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Long Rendering Times with Sony Vegas 12 HD Video

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Tim Gunzenhauser
Long Rendering Times with Sony Vegas 12 HD Video
on Jul 7, 2014 at 2:25:55 am

Hi, i've been having an issue with extremely long rendering times for hd video. It takes roughly 7-9minutes per minute of video which is just crazy.

Computer Specs are I7 3770K (not currently overclocked), GForce NVidia GTX670, 8gigs ram, Vegas installed on SSD HDD, Source Media is on 7200rpm HDD, and Rendered to 7200rpm HDD.
Windows 7, 64bit

Source Video is 1920x1080 60fps 35mbps .mp4 from Canon XA20
Output Video i've tried a few but Main Concept AVC, 1920x1080 30fps, 10mbps dual pass.

No color correction, no fancy transitions or effects, just adding a watermark.

I have GPU acceleration turned off, and that actually improved render times, it used to take even longer.

If I render this same video in windows movie maker, just for comparison it takes less then 10minutes. Which is what i'd expect for a basic render like this.

Thanks in advance for any help or advice


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Steve Rhoden
Re: Long Rendering Times with Sony Vegas 12 HD Video
on Jul 7, 2014 at 2:39:18 am

With all the info you have given along with your workflow,
the rendering time you are getting is quite normal.

Steve Rhoden (Cow Leader)
Film Maker & VFX Artist.
Owner of Filmex Creative Media.
Samples of my Work and Company can be seen here:
http://www.facebook.com/FilmexCreativeMedia


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Tim Gunzenhauser
Re: Long Rendering Times with Sony Vegas 12 HD Video
on Jul 7, 2014 at 2:49:59 am

Wow really ?
So if thats normal is there anything I can do to speed up rendering times ?
Also then I have to ask how is windows movie maker able to render the same video in at 1-1.5minutes per minute of video ?

I could understand, that type of render time with full color correction, lots of effects, several tracks etc. But for a run of the mill video just combining 20-30 clips that seems just nuts.

Thanks for the quick reply.


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Norman Black
Re: Long Rendering Times with Sony Vegas 12 HD Video
on Jul 7, 2014 at 3:42:49 pm

Some file encoders are faster than others. Some file encoders generate better quality than others.

Mainconcept AVC is quite slow. You did not mention if you had Mainconcept AVC set for one or two pass. Two pass being twice as long as a one pass encoder.

Sony AVC is about 2x faster than Mainconcept AVC at 1 pass. You might try that one.


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John Rofrano
Re: Long Rendering Times with Sony Vegas 12 HD Video
on Jul 8, 2014 at 12:16:58 pm

[Norman Black] "Sony AVC is about 2x faster than Mainconcept AVC at 1 pass. You might try that one."
Are you talking about CPU Only renders? Because MainConcept AVC is almost 3.6x faster than Sony AVC with GPU turned on using Open CL with my ATI Radeon HD 5870.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Norman Black
Re: Long Rendering Times with Sony Vegas 12 HD Video
on Jul 8, 2014 at 4:59:45 pm

[John Rofrano] "[Norman Black] "Sony AVC is about 2x faster than Mainconcept AVC at 1 pass. You might try that one."
Are you talking about CPU Only renders?"


Yes. The OP has a Kepler GPU and the Mainconcept AVC CUDA may not support it well, just like what goes on with newer AMD GPUs and MC AVC OpenCL.

That being considered Sony AVC will be faster than MC AVC since MC AVC will always be CPU at that point. Sony AVC supports newer GPUs fine but it only uses GPU for motion estimation as far as I can tell, so only a small speed boost.

IF MC AVC supports your GPU on CUDA/OpenCL then that should definitely be faster.

Sadly I remember the days when MC AVC OpenCL ran at light speed when I have my AMD 5850 GPU. I now have a 7950 and MC AVC does not support that.


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John Rofrano
Re: Long Rendering Times with Sony Vegas 12 HD Video
on Jul 9, 2014 at 1:42:03 pm

[Norman Black] "Sadly I remember the days when MC AVC OpenCL ran at light speed when I have my AMD 5850 GPU. I now have a 7950 and MC AVC does not support that."
Oh yea, I forgot that MainConcept AVC will only accelerate with older OpenCL cards... that kind of defeats the purpose of using OpenCL in the first place. :/

~jr

http://www.johnrofrano.com
http://www.vasst.com



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John Rofrano
Re: Long Rendering Times with Sony Vegas 12 HD Video
on Jul 8, 2014 at 12:13:18 pm

[Tim Gunzenhauser] "Source Video is 1920x1080 60fps 35mbps .mp4 from Canon XA20"
One thing that might cut your render time in half is to shoot 30fps instead of 60fps. You have twice as many frames to process... do you really need them? Try Disable Resample on all of your events and see if that speeds things up.

Also does your project properties match your source properties. If not, that will slow things down.
[Tim Gunzenhauser] "Output Video i've tried a few but Main Concept AVC, 1920x1080 30fps, 10mbps dual pass."
Two pass takes twice as long because it process the video twice. So uncheck the Two Pass option unless you really need it and that will cut your render time in 1/2.
[Tim Gunzenhauser] "I have GPU acceleration turned off, and that actually improved render times, it used to take even longer."
There are two places to turn GPU acceleration on/off. Have you tried keeping in ON for the Timeline (Options | Preferences | Video) but OFF for the Render Template (CPU Only)?

NVIDIA GPU's don't work as well as ATI GPU's with Vegas Pro. One thing you could do is get an ATI GPU.
[Tim Gunzenhauser] "If I render this same video in windows movie maker, just for comparison it takes less then 10minutes. Which is what i'd expect for a basic render like this."
Is the quality the same? If not, then WMM is trading speed for quality. It could also be that WMM is taking full advantage of your NVIDIA GPU while Vegas Pro is not.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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