Why did my file size get bigger with ProRes

Question

Level 1

5 points

Why did my file size get bigger with ProRes

I just used Mpeg StreamClip to convert my raw mark 2 footage to prores422 and the file sie wen from: 42.7MB to 159.3MB

I know that whats his name... philip bloom recommends Apple XDCAM EX 108030p

However, the quality gos down with this. Maybe I will try Apple XDCAM HD

Any thoughts?

Mac OS X (10.5.4)

Posted on Feb 26, 2010 10:05 AM

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Answer 1

Feb 26, 2010 10:11 AM in response to Andronikosxx

Hi,
Pro res files will always get significantly bigger, thats the nature of the beast, but it works so well in FCP . it's a trade off between HD space and quality.
DM

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Answer 2

Andronikosxx Author

Level 1

5 points

Feb 26, 2010 11:06 AM in response to David Mclaine

So the codec works better in FCP. ProRes so is the ProRes422 too big? Doubling the file size?

What is the best ProRes for Mark2 footage & XH-A1

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Answer 3

Tom Wolsky

Level 10

152,805 points

Feb 26, 2010 11:14 AM in response to Andronikosxx

ProRes 422

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Answer 4

Feb 26, 2010 2:30 PM in response to Tom Wolsky

If your original acquisition is HDV and H.264 the Apple Pro Res 422 is fine, you wont gain anything going with HQ or 4444.

Your H.264 files got much larger because H.264 is heavily compressed and not designed for editing, it is a 'distribution' codec. It is best to convert to a I-frame codec such as Apple Pro Res for editing.

Your next problem may be mixing two different frame rates. The Canon 5D records at 30.0 frames per second and the A1 records at 29.97. I use Cinema Tools to conform (slo-mo) my 5d clips to a friendly frame rate. You need to realize audio will not stay in sync over long durations with this conform process.

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Answer 5

David S.

Level 7

20,636 points

Feb 26, 2010 3:32 PM in response to Andronikosxx

The best conversion is pro res

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