What's required for 1080p 30fps?

joeysarks

macrumors regular
Original poster
Mar 21, 2011
122
0
Detroit
I have a 13 inch baseline Sandy Bridge MBP from 2011, and currently record at 720p 60fps Apple ProRes 422. If I upgraded to Mountain Lion so I could record in 1080p with my Blackmagic, could I record in 1080p 30fps with my current laptop? Maybe if I dropped to Apple ProRes LT?
 

nateo200

macrumors 68030
Feb 4, 2009
2,857
6
Northern District NY
720p60 actually sometimes even exceeds the bit rate of 1080p30 as its something like 2.2x the data. 1080p is 1.5x bigger than 720p but with 60p your adding double the frames than 30p so its really more data with 720p60. You should be fine. I can edit 2K (2048x1556) pretty smoothly on my machine (see in my signature).
 

LethalWolfe

macrumors G3
Jan 11, 2002
9,372
119
Los Angeles
1280 x 720 = 921,600 pixels while 1920 x 1080 = 2,073,600 pixels. So 720p60 is about half the image size but double the frame rate compared to 1080p30. Codecs can vary but with ProRes Apple gives the same data rate to both (147 Mb/s aka 66 GB/hr).
 

joeysarks

macrumors regular
Original poster
Mar 21, 2011
122
0
Detroit
Might not even be an option anymore, my laptop was dropping frames left and right last night:( Might just break down and snag a baseline MacBook Pro and be done with it. I'm getting to 10 minute vids sometimes with heavy efx anyways, I could use the extra horsepower for editing and exporting to save time. Would 16 bgs be recommended or is 8 fine. Whenever I work in Motion 5 or FCPX I only have those programs open by themselves, 16 isn't needed is it?
 

mBox

macrumors 68020
Jun 26, 2002
2,270
29
Download Black Magics Speed Test app from Apple App store.
Helps you check drive speed and spits out format types your drive is capable off.
 

blesscheese

macrumors 6502a
Apr 3, 2010
693
170
Central CA
I'd do what the guys posting above had said: check out the internal drive, and see if that is the bottleneck.

I'd be willing to bet your internal drive is responsible for the slowdown in speed. An external drive might solve the problem, and would be cheaper than a full upgrade (and if you get an external drive, and it doesn't solve the problem, well, then you have another backup for your new Pro).
 

joeysarks

macrumors regular
Original poster
Mar 21, 2011
122
0
Detroit
Digital Video 101:

Do not use your internal drive for footage!!
I use an external. Somehow my two options for warning me about drops in FPS got clicked on though. I turned em off, and now although i can see lil dips in performance, it doesn't stop me from continuing to work.
 

mBox

macrumors 68020
Jun 26, 2002
2,270
29
I use an external. Somehow my two options for warning me about drops in FPS got clicked on though. I turned em off, and now although i can see lil dips in performance, it doesn't stop me from continuing to work.
These days a lot of work is now being done on slower computers such as laptop.
So it doesn't require any real time playback.
Now of course if it was for broadcast and high-end film this isn't true.
Since most just render to file, real-time is moot for most workflows.