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Preview Lag (yup, another one of these posts)
I’ve been looking through posts to try to improve my preview lag, but nothing seems to work.
All I have is some smooth pans on still image PNGs. Preview/Half and Good/Half are the highest settings that play these smoothly. If a text layer is added though, the framerate drops to 20-25. And a 2nd layer of text, and it goes down to 15 frames. Nothing plays smoothly at full, even the panning image with no text over it.
Now for the specs. I am running the final build of Vegas Pro 11 64 bit.
I7 3770K 3.5 GHz CPU (4 core + hyperthreading).
Geforce 660GTX
16 GBs of Ram.
1TB hard drive, 700 GBs free.I can run modern games on max settings, but I can’t pan a still image smoothly? Is this my problem, or is Vegas just not really good at handling some stuff? I’ve actually been looking into this stuff for years, trying different things, so I have done just about everything you can imagine.
Thank you
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6 Replies
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I’d suggest to set your preview/auto instead of half.
You know that doesn’t change the quality when you render.Roger Bansemer – PaintingAndTravel.com
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What is the size of your PNG file(s)?
What is the size of your crop/pan?
What is your project setting?If the crop size is not the same size as your project setting then an interpolation is done to generate each video frame at the project size. If your project frame rate is 30fps, then that means Vegas must generate 30 interpolations per second.
Interpolation is a time consuming process. A million cores won’t help. It is single threaded. GPU enabled in Video prefs seems to help.
Depending on the size of your stills, reducing their size can help. So long as your crop/pan never gets smaller than your project size you are okay. You can use some tool like Infranview or Photoshop to reduce your stills dimensions.
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Well the image looks awful if I set it any lower than Preview/Half, so I don’t want to do that.
The project is 1080P. I have tested a few different settings and saw no effect in the framerate. I animate comics, so the crop size is basically never the project size. And I don’t want to reduce the quality of the images. I’m guessing there’s no way to turn off the Interpolation.
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[William Terrio] “And I don’t want to reduce the quality of the images.”
Your output is going to be 1920×1080. You can resize your images to 1920×1080 with an image editor designed for that or you can let a video program take a shot at it. Either way… your quality is getting reduced to HD 1920×1080 and there is nothing you can do about it. If you want smooth playback, reduce your image to HD outside of Vegas or let Vegas do it 30 times a second over, and over, and over again (which was Norman’s original point).
~jr
http://www.johnrofrano.com
http://www.vasst.com -
>>I’m guessing there’s no way to turn off the Interpolation.
By definition you cannot turn interpolation off when the crop is not the same size as the project output. The crop must be resized to project output size.
If the crop is bigger than project output then the crop still needs to be interpolated(resized) down to project size.
If the crop is smaller than project, the crop is interpolated up to project size.For best quality you want the crop size greater than or equal to the project output size. The closer your crop is to the project size the faster the resize will be since there are less pixels to interpolate from the crop. Less pixels means less work.
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Thank you for your help guys. It’s nice to know how it works and why, even though if I didn’t find the answer I was hoping for. In my situation I will just have to live with it I suppose.
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