MP4 → 3GP

He, ā, ko te huarahi tere. MP4 me 3GP e tiritiri ana i te hanganga kāwai ā-roto ōrite, kia tārua ai ngā aho whakaata me te oro oro puta noa i te paepae-i-paepae, ā, ka tāruatia anō anake te whākōkī kāwai. Kāore he mea whakakōkī, ā, kāore he mea whakawhāiti anō, kia oti ai tētahi pūranga āhuahira-rohe i raro i te minu i te wā o te wā kotahi, ā, ko te huaputa o te huaputa e ōrite ana ki te pūtake. Ko MP4 te ISO/IEC 14496-14, i paerewa i te tau 2001, ā, i puta mai i te āhua o te kāwai pēnei i te QuickTime e whakamahia ana e MOV. Ko te 3GP te taiwhanga i whakaritea e te 3GPP mō ngā pūrere pāpāho o mua, i te wā e tika ana kia ōrite te ataata ki tētahi mata 176x144 me tētahi mahere raraunga 2G.

Kāore e taea te tīpako, nā te mea kāore he pūwhitinga pūāhua-whakaahua mārō a 3GP hei pupuri i a rātau. E rua ngā ara kia puta mai: ka whakamārō i a rātau ki roto i te ataata i te wā o te tahuritanga, e noho ai rātau ki te noho tonu, ki te kore āhua, ki te whakawātea rānei hei.srt motuhake i te taha o te 3GP mō te pūpāho hei whakarewa. E kī ana te kaiwhakarere ki a koe he aha i mahi ai, kaua e whakawātea i a rātau. E whakawhāititia ana te 3GP ki ngā rongoā iti me te oro-whakahaere-whakahaere; kāore e whakaora ana i ngā taipitopito kāore anō kia whiwhi.

Kāore i te hāngai. MP4 e whakatangitangi ana i roto i ia kaitiaki; 3GP kāore, nā reira ka uru mai tētahi pou e whakatū ana ki tētahi pātahitanga whakahua, ki tētahi tākaro rānei. Mēnā kua whakaritea te faila mō tētahi wāhi, ka pupuri i te MP4 mō te Wīwī, ā, ka whakaarotia te 3GP hei pūranga, hei tārua whakarākei rānei.

Ka whakawāteatia ki te pūoro, nā te mea kāore he ara ā-maha e whakawhirinaki ana ki te 3GP. Ka whakamahia e te whakatata te taurite ITU paerewa kia mau ai te kōrero i te pūtoro matua, ā, ka tae mai ngā rohe ki te taumata iti iho, kaua e ngaro. He mea katoa e whakawhirinaki ana ki te tauwāhi pūtoro motuhake, kua ngaro i muri mai.

E ai ki te 3GP. MP4 te pūnaha ki H.264 mō te tautoko pānui whānui rawa puta noa i ngā pūkoro, ngā kiriata, me ngā Smart TV. MKV te pūnaha ki H.265 / HEVC mō te haurua o te rahi o te faila i te āhuatanga ōrite. Ko te pūnaha WebM ki VP9. Ko ngā kōwhiringa tiketike e whakawātea ana i te kōwhiringa pūnaha mēnā e hiahiatia ana e koe kia whakawātea.

Inā MP4 me 3GP e tiritiri ana i tētahi pūkōrero oro (hei tauira, e mau ana rāua i te AAC), ka whakawāteatia anō te oro me te kore whakawaeheretanga anō - he ōrite te iti. Ki te rerekē ngā pūkōrero, ka whakawaeheretia te oro ki te AAC / Opus / Vorbis i runga anō i te mea e tautoko ana te 3GP. Ka tiakina te oro-maha (whakaaro, reo whirinoa).

Mā te pūmau, ā, — he 24fps MP4 e noho ana i te 24fps i roto i 3GP; he 60fps MP4 e noho ana i te 60fps. Mēnā e hiahiatia ana e koe kia huri i te mokatere (hei tauira, 29.97 → whakatere 30, 60 → 30 rānei mō ngā tepe whakataki), ka whakahaeretia e te kōwhiringa rārangi te 3:2 whakatere, te whakarerekētanga, me te whakakotahitanga rārangi i te whakawhitinga waehere ōrite.

He rite tonu te kōwae-kore-kore (MP4 H.264 → 3GP H.264 e huri ana i te kāwai): tata tonu ki te ōrite te rahi. Ka taea te huri i te kōwae: H.264 → H.265 i te nuinga o te wā e haurua ana te pūranga i te āhuatanga ā-whakaahua ōrite; He āhua ōrite tonu te VP9; AV1 e whakaiti ana i tētahi atu 20-30% engari he pōturi ake te waehere.

MP4 / H.264 e tākaro ana i ngā pūrere o nāianei. E tākaro ana te MOV / H.264 i ngā pūrere Apple me te nuinga o ngā TV engari kāore i te wā katoa i runga i te Android tawhito. E hiahiatia ana e MKV te VLC i runga i te iOS. Ko te WebM te kitenga tuatahi. Kei roto i ngā kōwhiringa tiketike he "whakapae pūrere" e kōwhiri ana i te 3GP codec / waikawa tino haumaru mō tōtou ūnga. He iti noa iho ngā pūkete 3GP, ā, he whakakōrero i runga i ngā pūrere iti rawa e taea te whakaaro, ko te take e whakataki ana tonutia ana e ngā tātari me ngā pūrere iti.

He tata tonu te whakarerekētanga o te pūrere ōrite — 30 ki te 60 ngā takiwā mō tētahi pūranga 1-ora. Ka haere te whakarerekētanga pūrere katoa i te 0.3-0.7x te roanga pūtake i runga i tātau pūtau GPU, nō reira ka oti te 1-ora MP4 → 3GP i roto i ngā minu 18-40 i runga anō i te rongoā me te pūrere ūnga.

Tae atu ki te 8K (7680×4320) i runga i ngā mahere Premium. Ko ngā tahuritanga wātea e whakawhāititia ana ki te 4K (3840×2160) e te tepe o te rahi o te pūkete. Ko ngā metadata HDR (HDR10, HDR10+, Dolby Vision ina tīari) e mau ana i reira e tautoko ana e ngā kāwai MP4 me 3GP.