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Da wide a narrow : GoPro in generale

Da wide a narrow

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Da wide a narrow

Messaggioda woodoste78 » 20/12/2015, 14:35

Ciao ragazzi vorrei capire una cosa..
Praticamente la ripresa in narrow è il crop che la cam fa del wide.
Io ho un filmato in wide e sto cercando di trasformarlo in narrow ma ho troppa perdita di qualità.
Ho fatto delle prove ho appoggiato la cam sul balcone di casa ho ripreso in wide e poi in narrow per vedere il risultato. Sucessivamente ho preso il file wide e croppato con goprostudio sino ad ottenere il narrow e vedo che tra il file di gopro studio e il file narrow fatto dalla cam c'è molta differenza di rumore, come si fa ad ottenere lo stesso risultato?
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Re: Da wide a narrow

Messaggioda Fred94 » 20/12/2015, 14:44

non puoi ottenere lo stesso risultato..
in quanto quello che esce da gopro è in 1080 puro...invece quando tu dal Wide croppi per arrivare al Narrow riduci di molto la dimensione in termine di pixel dell'immagine.
Una cosa del genere invece puoi farla ad esempio se giri che so in 2,7 oppure in 1440 ma poi vuoi un risultato finale in 1080...allora si puo croppare mantenendo la qualita' del 1080.
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Re: Da wide a narrow

Messaggioda woodoste78 » 20/12/2015, 14:46

mmmm ok però scusa non mi torna perchè il 1080 narrow della gopro è in realtà un crop del 1080 wide solo che viene processato dalla cam
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Re: Da wide a narrow

Messaggioda Fred94 » 20/12/2015, 14:52

..mmmhh..secondo me non è un crop..oppure se è un crop lo è da una dimensione maggiore di ripresa e non da un semplice 1080. :think:
Forse e dico forse..per intuizione mi verrebbe da pensare che per fare un narrow in 1080 magari lei parte dal 1440..chissa'...
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Re: Da wide a narrow

Messaggioda woodoste78 » 20/12/2015, 15:00

si bè in effetti è molto strano!
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Re: Da wide a narrow

Messaggioda blaser » 20/12/2015, 15:31

non è un crop ma un utilizzo diverso del sensore...... il sensore viene utilizzato in base alla risoluzione e impostazione fov.... partendo dalla risoluzione più bassa 480 wga viene utilizzata una minima parte per arrivare al 4K 2160 dove il sensore è utilizzato per tutta la superfice
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Re: Da wide a narrow

Messaggioda woodoste78 » 20/12/2015, 15:59

Ho fatto una prova...
Sembrerebbe che il narrow elaborato col pc sia più simile a quello 1080 se elaborato il file in 2k
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Re: Da wide a narrow

Messaggioda Troglodita » 26/12/2015, 21:55

Quindi sto narrow farebbero meglio ad eliminarlo del tutto, visto che è scadente, così non ci sarebbe gente che acquista illusa dall'idea di poter effettuare buone riprese senza effetto fish eye grazie al narrow.
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Re: Da wide a narrow

Messaggioda Eros » 08/01/2016, 13:51

Perchè? Filmando settato subito in narrow non si ha perdita di qualità
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