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Rendering speed

Posted: Mon, 5th Jul 2010, 7:30am

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ryan126

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Hello,
I have a question about Vision Lab. It is running on windows 7 64 bit, 4 gigs of ram, three core processor running 3.6 gigahertz each, and two new five hundred gig hard drives in a raid on a fairly new system. The question i have is the footage takes a long time to preview render. I am working with HD footage and the bar is slowly crawling along with no effects added. Am i doing something wrong? I look at the performance of the processors and they look like they are only doing half speed. Is there any way to speed it up? I did the priority thing in the task manager and it maxed out the processor with no noticeable speed increase. I've done plenty of reinstall and windows reinstall but it doesn't change. Is there going to be an update for 64 bit or multicore processing soon? Also is there any way to do proxies with the video? Thanks.
Posted: Mon, 5th Jul 2010, 8:00am

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spydurhank

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Weeeeeell! V.L. doesn't use all of your installed RAM and or video card as of yet. Hopefully it will soon but, that's anyone's guess. For now... the higher res your footage is and the more layers you have on the timeline... the longer it will take to render no matter how "high performance" your puter is. Cut your video clips into smaller segments for now. They're doing what they can for now but still keep the software affordable so bear with it in the meantime. biggrin

EDIT
I'm running on almost the same O.S. as you are.
Just give it a bit more time and do the best you can in the meantime.
Posted: Mon, 5th Jul 2010, 9:21am

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ryan126

Force: 1200 | Joined: 15th Dec 2008 | Posts: 10

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Thanks for the help.
Posted: Mon, 5th Jul 2010, 12:51pm

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Simon K Jones

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What's the exact processor you're using?

To take a long time to preview unaltered video with no effects seems odd - although it depends on your definition of 'slowly crawling along'. Are we talking 10 seconds per frame, 1 second per frame or what?
Posted: Mon, 5th Jul 2010, 2:15pm

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Joshua Davies

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What kind of footage are we talking about?
Posted: Mon, 5th Jul 2010, 11:40pm

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ryan126

Force: 1200 | Joined: 15th Dec 2008 | Posts: 10

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Hello,
I am running an amd phenom 2 triple core processor. When I meant "slowly crawling" I was meaning that it takes about 2 minutes and 9 seconds to render a 10 second segment at full quality. I might be spoiled but working in Edius at full hd works in real time plus all effects, color grading, and transitions. When i bring down the quality it speeds up but it makes it so hard for precision effects.
Posted: Mon, 5th Jul 2010, 11:41pm

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ryan126

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Also the footage is from a sony hd camcorder.
Posted: Tue, 6th Jul 2010, 1:16am

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Axeman

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SuperUser

When you say HD, do you mean 720 or 1080? Is the footage 24p, 30p, 60i, or what, as far as framerate? Just the difference of interlaced vs. progressive footage can make a big difference, as it effectively doubles the number of fields that VisionLab has to render. When editing, its not necessary to see every field, one field per frame is all that really needs displaying, but for accurate effects work, it is important that every field be displayed so the effects can be placed properly.

So, if the footage is interlaced, your editing app likely eliminates half the data flow off the top, by only displaying one field per frame. VisionLab, on the other hand, can't do that without causing other issues with the effects placement, so it has twice the work to do coming out of the gate, which could obviously have an impact on the speed. Of course, if the footage is progressive, this is irrelevant.
Posted: Tue, 6th Jul 2010, 3:10am

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ryan126

Force: 1200 | Joined: 15th Dec 2008 | Posts: 10

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Thanks. The footage is 1920 by 1080, 50i pall. I also believe it is interlaced odd.