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Unusual render times

Feb 4, 2014 5:41 PM

Tags: #file #slow #render #small #long #too #fluctuate

Hello, I seem to be experiencing weird, fluctuating render times with my projects. Some 10+ minute projects render in 20 minutes or so, others like the one below take far too long for what they are.


I am running a Macbook Pro, 2.5ghz Intel Core i7, 8GB 1333 Mhz DDR3 ram, and an AMD Radeon HD 6770M 1GB.


Here is a current project I am working on at the moment - please excuse the blurred sections, this is an internal business video and I am required to do this for security.


The maximum filesize will only be est. 134mb, the length of the video is 3 and a half minutes, and I am only rendering at 720p with 90 second keyframes. When I render this file it takes upwards of 2 hours; sometimes longer.




The source files are 1920x1080 and 1440x1080, and I have 4-5 nested sequences approx 10-20 seconds long each with warp stabilizer applied to them.

I also have fast color corrector applied to all clips. I usually have a VBR of min-4 max-6 but attempted to change it to CBR to see if that decreased rendering time; it didn't.

I've also tried optimizing the memory for both rendering and memory in the preferences window, but I see no difference.


Can you spot anything that might be causing this render to take so long?


Thanks in advance for your help.




  • Currently Being Moderated
    Feb 4, 2014 5:52 PM   in reply to Brendan.JB

    I am not surprised!


    You got a ot going on there in the differences between source and export


    Frame rate : PAL to NTSC...


    Square pixel to rectangular


    Dimension change


    WHy did you choose those settings?


    Did source footage match the project settings?

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  • Currently Being Moderated
    Feb 4, 2014 6:37 PM   in reply to Brendan.JB

    Sounds like random settings choice issue!




    what are the source files?

    what was the sequence setting?

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  • Currently Being Moderated
    Feb 4, 2014 7:01 PM   in reply to Brendan.JB



    You still got a lot going on there with mixed media, fx, warp stab. etc...but I cant see anyway around it in your case.



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