mafremu pa mphindi) kapena kusankha nthawi yoyenera. Ora la 3GP pa mafremu onse lidzapanga ~100,000 PNG zithunzi.

Kodi PNG ma frame adzasunga 3GP kujambula kwa mtundu?

Ndikoyenera - mtundu umasinthidwa ndi mapangidwe omwewo omwe amapezeka patsamba la 3GP (BT.709 kwa HD, BT.2020 kwa 4K HDR). Mafuta a HDR amasinthidwa ku SDR pamene akugwiritsidwa ntchito ku PNG omwe sangathe kusungira ma pixel a HDR mwanjira yachibadwa (JPG, PNG-8).

Kodi ndi chiyani chosapanga dzimbiri chosapanga dzimbiri PNG pa diski?

Kutengera pa resolution ndi PNG codec kusankhidwa: 1080p PNG frame ndi 2-5 MB yopanda kusowa, 1080p JPG pa 85 quality ndi 200-500 KB. Kuwonjezeka kwa mitengo ya frame kuti muchepetse ZIP - pamapeto pake, kutulutsa kwa PNG kwa 10-1080p 3GP kwa 10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-1

Kodi PNG yosakira imasunga metadata ya EXIF ya kamera?

3GP chonyamula sichimangokhala ndi EXIF pa frame momwe kamera ikugwirira ntchito, kotero mafayilo a PNG amatuluka ndi ma blocks EXIF opanda pake. Wosintha amagwiritsa ntchito `creation_time` field yomwe imasonyeza nthawi yoyambira ya frame, kuti muthe kubwezeretsa bundle m'njira yoyenera kapena kugwirizana ndi masamba a subtitle / chapter.

Kodi nthawi yayitali bwanji kuti mutenge chiwonetsero cha 3GP mpaka PNG?

Kusintha kwa frame ndi kosavuta - nthawi zambiri 20-30% ya nthawi yochokera. 5-mphindi 3GP -> PNG bundle imatha m'miphindi 1 popanda kutengera kuti ndi mapazi angati omwe mumasankha, chifukwa chingwe ndi PNG encoder kulemba mafayilo ambiri ochepa mofanana, osati 3GP demuxer.

Kodi ndingagwiritse ntchito ma frame panthawi yoyenera m'mavidiyo a 3GP?

Ndiyo — njira yowonjezera ya timestamp imavomereza mndandanda wogawidwa ndi koma (mwachitsanzo `00:01:23, 00:05:00, 00:10:42.5`) ndipo imapanga fayilo imodzi PNG pa timestamp. Ndikothandiza kwa thumbnails ya chapter, zithunzi zokhudzana ndi scene, kapena kulenga bokosi la mauthenga kuti lifufutidwe.

Kodi 3GP yanga ndi yapadera panthawi yochotsa bokosi?

Yesani - mtundu wofanana wa privacy monga pazosintha zonse. Choyamba 3GP ndi PNG chosakira chimachitidwa m'mabungwe osiyana ndi omwe amachotsa m'maola angapo a kumaliza.

3GP

3GP ndi matumizidwe ophatikizika amawu, nyimbo ndi zithunzi chidebe mtundu anayamba 3G mafoni. Itha kusunga zomvera ndi makanema ndipo imagwiritsidwa ntchito kwambiri pakusewerera makanema am'manja.

PNG

PNG mafayilo amagwiritsa ntchito kuwala kwazithunzi ndi kuchepetsa kuwala kwazithunzi, zomwe zimawapangitsa kukhala abwino kwa zithunzi, malogo, ndi zithunzi zazithunzi.