Hi,

Yesterday I doubled-clicked on a .mov file and rather than simply opening in 
QuickTime, it went through a lengthy conversion process.  The resulting 
"converted" file is twice as large.  This was an HD video that went from 20 GB 
to 40 GB, so it could add up if I convert a bunch of these.

Does anyone know what this is doing?  I did a "get info" on both files.  Both 
are 1920 x 1080 and say "HD (1-1-1)", but under Codecs the original said "Apple 
Intermediate Codec, Linear PCM" and the converted one said "Apple ProRes 422, 
Linear PCM".  Is the converted one better in some way, or just larger?  If not 
better, is there a way to play the original without converting?

Just before clicking the send button, I decided to google my question.  I found 
this Apple support article:

http://support.apple.com/kb/HT6055?viewlocale=en_US&locale=en_US

Apparently QuickTime in Mavericks automatically converts media files that use 
older or third-party codecs.  I'm pretty sure my original .mov file was created 
by importing my camcorder's AVCHD (.MTS) files into Apple's own iPhoto, from 
which I obtained the .mov file.  This appears to be new with Mavericks.

I don't mind waiting for the conversion, but I don't like the doubling in size. 
 Is there any way around that?

Thanks,

Gregg

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