Video Encoding: MB faster than MBP?

[PRvideoGuy]

I'm using MPEG streamclip to re-encode several batches of videos, and there are so many to encode that I'm using 2 Macs at the same time. Oddly, 1 computer is significantly faster than the other. Take a look at the 2 Macs I'm using:

#1 is a MacBook 1,1, 1.83GHz Core Duo, 2 GB RAM, 320GB @7200rpm,
OSX 10.6.3, MPEG streamclip version 1.9.3b3

#2 is a MacBook Pro 1,1 2.16GHz Core Duo, 2 GB RAM, 500GB @7200rpm,
OSX 10.6.3, MPEG streamclip version 1.9.3b3

The encodes are of xvid avi to AIC mov. A client gave me some helmet cam footage to edit together with some 1080i, 720p, and Standard def stuff.

Nothing else is running on either machine.

>>>The MacBook encodes the same videos at ~1.59 Mbps while the MacBook Pro does it at ~1.13 Mbps.
>>>Why does the MB work faster than the MBP?

Thanks for taking a look into this!🙂

 

[smogsy]

i would say the HDD

320GB would have one platter to read.write to the 500GB would have two so the head would need to jump between platters which make increase the speed on the MB by a little but i doubt its the full cause of extra speed in this case

 

[PRvideoGuy]

Odd

Thanks for the input Smogsy! I didn't know that about HDDs.

I'm wondering if there is some sort of rare defect within the MBP - Something that some one else out there has encountered? I really can't think of a solid explanation.

 

[matteusclement]

how full are the HDD's?

also, if the HDD's are more full, your efficiency take a hit.

is the ram the same kind? 667mhz?

 

[PRvideoGuy]

The RAM in the MB is 667 "after market" special. It's HDD has 85 GB available out of 320.

The RAM in the MBP is 667 OEM from Apple. It's HDD has 195 GB available out of 500.