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Rendering speed question

Posted: Tue, 29th Jun 2010, 2:02pm

Post 1 of 5

PhilWesson

Force: 1045 | Joined: 22nd Jan 2010 | Posts: 32

VisionLab User

Gold Member

So I recently made a short video to be used in final cut express.
It was composed of me, some chroma keying, a simple grade object, and a background jpg.
The video clocked in at 1:56, and was rendered at 1280x720.
What surprised me was that it took about 4 hrs to render.

Now, I have a reasonably recent macbook, 4gb ram, 2.24ghz processor, and plenty of hard drive space.
Is there something that I did incorrectly that would cause such a huge render time? Are there tricks to decrease render time across the board?

Here is the video in question:

http://www.youtube.com/watch?v=hqTfGowRhqQ
Posted: Tue, 29th Jun 2010, 2:37pm

Post 2 of 5

Joshua Davies

Force: 25400 | Joined: 21st Mar 2001 | Posts: 3029

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXpreset Maker Windows User MacOS User

FXhome Team Member

The software isn't a Universal Binary so it doesn't run at full speed on your Intel MacBook. It would run much quicker under Windows, even if you used Bootcamp on your MacBook. Hope this helps.
Posted: Tue, 29th Jun 2010, 2:55pm

Post 3 of 5

spydurhank

Force: 1956 | Joined: 24th Jun 2008 | Posts: 1357

VisionLab User VideoWrap User FXpreset Maker Windows User FXhome Movie Maker

Gold Member

I hope not. I'm working with eight second 1440x1080 footage and Visionlab always crashes during preview render right before the three second mark or ninety frames. It got so annoying that I broke the scene down into eight thirty frame increments. Oh and it takes twenty seven seconds to render each frame, I assume that's because I have a bunch of layers with complex effects. I know that the gleam composite and blur filters really hog your ram.

I know it takes longer to render footage that huge but I'm not sure why V.L. crashes. I know this doesn't really help but maybe, try cutting your scenes down into shorter segments.
Posted: Tue, 29th Jun 2010, 3:39pm

Post 4 of 5

PhilWesson

Force: 1045 | Joined: 22nd Jan 2010 | Posts: 32

VisionLab User

Gold Member

I suppose I could slice up my scene into smaller chunks. I was just very surprised because (in my mind) there was so little to compute. I was taking the sound from the original clip, so that wasn't an issue, and it was also the lowest HD resolution. No gleam/glow was involved. Just some chroma and light spill.
Posted: Fri, 2nd Jul 2010, 7:17pm

Post 5 of 5

Hikaru755

Force: 1000 | Joined: 19th Oct 2009 | Posts: 22

VisionLab User FXhome Movie Maker

Gold Member

Could it be, that you have selected "Uncompressed" as Render option? if so, try to change that...