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Movies and Video For people making movies and editing video with their Mac.

video taking up to much memory

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Lisa Jansson

Member Since: Aug 30, 2009
Posts: 1
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I have a canon hf10 and has been recording on the highest setting, my camera has 16 GB internal memory and I can record appx 2h with the highest setting.
I been transferring movies from the camcorder to imovie 09 and everything seems fine. The problem is that when I look in finder to see how much space the movies take up it says 90 GB and I have maybe 1,5 hours of movie. How is this possible??
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Member Since: Feb 25, 2009
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Mac Specs: Late 2013 rMBP, i7, 750m gpu, OSX versions 10.9.3, 10.10

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That is normal.

The camera is recording in AVCHD format, which is a highly compressed format. That format is not editable by iMovie (or FCE or FCP) and needs to be converted into a format that is easier to edit. iMovie (and FCE) convert the video into a format called Apple Intermediate Codec (AIC), which causes a file to be between 60 and 70 gig per hour.

AIC reduces the workload on a CPU from decompressing the video footage making editing a much more enjoyable job even on lower end machines.

My Macs: Late 2013 rMBP w/ 750m; Mac mini G4, 1.25 GHz, 512m ram (server); Late 2011 11" MBA, 1.8GHz i7, 4Gig Ram, 256Gig SSD, HD3000; Powerbook 12" G4 1.33GHz running Debian as a server; Apple TV (1080p version)
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