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La GoPro 4 black in base alla luce varia i frame al secondo? : GoPro HERO4 Black

La GoPro 4 black in base alla luce varia i frame al secondo?

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La GoPro 4 black in base alla luce varia i frame al secondo?

Messaggioda valfus » 12/02/2017, 20:48

Salve a tutti, vorrei chiedere questa cosa al forum in quanto ho fatto dei video interni e la luce non era un gran che, però sembrava sufficiente a far vedere le immagini del video.

Allora ho registrato un video con la luce del lampadario a 1080P 120 FPS.
Dopo che ho esportato il video nel PC e andando nelle impostazioni del video come ci si aspetta è un video appunto a 120 FPS.

Fin qui tutto bene.

Apro Gopro Studio per provare a fare un pò di slow motion, seleziono la parte che mi interessa, abbasso i FPS a 29 FPS per fare lo slow, ma sembrerebbe che il video non si vede fluido ma va a scatti regolari, come se fosse stato registrato non a 120 FPS ma inferiore.

Ho fatto la prova con la luce del sole all'esterno sempre a 1080P 120 FPS, ho fatto il video e messo poi dopo su Go pro studio e sembra che lo slow motion viene bene e fluido.

Quindi mi sono chiesto se in base alla luce la Gopro varia i frame al secondo anche se si sono impostati a 120, 90 o 60 FPS.

Qualcuno ha una spiegazione al riguardo?

Grazie
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valfus
 
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Re: La GoPro 4 black in base alla luce varia i frame al seco

Messaggioda Mat » 12/02/2017, 21:26

E' normale che faccia così, succede perchè la frequenza delle lampade ha una frequenza diversa dei fps catturati dalla gopro. Alla luce del sole invece non è un problema. Prova a registrare a 60 o anche 30 fps, non dovrebbe darti questi problemi. Se poi vuoi stare ancora più sul sicuro, registra in PAL anzichè in NTSC : Thumbup :
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Re: La GoPro 4 black in base alla luce varia i frame al seco

Messaggioda valfus » 12/02/2017, 22:51

E' vero hai ragione ora che ci penso la lampadina ha 50 Hz e 25 volte in un secondo è accesa e altri 25 volte in un secondo è spenta.
Quindi se metto una luce continua dovrebbe andare bene.

OK grazie del consoglio.
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