WMV → M4V

Ka taea e ia te mahi engari rawa kāore i te whakawātea, ā, ko ngā ihirangi WMV he tino whakawātea nā te mea ka tae mai te āhua i te wā o te whakawāteatanga me te DVD. Ka rokiroki ngā tātuhi whakawātea i ngā āpure haurua-whakapaetata e rua i whakawāteatia i te rima tekau o te tuarua; i runga i tētahi tātari pūwhitiwhiti, mātakitaki rānei e ako ana hei whakawhāiti whakawhāiti i tētahi mea e neke ana. Ka whakahohe te kōwhiringa whakawhāiti, ā, ka whakawhanake te kaituhituhi i ngā āpure ki ngā tātuhi whakawhāiti katoa i mua i te tuhi i te M4V. Ko WMV te Windows Media Video, he hanga ā-ASF a Microsoft mai i te wā o Windows XP.

Heoi, he whakawhānui tūturu i runga i te WMV. M4V e whakaaro ana ki ia rerenga oro hei rererangi ā-ira tuatahi, kia noho ai te whāranu reo taketake, te tāruatanga me te kōrero a te kaiwhakahaere i tētahi pūranga kotahi me te kaipāpāho e whakawhiti ana i waenganui i a rātau i te tono. E pupuri ana a M4V i ngā tohu wāhanga, i ngā mahi toi me ngā whakataki whakahuatuhi i roto i te āhua e tūmanako ana te Apple TV ki te taupānga, e ngaro ana i te nuinga o te wā te MP4 noa iho.

Ka mahi. M4V e rokiroki ana i ngā wāhanga hei metadata kāwai, nā reira ka taea te whakatere i tētahi pūkete roa e te wāhanga i te wāhi i te wā e whakawātea ana i tētahi pae arā i te whakawātea i tētahi pae arā i te whakawātea i tētahi pae. WMV kaore he wāhi hei whakatakoto i taua mōhiohio, nō reira mēnā ka tukuna te pūtake me tētahi rārangi wāhanga i roto i tētahi pūkete ārai - ka tuku ki te kaiwhakarere, ā, ka tuhituhi ki roto i te M4V.

Tata tonu ki te DRM i ngā wā katoa. Ko ētahi WMV ngā pūranga e whakawaeheretia ana i te taumata bitstream e te puna, i te pūmanawa rānei i tukuna ai rātou, ā, kāore e taea te whakawaehere i tētahi rerenga whakawaeheretia e tātau, e tētahi atu rānei me te kore te kī ā-whakahaere. Ko ngā pūranga i whakahuatia e koe, i whakawātea, i whakawāteatia rānei i te whakarerekētanga kāore i te parea; kāore e taea e te hoko ā-pūmanawa, ā, kāore e taea e te kaiwhakarere te whakaū i tētahi atu mea. He tino tūkino te WMV: e hiahiatia ana e macOS, iOS, Android me ia kaiwhaiwhai ngā whakakōrero tuatoru, ā, ko ētahi pūranga WMV e mau ana i te DRM kāore e taea te tahuri.

Mō ētahi mea e hiahia ana koe ki te pupuri, ā, kei te WMV tētahi whakatupuranga o mua o ngā utauta ataata, ā, ko te pūmanawa e ako ana i a ia e ngaro tonu ana i ngā pūrongo, ngā kiritaki me ngā pūnaha whakahaere. Ko te neke i te pūwhitinga ki M4V ināianei, ahakoa kei te tīariari tonu tētahi whakakōrero mārō, ko te rerekētanga i waenganui i tētahi pūranga ka taea e koe te whakatupuranga tekau tau me tētahi kāore e taea e koe.

E whakawhirinaki ana ki te M4V kōpaka. MP4 te tīpako ki H.264 mō te tautoko pānui whānui rawa puta noa i ngā pūkoro, ngā kiritaki, me ngā Smart TV. MKV te tīpako ki H.265 / HEVC mō te haurua o te rahi o te pūkete i te āhuatanga ōrite. WebM te tīpako ki VP9. Ka whakawātea ngā kōwhiringa hōhonu i te kōwhiringa pūoko mēnā e hiahiatia ana kia whakawāteatia. Ko te M4V he tāupe Apple o MP4, e whakamahia ana e iTunes me te Apple TV app mō ngā whitiāhua me ngā wāhanga TV.

Inā WMV me M4V e tiritiri ana i tētahi pūkōrero oro (hei tauira, e mau ana rāua i te AAC), ka whakawāteatia anō te oro me te kore whakawaenga - ōrite te iti. Ki te rerekē ngā pūkōrero, ka whakawaengatia te oro ki te AAC / Opus / Vorbis i runga anō i te mea e tautoko ana te M4V kāwai. Ka tiakina te oro-maha (whakaaro, reo whirinoa).

Mā te pūmau, ā, — he 24fps WMV e noho ana i te 24fps i roto i M4V; he 60fps WMV e noho ana i te 60fps. Mēnā e hiahiatia ana e koe kia huri i te mokatere (hei tauira, i whakawāteatia te 29.97 → whakawhāiti 30, 60 rānei → 30 mō ngā tepe whakarewa), ka whakahaeretia e te kōwhiringa rārangi te 3:2 whakatata, te whakawāteatanga, me te whakakotahitanga rārangi i te whakawhitinga waehere ōrite.

He rite tonu te whakarerekētanga o te pūkōrero (WMV H.264 → M4V H.264 e huri ana i te kāwai): tata tonu ki te rahi ōrite. Ka taea te huri i te huringa pūkōrero: H.264 → H.265 i te nuinga o te wā e whakawātea ana i te pūkete 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 te āhua o te āhua o ia pūrere hōu. 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 kaiwhaiwāhi tuatahi. Kei roto i ngā kōwhiringa hōu he "whakapae pūrere" e kōwhiri ana i te pūrere/kōrero M4V tino haumaru mō tō rātou whāinga. Kāore e taea te tahuri i ngā hokonga M4V i parea e DRM; ko ngā pūranga M4V kāore i parea anake e taea te tahuri, ā, ko ngā kaiwhakaari kāore i te Apple e hiahiatia ana te whakaroa.

He tata tonu te whakarerekētanga o te pūkōrero ōrite — 30 ki te 60 sekona mō tētahi pūkōrero 1-ora. Ka haere te pūkōrero katoa ki te 0.3-0.7x te roanga pūtake i runga i tātau pūkōrero GPU, nō reira ka oti te 1-ora WMV → M4V i roto i te 18-40 minu e ai ki te rongoā me te pūkōrero ūnga.